GDAL

Classes | Macros | Typedefs | Enumerations | Functions
ogr_srs_api.h File Reference

C spatial reference system services and defines. More...

`#include <stdbool.h>`
`#include "ogr_core.h"`

Go to the source code of this file.

## Classes
struct | OSRCRSInfo
| Structure given overall description of a CRS. More...

## Macros
#define | SRS_WKT_WGS84_LAT_LONG
| WGS 84 geodetic (lat/long) WKT / EPSG:4326 with lat,long ordering.
#define | SRS_PT_ALBERS_CONIC_EQUAL_AREA "Albers_Conic_Equal_Area"
| Albers_Conic_Equal_Area projection.
#define | SRS_PT_AZIMUTHAL_EQUIDISTANT "Azimuthal_Equidistant"
| Azimuthal_Equidistant projection.
#define | SRS_PT_CASSINI_SOLDNER "Cassini_Soldner"
| Cassini_Soldner projection.
#define | SRS_PT_CYLINDRICAL_EQUAL_AREA "Cylindrical_Equal_Area"
| Cylindrical_Equal_Area projection.
#define | SRS_PT_BONNE "Bonne"
| Cylindrical_Equal_Area projection.
#define | SRS_PT_ECKERT_I "Eckert_I"
| Eckert_I projection.
#define | SRS_PT_ECKERT_II "Eckert_II"
| Eckert_II projection.
#define | SRS_PT_ECKERT_III "Eckert_III"
| Eckert_III projection.
#define | SRS_PT_ECKERT_IV "Eckert_IV"
| Eckert_IV projection.
#define | SRS_PT_ECKERT_V "Eckert_V"
| Eckert_V projection.
#define | SRS_PT_ECKERT_VI "Eckert_VI"
| Eckert_VI projection.
#define | SRS_PT_EQUIDISTANT_CONIC "Equidistant_Conic"
| Equidistant_Conic projection.
#define | SRS_PT_EQUIRECTANGULAR "Equirectangular"
| Equirectangular projection.
#define | SRS_PT_GALL_STEREOGRAPHIC "Gall_Stereographic"
| Gall_Stereographic projection.
#define | SRS_PT_GAUSSSCHREIBERTMERCATOR "Gauss_Schreiber_Transverse_Mercator"
| Gauss_Schreiber_Transverse_Mercator projection.
#define | SRS_PT_GEOSTATIONARY_SATELLITE "Geostationary_Satellite"
| Geostationary_Satellite projection.
#define | SRS_PT_GOODE_HOMOLOSINE "Goode_Homolosine"
| Goode_Homolosine projection.
#define | SRS_PT_IGH "Interrupted_Goode_Homolosine"
| Interrupted_Goode_Homolosine projection.
#define | SRS_PT_GNOMONIC "Gnomonic"
| Gnomonic projection.
#define | SRS_PT_HOTINE_OBLIQUE_MERCATOR_AZIMUTH_CENTER "Hotine_Oblique_Mercator_Azimuth_Center"
| Hotine_Oblique_Mercator_Azimuth_Center projection.
#define | SRS_PT_HOTINE_OBLIQUE_MERCATOR "Hotine_Oblique_Mercator"
| Hotine_Oblique_Mercator projection.
#define | SRS_PT_HOTINE_OBLIQUE_MERCATOR_TWO_POINT_NATURAL_ORIGIN "Hotine_Oblique_Mercator_Two_Point_Natural_Origin"
| Hotine_Oblique_Mercator_Two_Point_Natural_Origin projection.
#define | SRS_PT_LABORDE_OBLIQUE_MERCATOR "Laborde_Oblique_Mercator"
| Laborde_Oblique_Mercator projection.
#define | SRS_PT_LAMBERT_CONFORMAL_CONIC_1SP "Lambert_Conformal_Conic_1SP"
| Lambert_Conformal_Conic_1SP projection.
#define | SRS_PT_LAMBERT_CONFORMAL_CONIC_2SP "Lambert_Conformal_Conic_2SP"
| Lambert_Conformal_Conic_2SP projection.
#define | SRS_PT_LAMBERT_CONFORMAL_CONIC_2SP_BELGIUM "Lambert_Conformal_Conic_2SP_Belgium"
| Lambert_Conformal_Conic_2SP_Belgium projection.
#define | SRS_PT_LAMBERT_AZIMUTHAL_EQUAL_AREA "Lambert_Azimuthal_Equal_Area"
| Lambert_Azimuthal_Equal_Area projection.
#define | SRS_PT_MERCATOR_1SP "Mercator_1SP"
| Mercator_1SP projection.
#define | SRS_PT_MERCATOR_2SP "Mercator_2SP"
| Mercator_2SP projection.
#define | SRS_PT_MERCATOR_AUXILIARY_SPHERE "Mercator_Auxiliary_Sphere"
| Mercator_Auxiliary_Sphere is used used by ESRI to mean EPSG:3875.
#define | SRS_PT_MILLER_CYLINDRICAL "Miller_Cylindrical"
| Miller_Cylindrical projection.
#define | SRS_PT_MOLLWEIDE "Mollweide"
| Mollweide projection.
#define | SRS_PT_NEW_ZEALAND_MAP_GRID "New_Zealand_Map_Grid"
| New_Zealand_Map_Grid projection.
#define | SRS_PT_OBLIQUE_STEREOGRAPHIC "Oblique_Stereographic"
| Oblique_Stereographic projection.
#define | SRS_PT_ORTHOGRAPHIC "Orthographic"
| Orthographic projection.
#define | SRS_PT_POLAR_STEREOGRAPHIC "Polar_Stereographic"
| Polar_Stereographic projection.
#define | SRS_PT_POLYCONIC "Polyconic"
| Polyconic projection.
#define | SRS_PT_ROBINSON "Robinson"
| Robinson projection.
#define | SRS_PT_SINUSOIDAL "Sinusoidal"
| Sinusoidal projection.
#define | SRS_PT_STEREOGRAPHIC "Stereographic"
| Stereographic projection.
#define | SRS_PT_SWISS_OBLIQUE_CYLINDRICAL "Swiss_Oblique_Cylindrical"
| Swiss_Oblique_Cylindrical projection.
#define | SRS_PT_TRANSVERSE_MERCATOR "Transverse_Mercator"
| Transverse_Mercator projection.
#define | SRS_PT_TRANSVERSE_MERCATOR_SOUTH_ORIENTED "Transverse_Mercator_South_Orientated"
| Transverse_Mercator_South_Orientated projection.
#define | SRS_PT_TRANSVERSE_MERCATOR_MI_21 "Transverse_Mercator_MapInfo_21"
| Transverse_Mercator_MapInfo_21 projection.
#define | SRS_PT_TRANSVERSE_MERCATOR_MI_22 "Transverse_Mercator_MapInfo_22"
| Transverse_Mercator_MapInfo_22 projection.
#define | SRS_PT_TRANSVERSE_MERCATOR_MI_23 "Transverse_Mercator_MapInfo_23"
| Transverse_Mercator_MapInfo_23 projection.
#define | SRS_PT_TRANSVERSE_MERCATOR_MI_24 "Transverse_Mercator_MapInfo_24"
| Transverse_Mercator_MapInfo_24 projection.
#define | SRS_PT_TRANSVERSE_MERCATOR_MI_25 "Transverse_Mercator_MapInfo_25"
| Transverse_Mercator_MapInfo_25 projection.
#define | SRS_PT_TUNISIA_MINING_GRID "Tunisia_Mining_Grid"
| Tunisia_Mining_Grid projection.
#define | SRS_PT_TWO_POINT_EQUIDISTANT "Two_Point_Equidistant"
| Two_Point_Equidistant projection.
#define | SRS_PT_VANDERGRINTEN "VanDerGrinten"
| VanDerGrinten projection.
#define | SRS_PT_KROVAK "Krovak"
| Krovak projection.
#define | SRS_PT_IMW_POLYCONIC "International_Map_of_the_World_Polyconic"
| International_Map_of_the_World_Polyconic projection.
#define | SRS_PT_WAGNER_I "Wagner_I"
| Wagner_I projection.
#define | SRS_PT_WAGNER_II "Wagner_II"
| Wagner_II projection.
#define | SRS_PT_WAGNER_III "Wagner_III"
| Wagner_III projection.
#define | SRS_PT_WAGNER_IV "Wagner_IV"
| Wagner_IV projection.
#define | SRS_PT_WAGNER_V "Wagner_V"
| Wagner_V projection.
#define | SRS_PT_WAGNER_VI "Wagner_VI"
| Wagner_VI projection.
#define | SRS_PT_WAGNER_VII "Wagner_VII"
| Wagner_VII projection.
#define | SRS_PT_QSC "Quadrilateralized_Spherical_Cube"
| Quadrilateralized_Spherical_Cube projection.
#define | SRS_PT_AITOFF "Aitoff"
| Aitoff projection.
#define | SRS_PT_WINKEL_I "Winkel_I"
| Winkel_I projection.
#define | SRS_PT_WINKEL_II "Winkel_II"
| Winkel_II projection.
#define | SRS_PT_WINKEL_TRIPEL "Winkel_Tripel"
| Winkel_Tripel projection.
#define | SRS_PT_CRASTER_PARABOLIC "Craster_Parabolic"
| Craster_Parabolic projection.
#define | SRS_PT_LOXIMUTHAL "Loximuthal"
| Loximuthal projection.
#define | SRS_PT_QUARTIC_AUTHALIC "Quartic_Authalic"
| Quartic_Authalic projection.
#define | SRS_PT_SCH "Spherical_Cross_Track_Height"
| Spherical_Cross_Track_Height projection.
#define | SRS_PP_CENTRAL_MERIDIAN "central_meridian"
| central_meridian projection parameter
#define | SRS_PP_SCALE_FACTOR "scale_factor"
| scale_factor projection parameter
#define | SRS_PP_STANDARD_PARALLEL_1 "standard_parallel_1"
| standard_parallel_1 projection parameter
#define | SRS_PP_STANDARD_PARALLEL_2 "standard_parallel_2"
| standard_parallel_2 projection parameter
#define | SRS_PP_PSEUDO_STD_PARALLEL_1 "pseudo_standard_parallel_1"
| pseudo_standard_parallel_1 projection parameter
#define | SRS_PP_LONGITUDE_OF_CENTER "longitude_of_center"
| longitude_of_center projection parameter
#define | SRS_PP_LATITUDE_OF_CENTER "latitude_of_center"
| latitude_of_center projection parameter
#define | SRS_PP_LONGITUDE_OF_ORIGIN "longitude_of_origin"
| longitude_of_origin projection parameter
#define | SRS_PP_LATITUDE_OF_ORIGIN "latitude_of_origin"
| latitude_of_origin projection parameter
#define | SRS_PP_FALSE_EASTING "false_easting"
| false_easting projection parameter
#define | SRS_PP_FALSE_NORTHING "false_northing"
| false_northing projection parameter
#define | SRS_PP_AZIMUTH "azimuth"
| azimuth projection parameter
#define | SRS_PP_LONGITUDE_OF_POINT_1 "longitude_of_point_1"
| longitude_of_point_1 projection parameter
#define | SRS_PP_LATITUDE_OF_POINT_1 "latitude_of_point_1"
| latitude_of_point_1 projection parameter
#define | SRS_PP_LONGITUDE_OF_POINT_2 "longitude_of_point_2"
| longitude_of_point_2 projection parameter
#define | SRS_PP_LATITUDE_OF_POINT_2 "latitude_of_point_2"
| latitude_of_point_2 projection parameter
#define | SRS_PP_LONGITUDE_OF_POINT_3 "longitude_of_point_3"
| longitude_of_point_3 projection parameter
#define | SRS_PP_LATITUDE_OF_POINT_3 "latitude_of_point_3"
| latitude_of_point_3 projection parameter
#define | SRS_PP_RECTIFIED_GRID_ANGLE "rectified_grid_angle"
| rectified_grid_angle projection parameter
#define | SRS_PP_LANDSAT_NUMBER "landsat_number"
| landsat_number projection parameter
#define | SRS_PP_PATH_NUMBER "path_number"
| path_number projection parameter
#define | SRS_PP_PERSPECTIVE_POINT_HEIGHT "perspective_point_height"
| perspective_point_height projection parameter
#define | SRS_PP_SATELLITE_HEIGHT "satellite_height"
| satellite_height projection parameter
#define | SRS_PP_FIPSZONE "fipszone"
| fipszone projection parameter
#define | SRS_PP_ZONE "zone"
| zone projection parameter
#define | SRS_PP_LATITUDE_OF_1ST_POINT "Latitude_Of_1st_Point"
| Latitude_Of_1st_Point projection parameter.
#define | SRS_PP_LONGITUDE_OF_1ST_POINT "Longitude_Of_1st_Point"
| Longitude_Of_1st_Point projection parameter.
#define | SRS_PP_LATITUDE_OF_2ND_POINT "Latitude_Of_2nd_Point"
| Latitude_Of_2nd_Point projection parameter.
#define | SRS_PP_LONGITUDE_OF_2ND_POINT "Longitude_Of_2nd_Point"
| Longitude_Of_2nd_Point projection parameter.
#define | SRS_PP_PEG_POINT_LATITUDE "peg_point_latitude"
| peg_point_latitude projection parameter
#define | SRS_PP_PEG_POINT_LONGITUDE "peg_point_longitude"
| peg_point_longitude projection parameter
#define | SRS_PP_PEG_POINT_HEADING "peg_point_heading"
| peg_point_heading projection parameter
#define | SRS_PP_PEG_POINT_HEIGHT "peg_point_height"
| peg_point_height projection parameter
#define | SRS_UL_METER "Meter"
| Linear unit Meter.
#define | SRS_UL_FOOT "Foot (International)" /* or just "FOOT"? */
| Linear unit Foot (International)
#define | SRS_UL_FOOT_CONV "0.3048"
| Linear unit Foot (International) conversion factor to meter.
#define | SRS_UL_US_FOOT "Foot_US" /* or "US survey foot" from EPSG */
| Linear unit Foot.
#define | SRS_UL_US_FOOT_CONV "0.3048006096012192"
| Linear unit Foot conversion factor to meter.
#define | SRS_UL_NAUTICAL_MILE "Nautical Mile"
| Linear unit Nautical Mile.
#define | SRS_UL_NAUTICAL_MILE_CONV "1852.0"
| Linear unit Nautical Mile conversion factor to meter.
#define | SRS_UL_LINK "Link" /* Based on US Foot */
| Linear unit Link.
#define | SRS_UL_LINK_CONV "0.20116684023368047"
| Linear unit Link conversion factor to meter.
#define | SRS_UL_CHAIN "Chain" /* based on US Foot */
| Linear unit Chain.
#define | SRS_UL_CHAIN_CONV "20.116684023368047"
| Linear unit Chain conversion factor to meter.
#define | SRS_UL_ROD "Rod" /* based on US Foot */
| Linear unit Rod.
#define | SRS_UL_ROD_CONV "5.02921005842012"
| Linear unit Rod conversion factor to meter.
#define | SRS_UL_LINK_Clarke "Link_Clarke"
| Linear unit Link_Clarke.
#define | SRS_UL_LINK_Clarke_CONV "0.2011661949"
| Linear unit Link_Clarke conversion factor to meter.
#define | SRS_UL_KILOMETER "Kilometer"
| Linear unit Kilometer.
#define | SRS_UL_KILOMETER_CONV "1000."
| Linear unit Kilometer conversion factor to meter.
#define | SRS_UL_DECIMETER "Decimeter"
| Linear unit Decimeter.
#define | SRS_UL_DECIMETER_CONV "0.1"
| Linear unit Decimeter conversion factor to meter.
#define | SRS_UL_CENTIMETER "Centimeter"
| Linear unit Decimeter.
#define | SRS_UL_CENTIMETER_CONV "0.01"
| Linear unit Decimeter conversion factor to meter.
#define | SRS_UL_MILLIMETER "Millimeter"
| Linear unit Millimeter.
#define | SRS_UL_MILLIMETER_CONV "0.001"
| Linear unit Millimeter conversion factor to meter.
#define | SRS_UL_INTL_NAUT_MILE "Nautical_Mile_International"
| Linear unit Nautical_Mile_International.
#define | SRS_UL_INTL_NAUT_MILE_CONV "1852.0"
| Linear unit Nautical_Mile_International conversion factor to meter.
#define | SRS_UL_INTL_INCH "Inch_International"
| Linear unit Inch_International.
#define | SRS_UL_INTL_INCH_CONV "0.0254"
| Linear unit Inch_International conversion factor to meter.
#define | SRS_UL_INTL_FOOT "Foot_International"
| Linear unit Foot_International.
#define | SRS_UL_INTL_FOOT_CONV "0.3048"
| Linear unit Foot_International conversion factor to meter.
#define | SRS_UL_INTL_YARD "Yard_International"
| Linear unit Yard_International.
#define | SRS_UL_INTL_YARD_CONV "0.9144"
| Linear unit Yard_International conversion factor to meter.
#define | SRS_UL_INTL_STAT_MILE "Statute_Mile_International"
| Linear unit Statute_Mile_International.
#define | SRS_UL_INTL_STAT_MILE_CONV "1609.344"
| Linear unit Statute_Mile_Internationalconversion factor to meter.
#define | SRS_UL_INTL_FATHOM "Fathom_International"
| Linear unit Fathom_International.
#define | SRS_UL_INTL_FATHOM_CONV "1.8288"
| Linear unit Fathom_International conversion factor to meter.
#define | SRS_UL_INTL_CHAIN "Chain_International"
| Linear unit Chain_International.
#define | SRS_UL_INTL_CHAIN_CONV "20.1168"
| Linear unit Chain_International conversion factor to meter.
#define | SRS_UL_INTL_LINK "Link_International"
| Linear unit Link_International.
#define | SRS_UL_INTL_LINK_CONV "0.201168"
| Linear unit Link_International conversion factor to meter.
#define | SRS_UL_US_INCH "Inch_US_Surveyor"
| Linear unit Inch_US_Surveyor.
#define | SRS_UL_US_INCH_CONV "0.025400050800101603"
| Linear unit Inch_US_Surveyor conversion factor to meter.
#define | SRS_UL_US_YARD "Yard_US_Surveyor"
| Linear unit Yard_US_Surveyor.
#define | SRS_UL_US_YARD_CONV "0.914401828803658"
| Linear unit Yard_US_Surveyor conversion factor to meter.
#define | SRS_UL_US_CHAIN "Chain_US_Surveyor"
| Linear unit Chain_US_Surveyor.
#define | SRS_UL_US_CHAIN_CONV "20.11684023368047"
| Linear unit Chain_US_Surveyor conversion factor to meter.
#define | SRS_UL_US_STAT_MILE "Statute_Mile_US_Surveyor"
| Linear unit Statute_Mile_US_Surveyor.
#define | SRS_UL_US_STAT_MILE_CONV "1609.347218694437"
| Linear unit Statute_Mile_US_Surveyor conversion factor to meter.
#define | SRS_UL_INDIAN_YARD "Yard_Indian"
| Linear unit Yard_Indian.
#define | SRS_UL_INDIAN_YARD_CONV "0.91439523"
| Linear unit Yard_Indian conversion factor to meter.
#define | SRS_UL_INDIAN_FOOT "Foot_Indian"
| Linear unit Foot_Indian.
#define | SRS_UL_INDIAN_FOOT_CONV "0.30479841"
| Linear unit Foot_Indian conversion factor to meter.
#define | SRS_UL_INDIAN_CHAIN "Chain_Indian"
| Linear unit Chain_Indian.
#define | SRS_UL_INDIAN_CHAIN_CONV "20.11669506"
| Linear unit Chain_Indian conversion factor to meter.
#define | SRS_UA_DEGREE "degree"
| Angular unit degree.
#define | SRS_UA_DEGREE_CONV "0.0174532925199433"
| Angular unit degree conversion factor to radians.
#define | SRS_UA_RADIAN "radian"
| Angular unit radian.
#define | SRS_PM_GREENWICH "Greenwich"
| Prime meridian Greenwich.
#define | SRS_DN_NAD27 "North_American_Datum_1927"
| North_American_Datum_1927 datum name.
#define | SRS_DN_NAD83 "North_American_Datum_1983"
| North_American_Datum_1983 datum name.
#define | SRS_DN_WGS72 "WGS_1972"
| WGS_1972 datum name.
#define | SRS_DN_WGS84 "WGS_1984"
| WGS_1984 datum name.
#define | SRS_WGS84_SEMIMAJOR 6378137.0
| Semi-major axis of the WGS84 ellipsoid.
#define | SRS_WGS84_INVFLATTENING 298.257223563
| Inverse flattening of the WGS84 ellipsoid.

## Typedefs
typedef void * | OGRSpatialReferenceH
| Opaque type for a Spatial Reference object.
typedef void * | OGRCoordinateTransformationH
| Opaque type for a coordinate transformation object.
typedef struct OSRCRSListParameters | OSRCRSListParameters
| Structure to describe optional parameters to OSRGetCRSInfoListFromDatabase()
typedef struct OGRCoordinateTransformationOptions * | OGRCoordinateTransformationOptionsH
| Coordinate transformation options.

## Enumerations
enum | OGRAxisOrientation { OAO_Other = 0 , OAO_North = 1 , OAO_South = 2 , OAO_East = 3 , OAO_West = 4 , OAO_Up = 5 , OAO_Down = 6 }
| Axis orientations (corresponds to CS_AxisOrientationEnum). More...
enum | OSRAxisMappingStrategy { OAMS_TRADITIONAL_GIS_ORDER , OAMS_AUTHORITY_COMPLIANT , OAMS_CUSTOM }
| Data axis to CRS axis mapping strategy. More...
enum | OSRCRSType { OSR_CRS_TYPE_GEOGRAPHIC_2D , OSR_CRS_TYPE_GEOGRAPHIC_3D , OSR_CRS_TYPE_GEOCENTRIC , OSR_CRS_TYPE_PROJECTED , OSR_CRS_TYPE_VERTICAL , OSR_CRS_TYPE_COMPOUND , OSR_CRS_TYPE_OTHER }
| Type of Coordinate Reference System (CRS). More...

## Functions
const char * | OSRAxisEnumToName (OGRAxisOrientation eOrientation)
| Return the string representation for the OGRAxisOrientation enumeration.
void | OSRSetPROJSearchPaths (const char *const *papszPaths)
| Set the search path(s) for PROJ resource files.
char ** | OSRGetPROJSearchPaths (void)
| Get the search path(s) for PROJ resource files.
void | OSRSetPROJAuxDbPaths (const char *const *papszPaths)
| Set list of PROJ auxiliary database filenames.
char ** | OSRGetPROJAuxDbPaths (void)
| Get PROJ auxiliary database filenames.
void | OSRSetPROJEnableNetwork (int enabled)
| Enable or disable PROJ networking capabilities.
int | OSRGetPROJEnableNetwork (void)
| Get whether PROJ networking capabilities are enabled.
void | OSRGetPROJVersion (int *pnMajor, int *pnMinor, int *pnPatch)
| Get the PROJ version.
OGRSpatialReferenceH | OSRNewSpatialReference (const char *)
| Constructor.
OGRSpatialReferenceH | OSRCloneGeogCS (OGRSpatialReferenceH)
| Make a duplicate of the GEOGCS node of this OGRSpatialReference object.
OGRSpatialReferenceH | OSRClone (OGRSpatialReferenceH)
| Make a duplicate of this OGRSpatialReference.
void | OSRDestroySpatialReference (OGRSpatialReferenceH)
| OGRSpatialReference destructor.
int | OSRReference (OGRSpatialReferenceH)
| Increments the reference count by one.
int | OSRDereference (OGRSpatialReferenceH)
| Decrements the reference count by one.
void | OSRRelease (OGRSpatialReferenceH)
| Decrements the reference count by one, and destroy if zero.
OGRErr | OSRValidate (OGRSpatialReferenceH)
| Validate SRS tokens.
OGRErr | OSRImportFromEPSG (OGRSpatialReferenceH, int)
| Initialize SRS based on EPSG geographic, projected or vertical CRS code.
OGRErr | OSRImportFromEPSGA (OGRSpatialReferenceH, int)
| Initialize SRS based on EPSG geographic, projected or vertical CRS code.
OGRErr | OSRImportFromWkt (OGRSpatialReferenceH, char **)
| Import from WKT string.
OGRErr | OSRImportFromProj4 (OGRSpatialReferenceH, const char *)
| Import PROJ coordinate string.
OGRErr | OSRImportFromESRI (OGRSpatialReferenceH, char **)
| Import coordinate system from ESRI .prj format(s).
OGRErr | OSRImportFromPCI (OGRSpatialReferenceH hSRS, const char *, const char *, double *)
| Import coordinate system from PCI projection definition.
OGRErr | OSRImportFromUSGS (OGRSpatialReferenceH, long, long, double *, long)
| Import coordinate system from USGS projection definition.
OGRErr | OSRImportFromXML (OGRSpatialReferenceH, const char *)
| Import coordinate system from XML format (GML only currently).
OGRErr | OSRImportFromDict (OGRSpatialReferenceH, const char *, const char *)
| Read SRS from WKT dictionary.
OGRErr | OSRImportFromPanorama (OGRSpatialReferenceH, long, long, long, double *)
| Import coordinate system from "Panorama" GIS projection definition.
OGRErr | OSRImportFromOzi (OGRSpatialReferenceH, const char *const *)
| Import coordinate system from OziExplorer projection definition.
OGRErr | OSRImportFromMICoordSys (OGRSpatialReferenceH, const char *)
| Import Mapinfo style CoordSys definition.
OGRErr | OSRImportFromERM (OGRSpatialReferenceH, const char *, const char *, const char *)
| Create OGR WKT from ERMapper projection definitions.
OGRErr | OSRImportFromUrl (OGRSpatialReferenceH, const char *)
| Set spatial reference from a URL.
OGRErr | OSRImportFromCF1 (OGRSpatialReferenceH, CSLConstList papszKeyValues, const char *pszUnits)
| Import a CRS from netCDF CF-1 definitions.
OGRErr | OSRExportToWkt (OGRSpatialReferenceH, char **)
| Convert this SRS into WKT 1 format.
OGRErr | OSRExportToWktEx (OGRSpatialReferenceH, char **ppszResult, const char *const *papszOptions)
| Convert this SRS into WKT format.
OGRErr | OSRExportToPrettyWkt (OGRSpatialReferenceH, char **, int)
| Convert this SRS into a nicely formatted WKT 1 string for display to a person.
OGRErr | OSRExportToPROJJSON (OGRSpatialReferenceH hSRS, char **ppszReturn, const char *const *papszOptions)
| Convert this SRS into PROJJSON format.
OGRErr | OSRExportToProj4 (OGRSpatialReferenceH, char **)
| Export coordinate system in PROJ.4 legacy format.
OGRErr | OSRExportToPCI (OGRSpatialReferenceH, char **, char **, double **)
| Export coordinate system in PCI projection definition.
OGRErr | OSRExportToUSGS (OGRSpatialReferenceH, long *, long *, double **, long *)
| Export coordinate system in USGS GCTP projection definition.
OGRErr | OSRExportToXML (OGRSpatialReferenceH, char **, const char *)
| Export coordinate system in XML format.
OGRErr | OSRExportToPanorama (OGRSpatialReferenceH, long *, long *, long *, long *, double *)
| Export coordinate system in "Panorama" GIS projection definition.
OGRErr | OSRExportToMICoordSys (OGRSpatialReferenceH, char **)
| Export coordinate system in Mapinfo style CoordSys format.
OGRErr | OSRExportToERM (OGRSpatialReferenceH, char *, char *, char *)
| Convert coordinate system to ERMapper format.
OGRErr | OSRExportToCF1 (OGRSpatialReferenceH, char **ppszGridMappingName, char ***ppapszKeyValues, char **ppszUnits, CSLConstList papszOptions)
| Export a CRS to netCDF CF-1 definitions.
OGRErr | OSRMorphToESRI (OGRSpatialReferenceH)
| Convert in place to ESRI WKT format.
OGRErr | OSRMorphFromESRI (OGRSpatialReferenceH)
| Convert in place from ESRI WKT format.
OGRErr | OSRStripVertical (OGRSpatialReferenceH)
| Convert a compound cs into a horizontal CS.
OGRSpatialReferenceH | OSRConvertToOtherProjection (OGRSpatialReferenceH hSRS, const char *pszTargetProjection, const char *const *papszOptions)
| Convert to another equivalent projection.
const char * | OSRGetName (OGRSpatialReferenceH hSRS)
| Return the CRS name.
OGRErr | OSRSetAttrValue (OGRSpatialReferenceH hSRS, const char *pszNodePath, const char *pszNewNodeValue)
| Set attribute value in spatial reference.
const char * | OSRGetAttrValue (OGRSpatialReferenceH hSRS, const char *pszName, int iChild)
| Fetch indicated attribute of named node.
OGRErr | OSRSetAngularUnits (OGRSpatialReferenceH, const char *, double)
| Set the angular units for the geographic coordinate system.
double | OSRGetAngularUnits (OGRSpatialReferenceH, char **)
| Fetch angular geographic coordinate system units.
OGRErr | OSRSetLinearUnits (OGRSpatialReferenceH, const char *, double)
| Set the linear units for the projection.
OGRErr | OSRSetTargetLinearUnits (OGRSpatialReferenceH, const char *, const char *, double)
| Set the linear units for the target node.
OGRErr | OSRSetLinearUnitsAndUpdateParameters (OGRSpatialReferenceH, const char *, double)
| Set the linear units for the projection.
double | OSRGetLinearUnits (OGRSpatialReferenceH, char **)
| Fetch linear projection units.
double | OSRGetTargetLinearUnits (OGRSpatialReferenceH, const char *, char **)
| Fetch linear projection units.
double | OSRGetPrimeMeridian (OGRSpatialReferenceH, char **)
| Fetch prime meridian info.
int | OSRIsGeographic (OGRSpatialReferenceH)
| Check if geographic coordinate system.
int | OSRIsDerivedGeographic (OGRSpatialReferenceH)
| Check if the CRS is a derived geographic coordinate system.
int | OSRIsLocal (OGRSpatialReferenceH)
| Check if local coordinate system.
int | OSRIsProjected (OGRSpatialReferenceH)
| Check if projected coordinate system.
int | OSRIsDerivedProjected (OGRSpatialReferenceH)
| Check if the CRS is a derived projected coordinate system.
int | OSRIsCompound (OGRSpatialReferenceH)
| Check if the coordinate system is compound.
int | OSRIsGeocentric (OGRSpatialReferenceH)
| Check if geocentric coordinate system.
int | OSRIsVertical (OGRSpatialReferenceH)
| Check if vertical coordinate system.
int | OSRIsDynamic (OGRSpatialReferenceH)
| Check if a CRS is a dynamic CRS.
int | OSRHasPointMotionOperation (OGRSpatialReferenceH)
| Check if a CRS has at least an associated point motion operation.
int | OSRIsSameGeogCS (OGRSpatialReferenceH, OGRSpatialReferenceH)
| Do the GeogCS'es match?
int | OSRIsSameVertCS (OGRSpatialReferenceH, OGRSpatialReferenceH)
| Do the VertCS'es match?
int | OSRIsSame (OGRSpatialReferenceH, OGRSpatialReferenceH)
| Do these two spatial references describe the same system ?
int | OSRIsSameEx (OGRSpatialReferenceH, OGRSpatialReferenceH, const char *const *papszOptions)
| Do these two spatial references describe the same system ?
void | OSRSetCoordinateEpoch (OGRSpatialReferenceH hSRS, double dfCoordinateEpoch)
| Set the coordinate epoch, as decimal year.
double | OSRGetCoordinateEpoch (OGRSpatialReferenceH hSRS)
| Get the coordinate epoch, as decimal year.
OGRErr | OSRSetLocalCS (OGRSpatialReferenceH hSRS, const char *pszName)
| Set the user visible LOCAL_CS name.
OGRErr | OSRSetProjCS (OGRSpatialReferenceH hSRS, const char *pszName)
| Set the user visible PROJCS name.
OGRErr | OSRSetGeocCS (OGRSpatialReferenceH hSRS, const char *pszName)
| Set the user visible PROJCS name.
OGRErr | OSRSetWellKnownGeogCS (OGRSpatialReferenceH hSRS, const char *pszName)
| Set a GeogCS based on well known name.
OGRErr | OSRSetFromUserInput (OGRSpatialReferenceH hSRS, const char *)
| Set spatial reference from various text formats.
OGRErr | OSRSetFromUserInputEx (OGRSpatialReferenceH hSRS, const char *, CSLConstList papszOptions)
| Set spatial reference from various text formats.
OGRErr | OSRCopyGeogCSFrom (OGRSpatialReferenceH hSRS, const OGRSpatialReferenceH hSrcSRS)
| Copy GEOGCS from another OGRSpatialReference.
OGRErr | OSRSetTOWGS84 (OGRSpatialReferenceH hSRS, double, double, double, double, double, double, double)
| Set the Bursa-Wolf conversion to WGS84.
OGRErr | OSRGetTOWGS84 (OGRSpatialReferenceH hSRS, double *, int)
| Fetch TOWGS84 parameters, if available.
OGRErr | OSRAddGuessedTOWGS84 (OGRSpatialReferenceH hSRS)
| Try to add a a 3-parameter or 7-parameter Helmert transformation to WGS84.
OGRErr | OSRSetCompoundCS (OGRSpatialReferenceH hSRS, const char *pszName, OGRSpatialReferenceH hHorizSRS, OGRSpatialReferenceH hVertSRS)
| Setup a compound coordinate system.
OGRErr | OSRPromoteTo3D (OGRSpatialReferenceH hSRS, const char *pszName)
| "Promotes" a 2D CRS to a 3D CRS one.
OGRErr | OSRDemoteTo2D (OGRSpatialReferenceH hSRS, const char *pszName)
| "Demote" a 3D CRS to a 2D CRS one.
OGRErr | OSRSetGeogCS (OGRSpatialReferenceH hSRS, const char *pszGeogName, const char *pszDatumName, const char *pszEllipsoidName, double dfSemiMajor, double dfInvFlattening, const char *pszPMName, double dfPMOffset, const char *pszUnits, double dfConvertToRadians)
| Set geographic coordinate system.
OGRErr | OSRSetVertCS (OGRSpatialReferenceH hSRS, const char *pszVertCSName, const char *pszVertDatumName, int nVertDatumType)
| Setup the vertical coordinate system.
double | OSRGetSemiMajor (OGRSpatialReferenceH, OGRErr *)
| Get spheroid semi major axis.
double | OSRGetSemiMinor (OGRSpatialReferenceH, OGRErr *)
| Get spheroid semi minor axis.
double | OSRGetInvFlattening (OGRSpatialReferenceH, OGRErr *)
| Get spheroid inverse flattening.
OGRErr | OSRSetAuthority (OGRSpatialReferenceH hSRS, const char *pszTargetKey, const char *pszAuthority, int nCode)
| Set the authority for a node.
const char * | OSRGetAuthorityCode (OGRSpatialReferenceH hSRS, const char *pszTargetKey)
| Get the authority code for a node.
const char * | OSRGetAuthorityName (OGRSpatialReferenceH hSRS, const char *pszTargetKey)
| Get the authority name for a node.
int | OSRGetAreaOfUse (OGRSpatialReferenceH hSRS, double *pdfWestLongitudeDeg, double *pdfSouthLatitudeDeg, double *pdfEastLongitudeDeg, double *pdfNorthLatitudeDeg, const char **ppszAreaName)
| Return the area of use of the CRS.
OGRErr | OSRSetProjection (OGRSpatialReferenceH, const char *)
| Set a projection name.
OGRErr | OSRSetProjParm (OGRSpatialReferenceH, const char *, double)
| Set a projection parameter value.
double | OSRGetProjParm (OGRSpatialReferenceH hSRS, const char *pszParamName, double dfDefault, OGRErr *)
| Fetch a projection parameter value.
OGRErr | OSRSetNormProjParm (OGRSpatialReferenceH, const char *, double)
| Set a projection parameter with a normalized value.
double | OSRGetNormProjParm (OGRSpatialReferenceH hSRS, const char *pszParamName, double dfDefault, OGRErr *)
| This function is the same as OGRSpatialReference::
OGRErr | OSRSetUTM (OGRSpatialReferenceH hSRS, int nZone, int bNorth)
| Set UTM projection definition.
int | OSRGetUTMZone (OGRSpatialReferenceH hSRS, int *pbNorth)
| Get utm zone information.
OGRErr | OSRSetStatePlane (OGRSpatialReferenceH hSRS, int nZone, int bNAD83)
| Set State Plane projection definition.
OGRErr | OSRSetStatePlaneWithUnits (OGRSpatialReferenceH hSRS, int nZone, int bNAD83, const char *pszOverrideUnitName, double dfOverrideUnit)
| Set State Plane projection definition.
OGRErr | OSRAutoIdentifyEPSG (OGRSpatialReferenceH hSRS)
| Set EPSG authority info if possible.
OGRSpatialReferenceH * | OSRFindMatches (OGRSpatialReferenceH hSRS, char **papszOptions, int *pnEntries, int **ppanMatchConfidence)
| Try to identify a match between the passed SRS and a related SRS in a catalog.
void | OSRFreeSRSArray (OGRSpatialReferenceH *pahSRS)
| Free return of OSRIdentifyMatches()
int | OSREPSGTreatsAsLatLong (OGRSpatialReferenceH hSRS)
| This function returns TRUE if EPSG feels this geographic coordinate system should be treated as having lat/long coordinate ordering.
int | OSREPSGTreatsAsNorthingEasting (OGRSpatialReferenceH hSRS)
| This function returns TRUE if EPSG feels this projected coordinate system should be treated as having northing/easting coordinate ordering.
const char * | OSRGetAxis (OGRSpatialReferenceH hSRS, const char *pszTargetKey, int iAxis, OGRAxisOrientation *peOrientation)
| Fetch the orientation of one axis.
int | OSRGetAxesCount (OGRSpatialReferenceH hSRS)
| Return the number of axis of the coordinate system of the CRS.
OGRErr | OSRSetAxes (OGRSpatialReferenceH hSRS, const char *pszTargetKey, const char *pszXAxisName, OGRAxisOrientation eXAxisOrientation, const char *pszYAxisName, OGRAxisOrientation eYAxisOrientation)
| Set the axes for a coordinate system.
OSRAxisMappingStrategy | OSRGetAxisMappingStrategy (OGRSpatialReferenceH hSRS)
| Return the data axis to CRS axis mapping strategy.
void | OSRSetAxisMappingStrategy (OGRSpatialReferenceH hSRS, OSRAxisMappingStrategy strategy)
| Set the data axis to CRS axis mapping strategy.
const int * | OSRGetDataAxisToSRSAxisMapping (OGRSpatialReferenceH hSRS, int *pnCount)
| Return the data axis to SRS axis mapping.
OGRErr | OSRSetDataAxisToSRSAxisMapping (OGRSpatialReferenceH hSRS, int nMappingSize, const int *panMapping)
| Set a custom data axis to CRS axis mapping.
OGRErr | OSRSetACEA (OGRSpatialReferenceH hSRS, double dfStdP1, double dfStdP2, double dfCenterLat, double dfCenterLong, double dfFalseEasting, double dfFalseNorthing)
| Albers Conic Equal Area.
OGRErr | OSRSetAE (OGRSpatialReferenceH hSRS, double dfCenterLat, double dfCenterLong, double dfFalseEasting, double dfFalseNorthing)
| Azimuthal Equidistant.
OGRErr | OSRSetBonne (OGRSpatialReferenceH hSRS, double dfStandardParallel, double dfCentralMeridian, double dfFalseEasting, double dfFalseNorthing)
| Bonne.
OGRErr | OSRSetCEA (OGRSpatialReferenceH hSRS, double dfStdP1, double dfCentralMeridian, double dfFalseEasting, double dfFalseNorthing)
| Cylindrical Equal Area.
OGRErr | OSRSetCS (OGRSpatialReferenceH hSRS, double dfCenterLat, double dfCenterLong, double dfFalseEasting, double dfFalseNorthing)
| Cassini-Soldner.
OGRErr | OSRSetEC (OGRSpatialReferenceH hSRS, double dfStdP1, double dfStdP2, double dfCenterLat, double dfCenterLong, double dfFalseEasting, double dfFalseNorthing)
| Equidistant Conic.
OGRErr | OSRSetEckert (OGRSpatialReferenceH hSRS, int nVariation, double dfCentralMeridian, double dfFalseEasting, double dfFalseNorthing)
| Eckert I-VI.
OGRErr | OSRSetEckertIV (OGRSpatialReferenceH hSRS, double dfCentralMeridian, double dfFalseEasting, double dfFalseNorthing)
| Eckert IV.
OGRErr | OSRSetEckertVI (OGRSpatialReferenceH hSRS, double dfCentralMeridian, double dfFalseEasting, double dfFalseNorthing)
| Eckert VI.
OGRErr | OSRSetEquirectangular (OGRSpatialReferenceH hSRS, double dfCenterLat, double dfCenterLong, double dfFalseEasting, double dfFalseNorthing)
| Equirectangular.
OGRErr | OSRSetEquirectangular2 (OGRSpatialReferenceH hSRS, double dfCenterLat, double dfCenterLong, double dfPseudoStdParallel1, double dfFalseEasting, double dfFalseNorthing)
| Equirectangular generalized form.
OGRErr | OSRSetGS (OGRSpatialReferenceH hSRS, double dfCentralMeridian, double dfFalseEasting, double dfFalseNorthing)
| Gall Stereograpic.
OGRErr | OSRSetGH (OGRSpatialReferenceH hSRS, double dfCentralMeridian, double dfFalseEasting, double dfFalseNorthing)
| Goode Homolosine.
OGRErr | OSRSetIGH (OGRSpatialReferenceH hSRS)
| Interrupted Goode Homolosine.
OGRErr | OSRSetGEOS (OGRSpatialReferenceH hSRS, double dfCentralMeridian, double dfSatelliteHeight, double dfFalseEasting, double dfFalseNorthing)
| GEOS - Geostationary Satellite View.
OGRErr | OSRSetGaussSchreiberTMercator (OGRSpatialReferenceH hSRS, double dfCenterLat, double dfCenterLong, double dfScale, double dfFalseEasting, double dfFalseNorthing)
| Gauss Schreiber Transverse Mercator.
OGRErr | OSRSetGnomonic (OGRSpatialReferenceH hSRS, double dfCenterLat, double dfCenterLong, double dfFalseEasting, double dfFalseNorthing)
| Gnomonic.
OGRErr | OSRSetHOM (OGRSpatialReferenceH hSRS, double dfCenterLat, double dfCenterLong, double dfAzimuth, double dfRectToSkew, double dfScale, double dfFalseEasting, double dfFalseNorthing)
| Hotine Oblique Mercator using azimuth angle.
OGRErr | OSRSetHOMAC (OGRSpatialReferenceH hSRS, double dfCenterLat, double dfCenterLong, double dfAzimuth, double dfRectToSkew, double dfScale, double dfFalseEasting, double dfFalseNorthing)
| Set an Oblique Mercator projection using azimuth angle.
OGRErr | OSRSetHOM2PNO (OGRSpatialReferenceH hSRS, double dfCenterLat, double dfLat1, double dfLong1, double dfLat2, double dfLong2, double dfScale, double dfFalseEasting, double dfFalseNorthing)
| Hotine Oblique Mercator using two points on centerline.
OGRErr | OSRSetIWMPolyconic (OGRSpatialReferenceH hSRS, double dfLat1, double dfLat2, double dfCenterLong, double dfFalseEasting, double dfFalseNorthing)
| International Map of the World Polyconic.
OGRErr | OSRSetKrovak (OGRSpatialReferenceH hSRS, double dfCenterLat, double dfCenterLong, double dfAzimuth, double dfPseudoStdParallelLat, double dfScale, double dfFalseEasting, double dfFalseNorthing)
| Krovak Oblique Conic Conformal.
OGRErr | OSRSetLAEA (OGRSpatialReferenceH hSRS, double dfCenterLat, double dfCenterLong, double dfFalseEasting, double dfFalseNorthing)
| Lambert Azimuthal Equal-Area.
OGRErr | OSRSetLCC (OGRSpatialReferenceH hSRS, double dfStdP1, double dfStdP2, double dfCenterLat, double dfCenterLong, double dfFalseEasting, double dfFalseNorthing)
| Lambert Conformal Conic.
OGRErr | OSRSetLCC1SP (OGRSpatialReferenceH hSRS, double dfCenterLat, double dfCenterLong, double dfScale, double dfFalseEasting, double dfFalseNorthing)
| Lambert Conformal Conic 1SP.
OGRErr | OSRSetLCCB (OGRSpatialReferenceH hSRS, double dfStdP1, double dfStdP2, double dfCenterLat, double dfCenterLong, double dfFalseEasting, double dfFalseNorthing)
| Lambert Conformal Conic (Belgium)
OGRErr | OSRSetMC (OGRSpatialReferenceH hSRS, double dfCenterLat, double dfCenterLong, double dfFalseEasting, double dfFalseNorthing)
| Miller Cylindrical.
OGRErr | OSRSetMercator (OGRSpatialReferenceH hSRS, double dfCenterLat, double dfCenterLong, double dfScale, double dfFalseEasting, double dfFalseNorthing)
| Mercator.
OGRErr | OSRSetMercator2SP (OGRSpatialReferenceH hSRS, double dfStdP1, double dfCenterLat, double dfCenterLong, double dfFalseEasting, double dfFalseNorthing)
| Mercator 2SP.
OGRErr | OSRSetMollweide (OGRSpatialReferenceH hSRS, double dfCentralMeridian, double dfFalseEasting, double dfFalseNorthing)
| Mollweide.
OGRErr | OSRSetNZMG (OGRSpatialReferenceH hSRS, double dfCenterLat, double dfCenterLong, double dfFalseEasting, double dfFalseNorthing)
| New Zealand Map Grid.
OGRErr | OSRSetOS (OGRSpatialReferenceH hSRS, double dfOriginLat, double dfCMeridian, double dfScale, double dfFalseEasting, double dfFalseNorthing)
| Oblique Stereographic.
OGRErr | OSRSetOrthographic (OGRSpatialReferenceH hSRS, double dfCenterLat, double dfCenterLong, double dfFalseEasting, double dfFalseNorthing)
| Orthographic.
OGRErr | OSRSetPolyconic (OGRSpatialReferenceH hSRS, double dfCenterLat, double dfCenterLong, double dfFalseEasting, double dfFalseNorthing)
| Polyconic.
OGRErr | OSRSetPS (OGRSpatialReferenceH hSRS, double dfCenterLat, double dfCenterLong, double dfScale, double dfFalseEasting, double dfFalseNorthing)
| Polar Stereographic.
OGRErr | OSRSetRobinson (OGRSpatialReferenceH hSRS, double dfCenterLong, double dfFalseEasting, double dfFalseNorthing)
| Robinson.
OGRErr | OSRSetSinusoidal (OGRSpatialReferenceH hSRS, double dfCenterLong, double dfFalseEasting, double dfFalseNorthing)
| Sinusoidal.
OGRErr | OSRSetStereographic (OGRSpatialReferenceH hSRS, double dfCenterLat, double dfCenterLong, double dfScale, double dfFalseEasting, double dfFalseNorthing)
| Stereographic.
OGRErr | OSRSetSOC (OGRSpatialReferenceH hSRS, double dfLatitudeOfOrigin, double dfCentralMeridian, double dfFalseEasting, double dfFalseNorthing)
| Swiss Oblique Cylindrical.
OGRErr | OSRSetTM (OGRSpatialReferenceH hSRS, double dfCenterLat, double dfCenterLong, double dfScale, double dfFalseEasting, double dfFalseNorthing)
| Transverse Mercator.
OGRErr | OSRSetTMVariant (OGRSpatialReferenceH hSRS, const char *pszVariantName, double dfCenterLat, double dfCenterLong, double dfScale, double dfFalseEasting, double dfFalseNorthing)
| Transverse Mercator variant.
OGRErr | OSRSetTMG (OGRSpatialReferenceH hSRS, double dfCenterLat, double dfCenterLong, double dfFalseEasting, double dfFalseNorthing)
| Tunesia Mining Grid
OGRErr | OSRSetTMSO (OGRSpatialReferenceH hSRS, double dfCenterLat, double dfCenterLong, double dfScale, double dfFalseEasting, double dfFalseNorthing)
| Transverse Mercator (South Oriented)
OGRErr | OSRSetTPED (OGRSpatialReferenceH hSRS, double dfLat1, double dfLong1, double dfLat2, double dfLong2, double dfFalseEasting, double dfFalseNorthing)
| TPED (Two Point Equi Distant)
OGRErr | OSRSetVDG (OGRSpatialReferenceH hSRS, double dfCenterLong, double dfFalseEasting, double dfFalseNorthing)
| VanDerGrinten.
OGRErr | OSRSetWagner (OGRSpatialReferenceH hSRS, int nVariation, double dfCenterLat, double dfFalseEasting, double dfFalseNorthing)
| Wagner I – VII.
OGRErr | OSRSetQSC (OGRSpatialReferenceH hSRS, double dfCenterLat, double dfCenterLong)
| Quadrilateralized Spherical Cube.
OGRErr | OSRSetSCH (OGRSpatialReferenceH hSRS, double dfPegLat, double dfPegLong, double dfPegHeading, double dfPegHgt)
| Spherical, Cross-track, Height.
OGRErr | OSRSetVerticalPerspective (OGRSpatialReferenceH hSRS, double dfTopoOriginLat, double dfTopoOriginLon, double dfTopoOriginHeight, double dfViewPointHeight, double dfFalseEasting, double dfFalseNorthing)
| Vertical Perspective / Near-sided Perspective.
double | OSRCalcInvFlattening (double dfSemiMajor, double dfSemiMinor)
| Compute inverse flattening from semi-major and semi-minor axis.
double | OSRCalcSemiMinorFromInvFlattening (double dfSemiMajor, double dfInvFlattening)
| Compute semi-minor axis from semi-major axis and inverse flattening.
void | OSRCleanup (void)
| Cleanup cached SRS related memory.
OSRCRSInfo ** | OSRGetCRSInfoListFromDatabase (const char *pszAuthName, const OSRCRSListParameters *params, int *pnOutResultCount)
| Enumerate CRS objects from the database.
void | OSRDestroyCRSInfoList (OSRCRSInfo **list)
| Destroy the result returned by OSRGetCRSInfoListFromDatabase().
OGRCoordinateTransformationH | OCTNewCoordinateTransformation (OGRSpatialReferenceH hSourceSRS, OGRSpatialReferenceH hTargetSRS)
| Create transformation object.
OGRCoordinateTransformationOptionsH | OCTNewCoordinateTransformationOptions (void)
| Create coordinate transformation options.
int | OCTCoordinateTransformationOptionsSetOperation (OGRCoordinateTransformationOptionsH hOptions, const char *pszCO, int bReverseCO)
| Sets a coordinate operation.
int | OCTCoordinateTransformationOptionsSetAreaOfInterest (OGRCoordinateTransformationOptionsH hOptions, double dfWestLongitudeDeg, double dfSouthLatitudeDeg, double dfEastLongitudeDeg, double dfNorthLatitudeDeg)
| Sets an area of interest.
int | OCTCoordinateTransformationOptionsSetDesiredAccuracy (OGRCoordinateTransformationOptionsH hOptions, double dfAccuracy)
| Sets the desired accuracy for coordinate operations.
int | OCTCoordinateTransformationOptionsSetBallparkAllowed (OGRCoordinateTransformationOptionsH hOptions, int bAllowBallpark)
| Sets whether ballpark transformations are allowed.
int | OCTCoordinateTransformationOptionsSetOnlyBest (OGRCoordinateTransformationOptionsH hOptions, bool bOnlyBest)
| Sets whether only the "best" operation(s) should be used.
void | OCTDestroyCoordinateTransformationOptions (OGRCoordinateTransformationOptionsH)
| Destroy coordinate transformation options.
OGRCoordinateTransformationH | OCTNewCoordinateTransformationEx (OGRSpatialReferenceH hSourceSRS, OGRSpatialReferenceH hTargetSRS, OGRCoordinateTransformationOptionsH hOptions)
| Create transformation object.
OGRCoordinateTransformationH | OCTClone (OGRCoordinateTransformationH hTransform)
| Clone transformation object.
OGRSpatialReferenceH | OCTGetSourceCS (OGRCoordinateTransformationH hTransform)
| Transformation's source coordinate system reference.
OGRSpatialReferenceH | OCTGetTargetCS (OGRCoordinateTransformationH hTransform)
| Transformation's target coordinate system reference.
OGRCoordinateTransformationH | OCTGetInverse (OGRCoordinateTransformationH hTransform)
| Inverse transformation object.
void | OCTDestroyCoordinateTransformation (OGRCoordinateTransformationH)
| OGRCoordinateTransformation destructor.
int | OCTTransform (OGRCoordinateTransformationH hCT, int nCount, double *x, double *y, double *z)
| Transform an array of points.
int | OCTTransformEx (OGRCoordinateTransformationH hCT, int nCount, double *x, double *y, double *z, int *pabSuccess)
| Transform an array of points.
int | OCTTransform4D (OGRCoordinateTransformationH hCT, int nCount, double *x, double *y, double *z, double *t, int *pabSuccess)
| Transform an array of points.
int | OCTTransform4DWithErrorCodes (OGRCoordinateTransformationH hCT, int nCount, double *x, double *y, double *z, double *t, int *panErrorCodes)
| Transform an array of points.
int | OCTTransformBounds (OGRCoordinateTransformationH hCT, const double xmin, const double ymin, const double xmax, const double ymax, double *out_xmin, double *out_ymin, double *out_xmax, double *out_ymax, const int densify_pts)
| Transform boundary.

## Detailed Description

C spatial reference system services and defines.

See also: ogr_spatialref.h

## Macro Definition Documentation

## ◆ SRS_WKT_WGS84_LAT_LONG

#define SRS_WKT_WGS84_LAT_LONG

Value:
"GEOGCS[\"WGS 84\",DATUM[\"WGS_1984\",SPHEROID[\"WGS " \
"84\",6378137,298.257223563,AUTHORITY[\"EPSG\",\"7030\"]],AUTHORITY[" \
"\"EPSG\",\"6326\"]],PRIMEM[\"Greenwich\",0,AUTHORITY[\"EPSG\",\"8901\"]]" \
",UNIT[\"degree\",0.0174532925199433,AUTHORITY[\"EPSG\",\"9122\"]],AXIS[" \
"\"Latitude\",NORTH],AXIS[\"Longitude\",EAST],AUTHORITY[\"EPSG\"," \
"\"4326\"]]"

WGS 84 geodetic (lat/long) WKT / EPSG:4326 with lat,long ordering.

## Typedef Documentation

## ◆ OSRCRSListParameters

typedef struct OSRCRSListParameters OSRCRSListParameters

Structure to describe optional parameters to OSRGetCRSInfoListFromDatabase()

Unused for now.

## Enumeration Type Documentation

## ◆ OGRAxisOrientation

enum OGRAxisOrientation

Axis orientations (corresponds to CS_AxisOrientationEnum).

Enumerator
OAO_Other | Other.
OAO_North | North.
OAO_South | South.
OAO_East | East.
OAO_West | West.
OAO_Up | Up (to space)
OAO_Down | Down (to Earth center)

## ◆ OSRAxisMappingStrategy

enum OSRAxisMappingStrategy

Data axis to CRS axis mapping strategy.

Enumerator
OAMS_TRADITIONAL_GIS_ORDER | Traditional GIS order.
OAMS_AUTHORITY_COMPLIANT | Compliant with the order mandated by the CRS authority.
OAMS_CUSTOM | Custom.

## ◆ OSRCRSType

enum OSRCRSType

Type of Coordinate Reference System (CRS).

Enumerator
OSR_CRS_TYPE_GEOGRAPHIC_2D | Geographic 2D CRS.
OSR_CRS_TYPE_GEOGRAPHIC_3D | Geographic 3D CRS.
OSR_CRS_TYPE_GEOCENTRIC | Geocentric CRS.
OSR_CRS_TYPE_PROJECTED | Projected CRS.
OSR_CRS_TYPE_VERTICAL | Vertical CRS.
OSR_CRS_TYPE_COMPOUND | Compound CRS.
OSR_CRS_TYPE_OTHER | Other.

## Function Documentation

## ◆ OCTClone()

OGRCoordinateTransformationH OCTClone | ( | OGRCoordinateTransformationH | hTransform | ) |

Clone transformation object.

This is the same as the C++ function OGRCreateCoordinateTransformation::Clone

Returns
  handle to transformation's clone or NULL on error, must be freed with OCTDestroyCoordinateTransformation

Since
  GDAL 3.4

## ◆ OCTCoordinateTransformationOptionsSetAreaOfInterest()

int OCTCoordinateTransformationOptionsSetAreaOfInterest | ( | OGRCoordinateTransformationOptionsH | hOptions,
|  | double | dfWestLongitudeDeg,
|  | double | dfSouthLatitudeDeg,
|  | double | dfEastLongitudeDeg,
|  | double | dfNorthLatitudeDeg
| ) |  |

Sets an area of interest.

See OGRCoordinateTransformationOptions::SetAreaOfInterest()

Since
  GDAL 3.0

## ◆ OCTCoordinateTransformationOptionsSetBallparkAllowed()

int OCTCoordinateTransformationOptionsSetBallparkAllowed | ( | OGRCoordinateTransformationOptionsH | hOptions,
|  | int | bAllowBallpark
| ) |  |

Sets whether ballpark transformations are allowed.

See OGRCoordinateTransformationOptions::SetDesiredAccuracy()

Since
  GDAL 3.3 and PROJ 8

## ◆ OCTCoordinateTransformationOptionsSetDesiredAccuracy()

int OCTCoordinateTransformationOptionsSetDesiredAccuracy | ( | OGRCoordinateTransformationOptionsH | hOptions,
|  | double | dfAccuracy
| ) |  |

Sets the desired accuracy for coordinate operations.

See OGRCoordinateTransformationOptions::SetDesiredAccuracy()

Since
  GDAL 3.3

## ◆ OCTCoordinateTransformationOptionsSetOnlyBest()

int OCTCoordinateTransformationOptionsSetOnlyBest | ( | OGRCoordinateTransformationOptionsH | hOptions,
|  | bool | bOnlyBest
| ) |  |

Sets whether only the "best" operation(s) should be used.

See OGRCoordinateTransformationOptions::SetOnlyBest()

Since
  GDAL 3.8 and PROJ 9.2

## ◆ OCTCoordinateTransformationOptionsSetOperation()

int OCTCoordinateTransformationOptionsSetOperation | ( | OGRCoordinateTransformationOptionsH | hOptions,
|  | const char * | pszCO,
|  | int | bReverseCO
| ) |  |

Sets a coordinate operation.

See OGRCoordinateTransformationOptions::SetCoordinateTransformation()

Since
  GDAL 3.0

## ◆ OCTDestroyCoordinateTransformation()

void OCTDestroyCoordinateTransformation | ( | OGRCoordinateTransformationH | hCT | ) |

OGRCoordinateTransformation destructor.

This function is the same as OGRCoordinateTransformation::DestroyCT()

Parameters

  hCT | the object to delete

## ◆ OCTDestroyCoordinateTransformationOptions()

void OCTDestroyCoordinateTransformationOptions | ( | OGRCoordinateTransformationOptionsH | hOptions | ) |

Destroy coordinate transformation options.

Since
  GDAL 3.0

## ◆ OCTGetInverse()

OGRCoordinateTransformationH OCTGetInverse | ( | OGRCoordinateTransformationH | hTransform | ) |

Inverse transformation object.

This is the same as the C++ function OGRCreateCoordinateTransformation::GetInverse

Returns
  handle to inverse transformation or NULL on error, must be freed with OCTDestroyCoordinateTransformation

Since
  GDAL 3.4

## ◆ OCTGetSourceCS()

OGRSpatialReferenceH OCTGetSourceCS | ( | OGRCoordinateTransformationH | hTransform | ) |

Transformation's source coordinate system reference.

This is the same as the C++ function OGRCreateCoordinateTransformation::GetSourceCS

Returns
  handle to transformation's source coordinate system or NULL if not present.

The ownership of the returned SRS belongs to the transformation object, and the returned SRS should not be modified.

Since
  GDAL 3.4

## ◆ OCTGetTargetCS()

OGRSpatialReferenceH OCTGetTargetCS | ( | OGRCoordinateTransformationH | hTransform | ) |

Transformation's target coordinate system reference.

This is the same as the C++ function OGRCreateCoordinateTransformation::GetTargetCS

Returns
  handle to transformation's target coordinate system or NULL if not present.

The ownership of the returned SRS belongs to the transformation object, and the returned SRS should not be modified.

Since
  GDAL 3.4

## ◆ OCTNewCoordinateTransformation()

OGRCoordinateTransformationH OCTNewCoordinateTransformation | ( | OGRSpatialReferenceH | hSourceSRS,
|  | OGRSpatialReferenceH | hTargetSRS
| ) |  |

Create transformation object.

This is the same as the C++ function OGRCreateCoordinateTransformation(const OGRSpatialReference *, const OGRSpatialReference *)

Input spatial reference system objects are assigned by copy (calling clone() method) and no ownership transfer occurs.

OCTDestroyCoordinateTransformation() should be used to destroy transformation objects.

This will honour the axis order advertized by the source and target SRS, as well as their "data axis to SRS axis mapping". To have a behavior similar to GDAL < 3.0, the OGR_CT_FORCE_TRADITIONAL_GIS_ORDER configuration option can be set to YES.

Parameters

  hSourceSRS | source spatial reference system.
  hTargetSRS | target spatial reference system.

Returns
  NULL on failure or a ready to use transformation object.

## ◆ OCTNewCoordinateTransformationEx()

OGRCoordinateTransformationH OCTNewCoordinateTransformationEx | ( | OGRSpatialReferenceH | hSourceSRS,
|  | OGRSpatialReferenceH | hTargetSRS,
|  | OGRCoordinateTransformationOptionsH | hOptions
| ) |  |

Create transformation object.

This is the same as the C++ function OGRCreateCoordinateTransformation(const OGRSpatialReference *, const OGRSpatialReference *, const OGRCoordinateTransformationOptions& )

Input spatial reference system objects are assigned by copy (calling clone() method) and no ownership transfer occurs.

OCTDestroyCoordinateTransformation() should be used to destroy transformation objects.

The source SRS and target SRS should generally not be NULL. This is only allowed if a custom coordinate operation is set through the hOptions argument.

This will honour the axis order advertized by the source and target SRS, as well as their "data axis to SRS axis mapping". To have a behavior similar to GDAL < 3.0, the OGR_CT_FORCE_TRADITIONAL_GIS_ORDER configuration option can be set to YES.

If options contains a user defined coordinate transformation pipeline, it will be unconditionally used. If options has an area of interest defined, it will be used to research the best fitting coordinate transformation (which will be used for all coordinate transformations, even if they don't fall into the declared area of interest) If no options are set, then a list of candidate coordinate operations will be researched, and at each call to Transform(), the best of those candidate regarding the centroid of the coordinate set will be dynamically selected.

Parameters

  hSourceSRS | source spatial reference system.
  hTargetSRS | target spatial reference system.
  hOptions | Coordinate transformation options.

Returns
  NULL on failure or a ready to use transformation object.

Since
  GDAL 3.0

## ◆ OCTNewCoordinateTransformationOptions()

OGRCoordinateTransformationOptionsH OCTNewCoordinateTransformationOptions | ( | void |  | ) |

Create coordinate transformation options.

To be freed with OCTDestroyCoordinateTransformationOptions()

Since
  GDAL 3.0

## ◆ OCTTransform()

int OCTTransform | ( | OGRCoordinateTransformationH | hTransform,
|  | int | nCount,
|  | double * | x,
|  | double * | y,
|  | double * | z
| ) |  |

Transform an array of points.

Parameters

  hTransform | Transformation object
  nCount | Number of points
  x | Array of nCount x values.
  y | Array of nCount y values.
  z | Array of nCount z values.

Returns
  TRUE if a transformation could be found (but not all points may have necessarily succeed to transform), otherwise FALSE.

## ◆ OCTTransform4D()

int OCTTransform4D | ( | OGRCoordinateTransformationH | hTransform,
|  | int | nCount,
|  | double * | x,
|  | double * | y,
|  | double * | z,
|  | double * | t,
|  | int * | pabSuccess
| ) |  |

Transform an array of points.

Parameters

  hTransform | Transformation object
  nCount | Number of points
  x | Array of nCount x values. Should not be NULL
  y | Array of nCount y values. Should not be NULL
  z | Array of nCount z values. Might be NULL
  t | Array of nCount time values. Might be NULL
  pabSuccess | Output array of nCount value that will be set to TRUE/FALSE. Might be NULL.

Since
  GDAL 3.0

Returns
  TRUE if a transformation could be found (but not all points may have necessarily succeed to transform), otherwise FALSE.

## ◆ OCTTransform4DWithErrorCodes()

int OCTTransform4DWithErrorCodes | ( | OGRCoordinateTransformationH | hTransform,
|  | int | nCount,
|  | double * | x,
|  | double * | y,
|  | double * | z,
|  | double * | t,
|  | int * | panErrorCodes
| ) |  |

Transform an array of points.

Parameters

  hTransform | Transformation object
  nCount | Number of points
  x | Array of nCount x values. Should not be NULL
  y | Array of nCount y values. Should not be NULL
  z | Array of nCount z values. Might be NULL
  t | Array of nCount time values. Might be NULL
  panErrorCodes | Output array of nCount value that will be set to 0 for success, or a non-zero value for failure. Refer to PROJ 8 public error codes. Might be NULL

Since
  GDAL 3.3, and PROJ 8 to be able to use PROJ public error codes

Returns
  TRUE if a transformation could be found (but not all points may have necessarily succeed to transform), otherwise FALSE.

## ◆ OCTTransformBounds()

int OCTTransformBounds | ( | OGRCoordinateTransformationH | hTransform,
|  | const double | xmin,
|  | const double | ymin,
|  | const double | xmax,
|  | const double | ymax,
|  | double * | out_xmin,
|  | double * | out_ymin,
|  | double * | out_xmax,
|  | double * | out_ymax,
|  | int | densify_pts
| ) |  |

Transform boundary.

Transform boundary densifying the edges to account for nonlinear transformations along these edges and extracting the outermost bounds.

If the destination CRS is geographic, the first axis is longitude, and xmax < xmin then the bounds crossed the antimeridian. In this scenario there are two polygons, one on each side of the antimeridian. The first polygon should be constructed with (xmin, ymin, 180, ymax) and the second with (-180, ymin, xmax, ymax).

If the destination CRS is geographic, the first axis is latitude, and ymax < ymin then the bounds crossed the antimeridian. In this scenario there are two polygons, one on each side of the antimeridian. The first polygon should be constructed with (ymin, xmin, ymax, 180) and the second with (ymin, -180, ymax, xmax).

Parameters

  hTransform | Transformation object
  xmin | Minimum bounding coordinate of the first axis in source CRS.
  ymin | Minimum bounding coordinate of the second axis in source CRS.
  xmax | Maximum bounding coordinate of the first axis in source CRS.
  ymax | Maximum bounding coordinate of the second axis in source CRS.
  out_xmin | Minimum bounding coordinate of the first axis in target CRS
  out_ymin | Minimum bounding coordinate of the second axis in target CRS.
  out_xmax | Maximum bounding coordinate of the first axis in target CRS.
  out_ymax | Maximum bounding coordinate of the second axis in target CRS.
  densify_pts | Recommended to use 21. This is the number of points to use to densify the bounding polygon in the transformation.

Returns
  TRUE if successful. FALSE if failures encountered.

Since
  3.4

## ◆ OCTTransformEx()

int OCTTransformEx | ( | OGRCoordinateTransformationH | hTransform,
|  | int | nCount,
|  | double * | x,
|  | double * | y,
|  | double * | z,
|  | int * | pabSuccess
| ) |  |

Transform an array of points.

Parameters

  hTransform | Transformation object
  nCount | Number of points
  x | Array of nCount x values.
  y | Array of nCount y values.
  z | Array of nCount z values.
  pabSuccess | Output array of nCount value that will be set to TRUE/FALSE

Returns
  TRUE if a transformation could be found (but not all points may have necessarily succeed to transform), otherwise FALSE.

## ◆ OSRAddGuessedTOWGS84()

OGRErr OSRAddGuessedTOWGS84 | ( | OGRSpatialReferenceH | hSRS | ) |

Try to add a a 3-parameter or 7-parameter Helmert transformation to WGS84.

This function is the same as OGRSpatialReference::AddGuessedTOWGS84().

Since
  GDAL 3.0.3

## ◆ OSRAutoIdentifyEPSG()

OGRErr OSRAutoIdentifyEPSG | ( | OGRSpatialReferenceH | hSRS | ) |

Set EPSG authority info if possible.

This function is the same as OGRSpatialReference::AutoIdentifyEPSG().

Since GDAL 2.3, the OSRFindMatches() function can also be used for improved matching by researching the EPSG catalog.

## ◆ OSRAxisEnumToName()

const char * OSRAxisEnumToName | ( | OGRAxisOrientation | eOrientation | ) |

Return the string representation for the OGRAxisOrientation enumeration.

For example "NORTH" for OAO_North.

Returns
  an internal string

## ◆ OSRCalcInvFlattening()

double OSRCalcInvFlattening | ( | double | dfSemiMajor,
|  | double | dfSemiMinor
| ) |  |

Compute inverse flattening from semi-major and semi-minor axis.

Parameters

  dfSemiMajor | Semi-major axis length.
  dfSemiMinor | Semi-minor axis length.

Returns
  inverse flattening, or 0 if both axis are equal.

Since
  GDAL 2.0

## ◆ OSRCalcSemiMinorFromInvFlattening()

double OSRCalcSemiMinorFromInvFlattening | ( | double | dfSemiMajor,
|  | double | dfInvFlattening
| ) |  |

Compute semi-minor axis from semi-major axis and inverse flattening.

Parameters

  dfSemiMajor | Semi-major axis length.
  dfInvFlattening | Inverse flattening or 0 for sphere.

Returns
  semi-minor axis

Since
  GDAL 2.0

## ◆ OSRCleanup()

void OSRCleanup | ( | void |  | ) |

Cleanup cached SRS related memory.

This function will attempt to cleanup any cache spatial reference related information, such as cached tables of coordinate systems.

This function should not be called concurrently with any other GDAL/OGR function. It is meant at being called once before process termination (typically from the main thread). CPLCleanupTLS() might be used to clean thread-specific resources before thread termination.

## ◆ OSRClone()

OGRSpatialReferenceH OSRClone | ( | OGRSpatialReferenceH | hSRS | ) |

Make a duplicate of this OGRSpatialReference.

This function is the same as OGRSpatialReference::Clone()

## ◆ OSRCloneGeogCS()

OGRSpatialReferenceH OSRCloneGeogCS | ( | OGRSpatialReferenceH | hSource | ) |

Make a duplicate of the GEOGCS node of this OGRSpatialReference object.

This function is the same as OGRSpatialReference::CloneGeogCS().

## ◆ OSRConvertToOtherProjection()

OGRSpatialReferenceH OSRConvertToOtherProjection | ( | OGRSpatialReferenceH | hSRS,
|  | const char * | pszTargetProjection,
|  | const char *const * | papszOptions
| ) |  |

Convert to another equivalent projection.

Currently implemented:

- SRS_PT_MERCATOR_1SP to SRS_PT_MERCATOR_2SP
- SRS_PT_MERCATOR_2SP to SRS_PT_MERCATOR_1SP
- SRS_PT_LAMBERT_CONFORMAL_CONIC_1SP to SRS_PT_LAMBERT_CONFORMAL_CONIC_2SP
- SRS_PT_LAMBERT_CONFORMAL_CONIC_2SP to SRS_PT_LAMBERT_CONFORMAL_CONIC_1SP

Parameters

  hSRS | source SRS
  pszTargetProjection | target projection.
  papszOptions | lists of options. None supported currently.

Returns
  a new SRS, or NULL in case of error.

Since
  GDAL 2.3

## ◆ OSRCopyGeogCSFrom()

OGRErr OSRCopyGeogCSFrom | ( | OGRSpatialReferenceH | hSRS,
|  | const OGRSpatialReferenceH | hSrcSRS
| ) |  |

Copy GEOGCS from another OGRSpatialReference.

This function is the same as OGRSpatialReference::CopyGeogCSFrom()

## ◆ OSRDemoteTo2D()

OGRErr OSRDemoteTo2D | ( | OGRSpatialReferenceH | hSRS,
|  | const char * | pszName
| ) |  |

"Demote" a 3D CRS to a 2D CRS one.

See OGRSpatialReference::DemoteTo2D()

Since
  GDAL 3.2 and PROJ 6.3

## ◆ OSRDereference()

int OSRDereference | ( | OGRSpatialReferenceH | hSRS | ) |

Decrements the reference count by one.

This function is the same as OGRSpatialReference::Dereference()

## ◆ OSRDestroyCRSInfoList()

void OSRDestroyCRSInfoList | ( | OSRCRSInfo ** | list | ) |

Destroy the result returned by OSRGetCRSInfoListFromDatabase().

Since
  GDAL 3.0

## ◆ OSRDestroySpatialReference()

void OSRDestroySpatialReference | ( | OGRSpatialReferenceH | hSRS | ) |

OGRSpatialReference destructor.

This function is the same as OGRSpatialReference::~OGRSpatialReference() and OGRSpatialReference::DestroySpatialReference()

Parameters

  hSRS | the object to delete

## ◆ OSREPSGTreatsAsLatLong()

int OSREPSGTreatsAsLatLong | ( | OGRSpatialReferenceH | hSRS | ) |

This function returns TRUE if EPSG feels this geographic coordinate system should be treated as having lat/long coordinate ordering.

This function is the same as OGRSpatialReference::OSREPSGTreatsAsLatLong().

## ◆ OSREPSGTreatsAsNorthingEasting()

int OSREPSGTreatsAsNorthingEasting | ( | OGRSpatialReferenceH | hSRS | ) |

This function returns TRUE if EPSG feels this projected coordinate system should be treated as having northing/easting coordinate ordering.

This function is the same as OGRSpatialReference::EPSGTreatsAsNorthingEasting().

Since
  OGR 1.10.0

## ◆ OSRExportToCF1()

OGRErr OSRExportToCF1 | ( | OGRSpatialReferenceH | hSRS,
|  | char ** | ppszGridMappingName,
|  | char *** | ppapszKeyValues,
|  | char ** | ppszUnits,
|  | CSLConstList | papszOptions
| ) |  |

Export a CRS to netCDF CF-1 definitions.

This function is the same as OGRSpatialReference::exportToCF1().

## ◆ OSRExportToERM()

OGRErr OSRExportToERM | ( | OGRSpatialReferenceH | hSRS,
|  | char * | pszProj,
|  | char * | pszDatum,
|  | char * | pszUnits
| ) |  |

Convert coordinate system to ERMapper format.

This function is the same as OGRSpatialReference::exportToERM().

## ◆ OSRExportToMICoordSys()

OGRErr OSRExportToMICoordSys | ( | OGRSpatialReferenceH | hSRS,
|  | char ** | ppszReturn
| ) |  |

Export coordinate system in Mapinfo style CoordSys format.

This method is the equivalent of the C++ method OGRSpatialReference::exportToMICoordSys

## ◆ OSRExportToPanorama()

OGRErr OSRExportToPanorama | ( | OGRSpatialReferenceH | hSRS,
|  | long * | piProjSys,
|  | long * | piDatum,
|  | long * | piEllips,
|  | long * | piZone,
|  | double * | padfPrjParams
| ) |  |

Export coordinate system in "Panorama" GIS projection definition.

See OGRSpatialReference::exportToPanorama()

## ◆ OSRExportToPCI()

OGRErr OSRExportToPCI | ( | OGRSpatialReferenceH | hSRS,
|  | char ** | ppszProj,
|  | char ** | ppszUnits,
|  | double ** | ppadfPrjParams
| ) |  |

Export coordinate system in PCI projection definition.

This function is the same as OGRSpatialReference::exportToPCI().

## ◆ OSRExportToPrettyWkt()

OGRErr OSRExportToPrettyWkt | ( | OGRSpatialReferenceH | hSRS,
|  | char ** | ppszReturn,
|  | int | bSimplify
| ) |  |

Convert this SRS into a nicely formatted WKT 1 string for display to a person.

The WKT version can be overridden by using the OSR_WKT_FORMAT configuration option. Valid values are the one of the FORMAT option of exportToWkt( char ** ppszResult, const char* const* papszOptions ) const

This function is the same as OGRSpatialReference::exportToPrettyWkt().

## ◆ OSRExportToProj4()

OGRErr OSRExportToProj4 | ( | OGRSpatialReferenceH | hSRS,
|  | char ** | ppszReturn
| ) |  |

Export coordinate system in PROJ.4 legacy format.

Warning
  Use of this function is discouraged. Its behavior in GDAL >= 3 / PROJ >= 6 is significantly different from earlier versions. In particular +datum will only encode WGS84, NAD27 and NAD83, and +towgs84/+nadgrids terms will be missing most of the time. PROJ strings to encode CRS should be considered as a legacy solution. Using a AUTHORITY:CODE or WKT representation is the recommended way.

This function is the same as OGRSpatialReference::exportToProj4().

## ◆ OSRExportToPROJJSON()

OGRErr OSRExportToPROJJSON | ( | OGRSpatialReferenceH | hSRS,
|  | char ** | ppszReturn,
|  | const char *const * | papszOptions
| ) |  |

Convert this SRS into PROJJSON format.

This function is the same as OGRSpatialReference::exportToPROJJSON() const

Since
  GDAL 3.1 and PROJ 6.2

## ◆ OSRExportToUSGS()

OGRErr OSRExportToUSGS | ( | OGRSpatialReferenceH | hSRS,
|  | long * | piProjSys,
|  | long * | piZone,
|  | double ** | ppadfPrjParams,
|  | long * | piDatum
| ) |  |

Export coordinate system in USGS GCTP projection definition.

This function is the same as OGRSpatialReference::exportToUSGS().

## ◆ OSRExportToWkt()

OGRErr OSRExportToWkt | ( | OGRSpatialReferenceH | hSRS,
|  | char ** | ppszReturn
| ) |  |

Convert this SRS into WKT 1 format.

Consult also the OGC WKT Coordinate System Issues page for implementation details of WKT in OGR.

The WKT version can be overridden by using the OSR_WKT_FORMAT configuration option. Valid values are the one of the FORMAT option of exportToWkt( char ** ppszResult, const char* const* papszOptions ) const

This function is the same as OGRSpatialReference::exportToWkt().

## ◆ OSRExportToWktEx()

OGRErr OSRExportToWktEx | ( | OGRSpatialReferenceH | hSRS,
|  | char ** | ppszReturn,
|  | const char *const * | papszOptions
| ) |  |

Convert this SRS into WKT format.

This function is the same as OGRSpatialReference::exportToWkt(char ** ppszResult,const char* const* papszOptions ) const

Since
  GDAL 3.0

## ◆ OSRExportToXML()

OGRErr OSRExportToXML | ( | OGRSpatialReferenceH | hSRS,
|  | char ** | ppszRawXML,
|  | const char * | pszDialect
| ) |  |

Export coordinate system in XML format.

This function is the same as OGRSpatialReference::exportToXML().

## ◆ OSRFindMatches()

OGRSpatialReferenceH * OSRFindMatches | ( | OGRSpatialReferenceH | hSRS,
|  | char ** | papszOptions,
|  | int * | pnEntries,
|  | int ** | ppanMatchConfidence
| ) |  |

Try to identify a match between the passed SRS and a related SRS in a catalog.

Matching may be partial, or may fail. Returned entries will be sorted by decreasing match confidence (first entry has the highest match confidence).

The exact way matching is done may change in future versions. Starting with GDAL 3.0, it relies on PROJ' proj_identify() function.

This function is the same as OGRSpatialReference::FindMatches().

Parameters

  hSRS | SRS to match
  papszOptions | NULL terminated list of options or NULL
  pnEntries | Output parameter. Number of values in the returned array.
  ppanMatchConfidence | Output parameter (or NULL). *ppanMatchConfidence will be allocated to an array of *pnEntries whose values between 0 and 100 indicate the confidence in the match. 100 is the highest confidence level. The array must be freed with CPLFree().

Returns
  an array of SRS that match the passed SRS, or NULL. Must be freed with OSRFreeSRSArray()

Since
  GDAL 2.3

## ◆ OSRFreeSRSArray()

void OSRFreeSRSArray | ( | OGRSpatialReferenceH * | pahSRS | ) |

Free return of OSRIdentifyMatches()

Parameters

  pahSRS | array of SRS (must be NULL terminated)

Since
  GDAL 2.3

## ◆ OSRGetAngularUnits()

double OSRGetAngularUnits | ( | OGRSpatialReferenceH | hSRS,
|  | char ** | ppszName
| ) |  |

Fetch angular geographic coordinate system units.

This function is the same as OGRSpatialReference::GetAngularUnits()

## ◆ OSRGetAreaOfUse()

int OSRGetAreaOfUse | ( | OGRSpatialReferenceH | hSRS,
|  | double * | pdfWestLongitudeDeg,
|  | double * | pdfSouthLatitudeDeg,
|  | double * | pdfEastLongitudeDeg,
|  | double * | pdfNorthLatitudeDeg,
|  | const char ** | ppszAreaName
| ) |  |

Return the area of use of the CRS.

This function is the same as the OGRSpatialReference::GetAreaOfUse() method.

Since
  GDAL 3.0

## ◆ OSRGetAttrValue()

const char * OSRGetAttrValue | ( | OGRSpatialReferenceH | hSRS,
|  | const char * | pszKey,
|  | int | iChild
| ) |  |

Fetch indicated attribute of named node.

This function is the same as OGRSpatialReference::GetAttrValue()

## ◆ OSRGetAuthorityCode()

const char * OSRGetAuthorityCode | ( | OGRSpatialReferenceH | hSRS,
|  | const char * | pszTargetKey
| ) |  |

Get the authority code for a node.

This function is the same as OGRSpatialReference::GetAuthorityCode().

## ◆ OSRGetAuthorityName()

const char * OSRGetAuthorityName | ( | OGRSpatialReferenceH | hSRS,
|  | const char * | pszTargetKey
| ) |  |

Get the authority name for a node.

This function is the same as OGRSpatialReference::GetAuthorityName().

## ◆ OSRGetAxesCount()

int OSRGetAxesCount | ( | OGRSpatialReferenceH | hSRS | ) |

Return the number of axis of the coordinate system of the CRS.

This method is the equivalent of the C++ method OGRSpatialReference::GetAxesCount()

Since
  GDAL 3.1

## ◆ OSRGetAxis()

const char * OSRGetAxis | ( | OGRSpatialReferenceH | hSRS,
|  | const char * | pszTargetKey,
|  | int | iAxis,
|  | OGRAxisOrientation * | peOrientation
| ) |  |

Fetch the orientation of one axis.

This method is the equivalent of the C++ method OGRSpatialReference::GetAxis

## ◆ OSRGetAxisMappingStrategy()

OSRAxisMappingStrategy OSRGetAxisMappingStrategy | ( | OGRSpatialReferenceH | hSRS | ) |

Return the data axis to CRS axis mapping strategy.

See OGRSpatialReference::GetAxisMappingStrategy()

Since
  GDAL 3.0

## ◆ OSRGetCoordinateEpoch()

double OSRGetCoordinateEpoch | ( | OGRSpatialReferenceH | hSRS | ) |

Get the coordinate epoch, as decimal year.

See OGRSpatialReference::GetCoordinateEpoch()

Since
  OGR 3.4

## ◆ OSRGetCRSInfoListFromDatabase()

OSRCRSInfo ** OSRGetCRSInfoListFromDatabase | ( | const char * | pszAuthName,
|  | const OSRCRSListParameters * | params,
|  | int * | pnOutResultCount
| ) |  |

Enumerate CRS objects from the database.

The returned object is an array of OSRCRSInfo* pointers, whose last entry is NULL. This array should be freed with OSRDestroyCRSInfoList()

Parameters

  pszAuthName | Authority name, used to restrict the search. Or NULL for all authorities.
  params | Additional criteria. Must be set to NULL for now.
  pnOutResultCount | Output parameter pointing to an integer to receive the size of the result list. Might be NULL

Returns
  an array of OSRCRSInfo* pointers to be freed with OSRDestroyCRSInfoList(), or NULL in case of error.

Since
  GDAL 3.0

## ◆ OSRGetDataAxisToSRSAxisMapping()

const int * OSRGetDataAxisToSRSAxisMapping | ( | OGRSpatialReferenceH | hSRS,
|  | int * | pnCount
| ) |  |

Return the data axis to SRS axis mapping.

See OGRSpatialReference::GetDataAxisToSRSAxisMapping()

Since
  GDAL 3.0

## ◆ OSRGetInvFlattening()

double OSRGetInvFlattening | ( | OGRSpatialReferenceH | hSRS,
|  | OGRErr * | pnErr
| ) |  |

Get spheroid inverse flattening.

This function is the same as OGRSpatialReference::GetInvFlattening()

## ◆ OSRGetLinearUnits()

double OSRGetLinearUnits | ( | OGRSpatialReferenceH | hSRS,
|  | char ** | ppszName
| ) |  |

Fetch linear projection units.

This function is the same as OGRSpatialReference::GetLinearUnits()

## ◆ OSRGetName()

const char * OSRGetName | ( | OGRSpatialReferenceH | hSRS | ) |

Return the CRS name.

The returned value is only short lived and should not be used after other calls to methods on this object.

Since
  GDAL 3.0

## ◆ OSRGetNormProjParm()

double OSRGetNormProjParm | ( | OGRSpatialReferenceH | hSRS,
|  | const char * | pszName,
|  | double | dfDefaultValue,
|  | OGRErr * | pnErr
| ) |  |

This function is the same as OGRSpatialReference::

This function is the same as OGRSpatialReference::GetNormProjParm()

## ◆ OSRGetPrimeMeridian()

double OSRGetPrimeMeridian | ( | OGRSpatialReferenceH | hSRS,
|  | char ** | ppszName
| ) |  |

Fetch prime meridian info.

This function is the same as OGRSpatialReference::GetPrimeMeridian()

## ◆ OSRGetPROJAuxDbPaths()

char ** OSRGetPROJAuxDbPaths | ( | void |  | ) |

Get PROJ auxiliary database filenames.

Returns
  NULL terminated list of PROJ auxiliary database filenames. To be freed with CSLDestroy()

Since
  GDAL 3.3.0

See also
  OSRSetPROJAuxDbPaths, proj_context_set_database_path

## ◆ OSRGetPROJEnableNetwork()

int OSRGetPROJEnableNetwork | ( | void |  | ) |

Get whether PROJ networking capabilities are enabled.

Returns
  TRUE if PROJ networking capabilities are enabled.

Since
  GDAL 3.4 and PROJ 7

See also
  OSRSetPROJEnableNetwork, proj_context_is_network_enabled

## ◆ OSRGetProjParm()

double OSRGetProjParm | ( | OGRSpatialReferenceH | hSRS,
|  | const char * | pszName,
|  | double | dfDefaultValue,
|  | OGRErr * | pnErr
| ) |  |

Fetch a projection parameter value.

This function is the same as OGRSpatialReference::GetProjParm()

## ◆ OSRGetPROJSearchPaths()

char ** OSRGetPROJSearchPaths | ( | void |  | ) |

Get the search path(s) for PROJ resource files.

Returns
  NULL terminated list of directory paths. To be freed with CSLDestroy()

Since
  GDAL 3.0.3

## ◆ OSRGetPROJVersion()

void OSRGetPROJVersion | ( | int * | pnMajor,
|  | int * | pnMinor,
|  | int * | pnPatch
| ) |  |

Get the PROJ version.

Parameters

  pnMajor | Pointer to major version number, or NULL
  pnMinor | Pointer to minor version number, or NULL
  pnPatch | Pointer to patch version number, or NULL

Since
  GDAL 3.0.1

## ◆ OSRGetSemiMajor()

double OSRGetSemiMajor | ( | OGRSpatialReferenceH | hSRS,
|  | OGRErr * | pnErr
| ) |  |

Get spheroid semi major axis.

This function is the same as OGRSpatialReference::GetSemiMajor()

## ◆ OSRGetSemiMinor()

double OSRGetSemiMinor | ( | OGRSpatialReferenceH | hSRS,
|  | OGRErr * | pnErr
| ) |  |

Get spheroid semi minor axis.

This function is the same as OGRSpatialReference::GetSemiMinor()

## ◆ OSRGetTargetLinearUnits()

double OSRGetTargetLinearUnits | ( | OGRSpatialReferenceH | hSRS,
|  | const char * | pszTargetKey,
|  | char ** | ppszName
| ) |  |

Fetch linear projection units.

This function is the same as OGRSpatialReference::GetTargetLinearUnits()

Since
  OGR 1.9.0

## ◆ OSRGetTOWGS84()

OGRErr OSRGetTOWGS84 | ( | OGRSpatialReferenceH | hSRS,
|  | double * | padfCoeff,
|  | int | nCoeffCount
| ) |  |

Fetch TOWGS84 parameters, if available.

This function is the same as OGRSpatialReference::GetTOWGS84().

## ◆ OSRGetUTMZone()

int OSRGetUTMZone | ( | OGRSpatialReferenceH | hSRS,
|  | int * | pbNorth
| ) |  |

Get utm zone information.

This is the same as the C++ method OGRSpatialReference::GetUTMZone()

## ◆ OSRHasPointMotionOperation()

int OSRHasPointMotionOperation | ( | OGRSpatialReferenceH | hSRS | ) |

Check if a CRS has at least an associated point motion operation.

Some CRS are not formally declared as dynamic, but may behave as such in practice due to the prsence of point motion operation, to perform coordinate epoch changes within the CRS. Typically NAD83(CSRS)v7

This function is the same as OGRSpatialReference::HasPointMotionOperation().

Since
  OGR 3.8.0 and PROJ 9.4.0

## ◆ OSRImportFromCF1()

OGRErr OSRImportFromCF1 | ( | OGRSpatialReferenceH | hSRS,
|  | CSLConstList | papszKeyValues,
|  | const char * | pszUnits
| ) |  |

Import a CRS from netCDF CF-1 definitions.

This function is the same as OGRSpatialReference::importFromCF1().

Since
  3.9

## ◆ OSRImportFromDict()

OGRErr OSRImportFromDict | ( | OGRSpatialReferenceH | hSRS,
|  | const char * | pszDictFile,
|  | const char * | pszCode
| ) |  |

Read SRS from WKT dictionary.

This method will attempt to find the indicated coordinate system identity in the indicated dictionary file. If found, the WKT representation is imported and used to initialize this OGRSpatialReference.

More complete information on the format of the dictionary files can be found in the epsg.wkt file in the GDAL data tree. The dictionary files are searched for in the "GDAL" domain using CPLFindFile(). Normally this results in searching /usr/local/share/gdal or somewhere similar.

This method is the same as the C++ method OGRSpatialReference::importFromDict().

Parameters

  hSRS | spatial reference system handle.
  pszDictFile | the name of the dictionary file to load.
  pszCode | the code to lookup in the dictionary.

Returns
  OGRERR_NONE on success, or OGRERR_SRS_UNSUPPORTED if the code isn't found, and OGRERR_SRS_FAILURE if something more dramatic goes wrong.

## ◆ OSRImportFromEPSG()

OGRErr OSRImportFromEPSG | ( | OGRSpatialReferenceH | hSRS,
|  | int | nCode
| ) |  |

Initialize SRS based on EPSG geographic, projected or vertical CRS code.

This function is the same as OGRSpatialReference::importFromEPSG().

## ◆ OSRImportFromEPSGA()

OGRErr OSRImportFromEPSGA | ( | OGRSpatialReferenceH | hSRS,
|  | int | nCode
| ) |  |

Initialize SRS based on EPSG geographic, projected or vertical CRS code.

This function is the same as OGRSpatialReference::importFromEPSGA().

## ◆ OSRImportFromERM()

OGRErr OSRImportFromERM | ( | OGRSpatialReferenceH | hSRS,
|  | const char * | pszProj,
|  | const char * | pszDatum,
|  | const char * | pszUnits
| ) |  |

Create OGR WKT from ERMapper projection definitions.

This function is the same as OGRSpatialReference::importFromERM().

## ◆ OSRImportFromESRI()

OGRErr OSRImportFromESRI | ( | OGRSpatialReferenceH | hSRS,
|  | char ** | papszPrj
| ) |  |

Import coordinate system from ESRI .prj format(s).

This function is the same as the C++ method OGRSpatialReference::importFromESRI().

## ◆ OSRImportFromMICoordSys()

OGRErr OSRImportFromMICoordSys | ( | OGRSpatialReferenceH | hSRS,
|  | const char * | pszCoordSys
| ) |  |

Import Mapinfo style CoordSys definition.

This method is the equivalent of the C++ method OGRSpatialReference::importFromMICoordSys

## ◆ OSRImportFromOzi()

OGRErr OSRImportFromOzi | ( | OGRSpatialReferenceH | hSRS,
|  | const char *const * | papszLines
| ) |  |

Import coordinate system from OziExplorer projection definition.

This function will import projection definition in style, used by OziExplorer software.

Note: another version of this function with a different signature existed in GDAL 1.X.

Parameters

  hSRS | spatial reference object.
  papszLines | Map file lines. This is an array of strings containing the whole OziExplorer .MAP file. The array is terminated by a NULL pointer.

Returns
  OGRERR_NONE on success or an error code in case of failure.

Since
  OGR 2.0

## ◆ OSRImportFromPanorama()

OGRErr OSRImportFromPanorama | ( | OGRSpatialReferenceH | hSRS,
|  | long | iProjSys,
|  | long | iDatum,
|  | long | iEllips,
|  | double * | padfPrjParams
| ) |  |

Import coordinate system from "Panorama" GIS projection definition.

See OGRSpatialReference::importFromPanorama()

## ◆ OSRImportFromPCI()

OGRErr OSRImportFromPCI | ( | OGRSpatialReferenceH | hSRS,
|  | const char * | pszProj,
|  | const char * | pszUnits,
|  | double * | padfPrjParams
| ) |  |

Import coordinate system from PCI projection definition.

This function is the same as OGRSpatialReference::importFromPCI().

## ◆ OSRImportFromProj4()

OGRErr OSRImportFromProj4 | ( | OGRSpatialReferenceH | hSRS,
|  | const char * | pszProj4
| ) |  |

Import PROJ coordinate string.

This function is the same as OGRSpatialReference::importFromProj4().

## ◆ OSRImportFromUrl()

OGRErr OSRImportFromUrl | ( | OGRSpatialReferenceH | hSRS,
|  | const char * | pszUrl
| ) |  |

Set spatial reference from a URL.

This function is the same as OGRSpatialReference::importFromUrl()

## ◆ OSRImportFromUSGS()

OGRErr OSRImportFromUSGS | ( | OGRSpatialReferenceH | hSRS,
|  | long | iProjsys,
|  | long | iZone,
|  | double * | padfPrjParams,
|  | long | iDatum
| ) |  |

Import coordinate system from USGS projection definition.

This function is the same as OGRSpatialReference::importFromUSGS().

## ◆ OSRImportFromWkt()

OGRErr OSRImportFromWkt | ( | OGRSpatialReferenceH | hSRS,
|  | char ** | ppszInput
| ) |  |

Import from WKT string.

Consult also the OGC WKT Coordinate System Issues page for implementation details of WKT in OGR.

This function is the same as OGRSpatialReference::importFromWkt().

## ◆ OSRImportFromXML()

OGRErr OSRImportFromXML | ( | OGRSpatialReferenceH | hSRS,
|  | const char * | pszXML
| ) |  |

Import coordinate system from XML format (GML only currently).

This function is the same as OGRSpatialReference::importFromXML().

## ◆ OSRIsCompound()

int OSRIsCompound | ( | OGRSpatialReferenceH | hSRS | ) |

Check if the coordinate system is compound.

This function is the same as OGRSpatialReference::IsCompound().

## ◆ OSRIsDerivedGeographic()

int OSRIsDerivedGeographic | ( | OGRSpatialReferenceH | hSRS | ) |

Check if the CRS is a derived geographic coordinate system.

(for example a rotated long/lat grid)

This function is the same as OGRSpatialReference::IsDerivedGeographic().

## ◆ OSRIsDerivedProjected()

int OSRIsDerivedProjected | ( | OGRSpatialReferenceH | hSRS | ) |

Check if the CRS is a derived projected coordinate system.

This function is the same as OGRSpatialReference::IsDerivedProjected().

Since
  GDAL 3.9.0 (and may only return non-zero starting with PROJ 9.2.0)

## ◆ OSRIsDynamic()

int OSRIsDynamic | ( | OGRSpatialReferenceH | hSRS | ) |

Check if a CRS is a dynamic CRS.

A dynamic CRS relies on a dynamic datum, that is a datum that is not plate-fixed.

This function is the same as OGRSpatialReference::IsDynamic().

Since
  OGR 3.4.0

## ◆ OSRIsGeocentric()

int OSRIsGeocentric | ( | OGRSpatialReferenceH | hSRS | ) |

Check if geocentric coordinate system.

This function is the same as OGRSpatialReference::IsGeocentric().

Since
  OGR 1.9.0

## ◆ OSRIsGeographic()

int OSRIsGeographic | ( | OGRSpatialReferenceH | hSRS | ) |

Check if geographic coordinate system.

This function is the same as OGRSpatialReference::IsGeographic().

## ◆ OSRIsLocal()

int OSRIsLocal | ( | OGRSpatialReferenceH | hSRS | ) |

Check if local coordinate system.

This function is the same as OGRSpatialReference::IsLocal().

## ◆ OSRIsProjected()

int OSRIsProjected | ( | OGRSpatialReferenceH | hSRS | ) |

Check if projected coordinate system.

This function is the same as OGRSpatialReference::IsProjected().

## ◆ OSRIsSame()

int OSRIsSame | ( | OGRSpatialReferenceH | hSRS1,
|  | OGRSpatialReferenceH | hSRS2
| ) |  |

Do these two spatial references describe the same system ?

This function is the same as OGRSpatialReference::IsSame().

## ◆ OSRIsSameEx()

int OSRIsSameEx | ( | OGRSpatialReferenceH | hSRS1,
|  | OGRSpatialReferenceH | hSRS2,
|  | const char *const * | papszOptions
| ) |  |

Do these two spatial references describe the same system ?

This function is the same as OGRSpatialReference::IsSame().

## ◆ OSRIsSameGeogCS()

int OSRIsSameGeogCS | ( | OGRSpatialReferenceH | hSRS1,
|  | OGRSpatialReferenceH | hSRS2
| ) |  |

Do the GeogCS'es match?

This function is the same as OGRSpatialReference::IsSameGeogCS().

## ◆ OSRIsSameVertCS()

int OSRIsSameVertCS | ( | OGRSpatialReferenceH | hSRS1,
|  | OGRSpatialReferenceH | hSRS2
| ) |  |

Do the VertCS'es match?

This function is the same as OGRSpatialReference::IsSameVertCS().

## ◆ OSRIsVertical()

int OSRIsVertical | ( | OGRSpatialReferenceH | hSRS | ) |

Check if vertical coordinate system.

This function is the same as OGRSpatialReference::IsVertical().

Since
  OGR 1.8.0

## ◆ OSRMorphFromESRI()

OGRErr OSRMorphFromESRI | ( | OGRSpatialReferenceH | hSRS | ) |

Convert in place from ESRI WKT format.

This function is the same as the C++ method OGRSpatialReference::morphFromESRI().

## ◆ OSRMorphToESRI()

OGRErr OSRMorphToESRI | ( | OGRSpatialReferenceH | hSRS | ) |

Convert in place to ESRI WKT format.

This function is the same as the C++ method OGRSpatialReference::morphToESRI().

## ◆ OSRNewSpatialReference()

OGRSpatialReferenceH OSRNewSpatialReference | ( | const char * | pszWKT | ) |

Constructor.

Starting with GDAL 3.0, coordinates associated with a OGRSpatialReference object are assumed to be in the order of the axis of the CRS definition (which for example means latitude first, longitude second for geographic CRS belonging to the EPSG authority). It is possible to define a data axis to CRS axis mapping strategy with the SetAxisMappingStrategy() method.

Starting with GDAL 3.5, the OSR_DEFAULT_AXIS_MAPPING_STRATEGY configuration option can be set to "TRADITIONAL_GIS_ORDER" / "AUTHORITY_COMPLIANT" (the later being the default value when the option is not set) to control the value of the data axis to CRS axis mapping strategy when a OSRSpatialReference object is created. Calling SetAxisMappingStrategy() will override this default value.

This function is the same as OGRSpatialReference::OGRSpatialReference()

## ◆ OSRPromoteTo3D()

OGRErr OSRPromoteTo3D | ( | OGRSpatialReferenceH | hSRS,
|  | const char * | pszName
| ) |  |

"Promotes" a 2D CRS to a 3D CRS one.

See OGRSpatialReference::PromoteTo3D()

Since
  GDAL 3.1 and PROJ 6.3

## ◆ OSRReference()

int OSRReference | ( | OGRSpatialReferenceH | hSRS | ) |

Increments the reference count by one.

This function is the same as OGRSpatialReference::Reference()

## ◆ OSRRelease()

void OSRRelease | ( | OGRSpatialReferenceH | hSRS | ) |

Decrements the reference count by one, and destroy if zero.

This function is the same as OGRSpatialReference::Release()

## ◆ OSRSetAngularUnits()

OGRErr OSRSetAngularUnits | ( | OGRSpatialReferenceH | hSRS,
|  | const char * | pszUnits,
|  | double | dfInRadians
| ) |  |

Set the angular units for the geographic coordinate system.

This function is the same as OGRSpatialReference::SetAngularUnits()

## ◆ OSRSetAttrValue()

OGRErr OSRSetAttrValue | ( | OGRSpatialReferenceH | hSRS,
|  | const char * | pszPath,
|  | const char * | pszValue
| ) |  |

Set attribute value in spatial reference.

This function is the same as OGRSpatialReference::SetNode()

## ◆ OSRSetAuthority()

OGRErr OSRSetAuthority | ( | OGRSpatialReferenceH | hSRS,
|  | const char * | pszTargetKey,
|  | const char * | pszAuthority,
|  | int | nCode
| ) |  |

Set the authority for a node.

This function is the same as OGRSpatialReference::SetAuthority().

## ◆ OSRSetAxes()

OGRErr OSRSetAxes | ( | OGRSpatialReferenceH | hSRS,
|  | const char * | pszTargetKey,
|  | const char * | pszXAxisName,
|  | OGRAxisOrientation | eXAxisOrientation,
|  | const char * | pszYAxisName,
|  | OGRAxisOrientation | eYAxisOrientation
| ) |  |

Set the axes for a coordinate system.

This method is the equivalent of the C++ method OGRSpatialReference::SetAxes

## ◆ OSRSetAxisMappingStrategy()

void OSRSetAxisMappingStrategy | ( | OGRSpatialReferenceH | hSRS,
|  | OSRAxisMappingStrategy | strategy
| ) |  |

Set the data axis to CRS axis mapping strategy.

See OGRSpatialReference::SetAxisMappingStrategy()

Since
  GDAL 3.0

## ◆ OSRSetCompoundCS()

OGRErr OSRSetCompoundCS | ( | OGRSpatialReferenceH | hSRS,
|  | const char * | pszName,
|  | OGRSpatialReferenceH | hHorizSRS,
|  | OGRSpatialReferenceH | hVertSRS
| ) |  |

Setup a compound coordinate system.

This function is the same as OGRSpatialReference::SetCompoundCS()

## ◆ OSRSetCoordinateEpoch()

void OSRSetCoordinateEpoch | ( | OGRSpatialReferenceH | hSRS,
|  | double | dfCoordinateEpoch
| ) |  |

Set the coordinate epoch, as decimal year.

See OGRSpatialReference::SetCoordinateEpoch()

Since
  OGR 3.4

## ◆ OSRSetDataAxisToSRSAxisMapping()

OGRErr OSRSetDataAxisToSRSAxisMapping | ( | OGRSpatialReferenceH | hSRS,
|  | int | nMappingSize,
|  | const int * | panMapping
| ) |  |

Set a custom data axis to CRS axis mapping.

Automatically implies SetAxisMappingStrategy(OAMS_CUSTOM)

This is the same as the C++ method OGRSpatialReference::SetDataAxisToSRSAxisMapping()

Since
  GDAL 3.1

## ◆ OSRSetFromUserInput()

OGRErr OSRSetFromUserInput | ( | OGRSpatialReferenceH | hSRS,
|  | const char * | pszDef
| ) |  |

Set spatial reference from various text formats.

This function is the same as OGRSpatialReference::SetFromUserInput()

See also
  OSRSetFromUserInputEx() for a variant allowing to pass options.

## ◆ OSRSetFromUserInputEx()

OGRErr OSRSetFromUserInputEx | ( | OGRSpatialReferenceH | hSRS,
|  | const char * | pszDef,
|  | CSLConstList | papszOptions
| ) |  |

Set spatial reference from various text formats.

This function is the same as OGRSpatialReference::SetFromUserInput().

Since
  GDAL 3.9

## ◆ OSRSetGeocCS()

OGRErr OSRSetGeocCS | ( | OGRSpatialReferenceH | hSRS,
|  | const char * | pszName
| ) |  |

Set the user visible PROJCS name.

This function is the same as OGRSpatialReference::SetGeocCS()

Since
  OGR 1.9.0

## ◆ OSRSetGeogCS()

OGRErr OSRSetGeogCS | ( | OGRSpatialReferenceH | hSRS,
|  | const char * | pszGeogName,
|  | const char * | pszDatumName,
|  | const char * | pszSpheroidName,
|  | double | dfSemiMajor,
|  | double | dfInvFlattening,
|  | const char * | pszPMName,
|  | double | dfPMOffset,
|  | const char * | pszAngularUnits,
|  | double | dfConvertToRadians
| ) |  |

Set geographic coordinate system.

This function is the same as OGRSpatialReference::SetGeogCS()

## ◆ OSRSetHOM()

OGRErr OSRSetHOM | ( | OGRSpatialReferenceH | hSRS,
|  | double | dfCenterLat,
|  | double | dfCenterLong,
|  | double | dfAzimuth,
|  | double | dfRectToSkew,
|  | double | dfScale,
|  | double | dfFalseEasting,
|  | double | dfFalseNorthing
| ) |  |

Hotine Oblique Mercator using azimuth angle.

Hotine Oblique Mercator using azimuth angle.

This is the same as the C++ method OGRSpatialReference::SetHOM()

## ◆ OSRSetHOM2PNO()

OGRErr OSRSetHOM2PNO | ( | OGRSpatialReferenceH | hSRS,
|  | double | dfCenterLat,
|  | double | dfLat1,
|  | double | dfLong1,
|  | double | dfLat2,
|  | double | dfLong2,
|  | double | dfScale,
|  | double | dfFalseEasting,
|  | double | dfFalseNorthing
| ) |  |

Hotine Oblique Mercator using two points on centerline.

Hotine Oblique Mercator using two points on centerline.

This is the same as the C++ method OGRSpatialReference::SetHOM2PNO()

## ◆ OSRSetHOMAC()

OGRErr OSRSetHOMAC | ( | OGRSpatialReferenceH | hSRS,
|  | double | dfCenterLat,
|  | double | dfCenterLong,
|  | double | dfAzimuth,
|  | double | dfRectToSkew,
|  | double | dfScale,
|  | double | dfFalseEasting,
|  | double | dfFalseNorthing
| ) |  |

Set an Oblique Mercator projection using azimuth angle.

This is the same as the C++ method OGRSpatialReference::SetHOMAC()

## ◆ OSRSetLinearUnits()

OGRErr OSRSetLinearUnits | ( | OGRSpatialReferenceH | hSRS,
|  | const char * | pszUnits,
|  | double | dfInMeters
| ) |  |

Set the linear units for the projection.

This function is the same as OGRSpatialReference::SetLinearUnits()

## ◆ OSRSetLinearUnitsAndUpdateParameters()

OGRErr OSRSetLinearUnitsAndUpdateParameters | ( | OGRSpatialReferenceH | hSRS,
|  | const char * | pszUnits,
|  | double | dfInMeters
| ) |  |

Set the linear units for the projection.

This function is the same as OGRSpatialReference::SetLinearUnitsAndUpdateParameters()

## ◆ OSRSetLocalCS()

OGRErr OSRSetLocalCS | ( | OGRSpatialReferenceH | hSRS,
|  | const char * | pszName
| ) |  |

Set the user visible LOCAL_CS name.

This function is the same as OGRSpatialReference::SetLocalCS()

## ◆ OSRSetNormProjParm()

OGRErr OSRSetNormProjParm | ( | OGRSpatialReferenceH | hSRS,
|  | const char * | pszParamName,
|  | double | dfValue
| ) |  |

Set a projection parameter with a normalized value.

This function is the same as OGRSpatialReference::SetNormProjParm()

## ◆ OSRSetPROJAuxDbPaths()

void OSRSetPROJAuxDbPaths | ( | const char *const * | papszAux | ) |

Set list of PROJ auxiliary database filenames.

Parameters

  papszAux | NULL-terminated list of auxiliary database filenames, or NULL

Since
  GDAL 3.3

See also
  OSRGetPROJAuxDbPaths, proj_context_set_database_path

## ◆ OSRSetProjCS()

OGRErr OSRSetProjCS | ( | OGRSpatialReferenceH | hSRS,
|  | const char * | pszName
| ) |  |

Set the user visible PROJCS name.

This function is the same as OGRSpatialReference::SetProjCS()

## ◆ OSRSetProjection()

OGRErr OSRSetProjection | ( | OGRSpatialReferenceH | hSRS,
|  | const char * | pszProjection
| ) |  |

Set a projection name.

This function is the same as OGRSpatialReference::SetProjection()

## ◆ OSRSetPROJEnableNetwork()

void OSRSetPROJEnableNetwork | ( | int | enabled | ) |

Enable or disable PROJ networking capabilities.

Parameters

  enabled | Set to TRUE to enable networking capabilities.

Since
  GDAL 3.4 and PROJ 7

See also
  OSRGetPROJEnableNetwork, proj_context_set_enable_network

## ◆ OSRSetProjParm()

OGRErr OSRSetProjParm | ( | OGRSpatialReferenceH | hSRS,
|  | const char * | pszParamName,
|  | double | dfValue
| ) |  |

Set a projection parameter value.

This function is the same as OGRSpatialReference::SetProjParm()

## ◆ OSRSetPROJSearchPaths()

void OSRSetPROJSearchPaths | ( | const char *const * | papszPaths | ) |

Set the search path(s) for PROJ resource files.

Note: starting with GDAL 3.7, CPLSetConfigOption("PROJ_DATA", ...) can also been used for the same effect.

Parameters

  papszPaths | NULL terminated list of directory paths.

Since
  GDAL 3.0

## ◆ OSRSetStatePlane()

OGRErr OSRSetStatePlane | ( | OGRSpatialReferenceH | hSRS,
|  | int | nZone,
|  | int | bNAD83
| ) |  |

Set State Plane projection definition.

This function is the same as OGRSpatialReference::SetStatePlane().

## ◆ OSRSetStatePlaneWithUnits()

OGRErr OSRSetStatePlaneWithUnits | ( | OGRSpatialReferenceH | hSRS,
|  | int | nZone,
|  | int | bNAD83,
|  | const char * | pszOverrideUnitName,
|  | double | dfOverrideUnit
| ) |  |

Set State Plane projection definition.

This function is the same as OGRSpatialReference::SetStatePlane().

## ◆ OSRSetTargetLinearUnits()

OGRErr OSRSetTargetLinearUnits | ( | OGRSpatialReferenceH | hSRS,
|  | const char * | pszTargetKey,
|  | const char * | pszUnits,
|  | double | dfInMeters
| ) |  |

Set the linear units for the target node.

This function is the same as OGRSpatialReference::SetTargetLinearUnits()

Since
  OGR 1.9.0

## ◆ OSRSetTM()

OGRErr OSRSetTM | ( | OGRSpatialReferenceH | hSRS,
|  | double | dfCenterLat,
|  | double | dfCenterLong,
|  | double | dfScale,
|  | double | dfFalseEasting,
|  | double | dfFalseNorthing
| ) |  |

Transverse Mercator.

Special processing available for Transverse Mercator with GDAL >= 1.10 and PROJ >= 4.8 : see OGRSpatialReference::exportToProj4().

## ◆ OSRSetTOWGS84()

OGRErr OSRSetTOWGS84 | ( | OGRSpatialReferenceH | hSRS,
|  | double | dfDX,
|  | double | dfDY,
|  | double | dfDZ,
|  | double | dfEX,
|  | double | dfEY,
|  | double | dfEZ,
|  | double | dfPPM
| ) |  |

Set the Bursa-Wolf conversion to WGS84.

This function is the same as OGRSpatialReference::SetTOWGS84().

## ◆ OSRSetUTM()

OGRErr OSRSetUTM | ( | OGRSpatialReferenceH | hSRS,
|  | int | nZone,
|  | int | bNorth
| ) |  |

Set UTM projection definition.

This is the same as the C++ method OGRSpatialReference::SetUTM()

## ◆ OSRSetVertCS()

OGRErr OSRSetVertCS | ( | OGRSpatialReferenceH | hSRS,
|  | const char * | pszVertCSName,
|  | const char * | pszVertDatumName,
|  | int | nVertDatumType
| ) |  |

Setup the vertical coordinate system.

This function is the same as OGRSpatialReference::SetVertCS()

Since
  OGR 1.9.0

## ◆ OSRSetWellKnownGeogCS()

OGRErr OSRSetWellKnownGeogCS | ( | OGRSpatialReferenceH | hSRS,
|  | const char * | pszName
| ) |  |

Set a GeogCS based on well known name.

This function is the same as OGRSpatialReference::SetWellKnownGeogCS()

## ◆ OSRStripVertical()

OGRErr OSRStripVertical | ( | OGRSpatialReferenceH | hSRS | ) |

Convert a compound cs into a horizontal CS.

This function is the same as the C++ method OGRSpatialReference::StripVertical().

## ◆ OSRValidate()

OGRErr OSRValidate | ( | OGRSpatialReferenceH | hSRS | ) |

Validate SRS tokens.

This function is the same as the C++ method OGRSpatialReference::Validate().