GDAL
Classes | Macros | Functions
ogr_spatialref.h File Reference

Coordinate systems services. More...

#include "ogr_srs_api.h"

Go to the source code of this file.

Classes

class  OGR_SRSNode
 Objects of this class are used to represent value nodes in the parsed representation of the WKT SRS format. More...
 
class  OGRSpatialReference
 This class represents an OpenGIS Spatial Reference System, and contains methods for converting between this object organization and well known text (WKT) format. More...
 
class  OGRCoordinateTransformation
 Interface for transforming between coordinate systems. More...
 

Macros

#define USGS_ANGLE_DECIMALDEGREES   0
 Angle is in decimal degrees. More...
 
#define USGS_ANGLE_PACKEDDMS   TRUE
 Angle is in packed degree minute second. More...
 
#define USGS_ANGLE_RADIANS   2
 Angle is in radians. More...
 

Functions

OGRCoordinateTransformationOGRCreateCoordinateTransformation (OGRSpatialReference *poSource, OGRSpatialReference *poTarget)
 Create transformation object. More...
 

Detailed Description

Coordinate systems services.

Macro Definition Documentation

#define USGS_ANGLE_DECIMALDEGREES   0

Angle is in decimal degrees.

#define USGS_ANGLE_PACKEDDMS   TRUE

Angle is in packed degree minute second.

#define USGS_ANGLE_RADIANS   2

Angle is in radians.

Function Documentation

OGRCoordinateTransformation* OGRCreateCoordinateTransformation ( OGRSpatialReference poSource,
OGRSpatialReference poTarget 
)

Create transformation object.

This is the same as the C function OCTNewCoordinateTransformation().

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

The delete operator, or OCTDestroyCoordinateTransformation() should be used to destroy transformation objects.

The PROJ.4 library must be available at run-time.

Parameters
poSourcesource spatial reference system.
poTargettarget spatial reference system.
Returns
NULL on failure or a ready to use transformation object.

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