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OGRCoordinateTransformation Class Referenceabstract

Interface for transforming between coordinate systems. More...

#include <ogr_spatialref.h>

Inherited by CompositeCT, CutlineTransformer, GCPCoordTransformation, and OGRProj4CT.

Public Member Functions

virtual OGRSpatialReferenceGetSourceCS ()=0
 Fetch internal source coordinate system. More...
 
virtual OGRSpatialReferenceGetTargetCS ()=0
 Fetch internal target coordinate system. More...
 
virtual bool GetEmitErrors ()
 Whether the transformer will emit CPLError.
 
virtual void SetEmitErrors (bool)
 Set if the transformer must emit CPLError.
 
virtual int Transform (int nCount, double *x, double *y, double *z=NULL)=0
 Transform points from source to destination space. More...
 
virtual int TransformEx (int nCount, double *x, double *y, double *z=NULL, int *pabSuccess=NULL)=0
 Transform points from source to destination space. More...
 

Static Public Member Functions

static void DestroyCT (OGRCoordinateTransformation *poCT)
 OGRCoordinateTransformation destructor. More...
 

Detailed Description

Interface for transforming between coordinate systems.

Currently, the only implementation within OGR is OGRProj4CT, which requires the PROJ.4 library to be available at run-time.

Also, see OGRCreateCoordinateTransformation() for creating transformations.

Member Function Documentation

void OGRCoordinateTransformation::DestroyCT ( OGRCoordinateTransformation poCT)
static

OGRCoordinateTransformation destructor.

This function is the same as OGRCoordinateTransformation::~OGRCoordinateTransformation() and OCTDestroyCoordinateTransformation()

This static method will destroy a OGRCoordinateTransformation. It is equivalent to calling delete on the object, but it ensures that the deallocation is properly executed within the OGR libraries heap on platforms where this can matter (win32).

Parameters
poCTthe object to delete
Since
GDAL 1.7.0
virtual OGRSpatialReference* OGRCoordinateTransformation::GetSourceCS ( )
pure virtual

Fetch internal source coordinate system.

virtual OGRSpatialReference* OGRCoordinateTransformation::GetTargetCS ( )
pure virtual

Fetch internal target coordinate system.

virtual int OGRCoordinateTransformation::Transform ( int  nCount,
double *  x,
double *  y,
double *  z = NULL 
)
pure virtual

Transform points from source to destination space.

This method is the same as the C function OCTTransform().

The method TransformEx() allows extended success information to be captured indicating which points failed to transform.

Parameters
nCountnumber of points to transform.
xarray of nCount X vertices, modified in place.
yarray of nCount Y vertices, modified in place.
zarray of nCount Z vertices, modified in place.
Returns
TRUE on success, or FALSE if some or all points fail to transform.
virtual int OGRCoordinateTransformation::TransformEx ( int  nCount,
double *  x,
double *  y,
double *  z = NULL,
int *  pabSuccess = NULL 
)
pure virtual

Transform points from source to destination space.

This method is the same as the C function OCTTransformEx().

Parameters
nCountnumber of points to transform.
xarray of nCount X vertices, modified in place.
yarray of nCount Y vertices, modified in place.
zarray of nCount Z vertices, modified in place.
pabSuccessarray of per-point flags set to TRUE if that point transforms, or FALSE if it does not.
Returns
TRUE if some or all points transform successfully, or FALSE if if none transform.

The documentation for this class was generated from the following files:

Generated for GDAL by doxygen 1.8.8.