Public Member Functions | |
| virtual CPLErr | GetGeoTransform (double *) |
| Fetch the affine transformation coefficients. | |
| virtual const char * | GetProjectionRef () |
| Fetch the projection definition string for this dataset. | |
| virtual int | GetGCPCount () |
| Get number of GCPs. | |
| virtual const char * | GetGCPProjection () |
| Get output projection for GCPs. | |
| virtual const GDAL_GCP * | GetGCPs () |
| Fetch GCPs. | |
Protected Attributes | |
| int | bGeoTransformValid |
| double | adfGeoTransform [6] |
| char * | pszProjection |
| int | nGCPCount |
| GDAL_GCP * | pasGCPList |
Member Function Documentation
| int GDALGeorefPamDataset::GetGCPCount | ( | ) | [virtual] |
Get number of GCPs.
This method is the same as the C function GDALGetGCPCount().
- Returns:
- number of GCPs for this dataset. Zero if there are none.
Reimplemented from GDALPamDataset.
| const char * GDALGeorefPamDataset::GetGCPProjection | ( | ) | [virtual] |
Get output projection for GCPs.
This method is the same as the C function GDALGetGCPProjection().
The projection string follows the normal rules from GetProjectionRef().
- Returns:
- internal projection string or "" if there are no GCPs. It should not be altered, freed or expected to last for long.
Reimplemented from GDALPamDataset.
| const GDAL_GCP * GDALGeorefPamDataset::GetGCPs | ( | ) | [virtual] |
Fetch GCPs.
This method is the same as the C function GDALGetGCPs().
- Returns:
- pointer to internal GCP structure list. It should not be modified, and may change on the next GDAL call.
Reimplemented from GDALPamDataset.
| CPLErr GDALGeorefPamDataset::GetGeoTransform | ( | double * | padfTransform | ) | [virtual] |
Fetch the affine transformation coefficients.
Fetches the coefficients for transforming between pixel/line (P,L) raster space, and projection coordinates (Xp,Yp) space.
Xp = padfTransform[0] + P*padfTransform[1] + L*padfTransform[2]; Yp = padfTransform[3] + P*padfTransform[4] + L*padfTransform[5];
In a north up image, padfTransform[1] is the pixel width, and padfTransform[5] is the pixel height. The upper left corner of the upper left pixel is at position (padfTransform[0],padfTransform[3]).
The default transform is (0,1,0,0,0,1) and should be returned even when a CE_Failure error is returned, such as for formats that don't support transformation to projection coordinates.
This method does the same thing as the C GDALGetGeoTransform() function.
- Parameters:
-
padfTransform an existing six double buffer into which the transformation will be placed.
- Returns:
- CE_None on success, or CE_Failure if no transform can be fetched.
Reimplemented from GDALPamDataset.
| const char * GDALGeorefPamDataset::GetProjectionRef | ( | void | ) | [virtual] |
Fetch the projection definition string for this dataset.
Same as the C function GDALGetProjectionRef().
The returned string defines the projection coordinate system of the image in OpenGIS WKT format. It should be suitable for use with the OGRSpatialReference class.
When a projection definition is not available an empty (but not NULL) string is returned.
- Returns:
- a pointer to an internal projection reference string. It should not be altered, freed or expected to last for long.
Reimplemented from GDALPamDataset.
The documentation for this class was generated from the following files:
- gdalgeorefpamdataset.h
- gdalgeorefpamdataset.cpp
