virtual INT32 MgCoordinateSystemTransform::GetGeodeticTransformationCount

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[pure virtual]

Returns the number of geodetic transformations used in the implicit or explicit path used to convert the source to the target coordinate system. For a geodetic transformation to take place, both the source and the target coordinate systems have to be referenced to a datum.

Returns:

Returns the number of geodetic transformations in the path as described above. Returns 0, if no geodetic transformation will have to be done when converting from the source coordinate system to the target coordinate system. In particular, this method returns 0 in the following cases:

• The source and the target coordinate system is referenced to the same datum
• Either the source or the target coordinate system is not referenced to a datum
• This transformation object transforms between arbitrary coordinate systems.

Remarks:

This method returns a non-zero geodetic transformation count even if a geodetic transformation doesn't perform any calculations but simply assumes the datum the source coordinate system is referenced to, to be equivalent to that datum the target coordinate system is referenced to.