[gdal-dev] Coordinate Transformation Question

[Frank Warmerdam]

Joel Odom wrote:
> Is it possible to transform between a Lambert projection (NAD83 datum)
> and WGS84 geographic?  I'm trying the following, but poCT is null:
> 
> OGRSpatialReference oSRS;
> if (oSRS.importFromWkt((char**)&projectionRef) != OGRERR_NONE)
>   //...
> OGRSpatialReference wgs84;
> wgs84.SetWellKnownGeogCS("WGS84");
> OGRCoordinateTransformation *poCT =
> OGRCreateCoordinateTransformation(&oSRS, &wgs84);
> 
> 
> In this case oSRS is the Lambert Conformal / NAD83.  Thanks for any help.

Joel,

Yes, this should work fine assuming thereis nothing funky about your
LCC projection definition.  Note that OGR/PROJ.4 consider NAD83 and WGS84
to be equivelent datums for transformation purposes.

If you post your projection string for the LCC I could try it here for
comparison.

Best regards,
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