[Gdal-dev] Datum shifting in GDAL utilities

[Frank Warmerdam]

On 1/5/06, Antonin Orlik <antonin.orlik.hgf at vsb.cz> wrote:
> Dear developers,
>
> please, could anybody tell me why the ogr2ogr and gdal_warp are using
> proj utility for coordinates transformation instead of cs2cs utility?
> This fact makes quite a big  position error after the coordinate
> transformation between coordinate systems based on diferent ellipsoids
> (the proj utility cannot make datum shifting).

Antonin,

The ogr2ogr and gdalwarp programs use the pj_transform()
entry point in libproj.so (or PROJ.DLL) the same as cs2cs.
Could you be more specific why you think the programs
aren't doing datum shifting?

Best regards,
--
---------------------------------------+--------------------------------------
I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush    | Geospatial Programmer for Rent