Hello,
The code compiles because it is part of a bigger program. This is
just the portion on Coordinate Transformation.
Any additional comment is welcomed.
I did not compile GDAL. I am using gdalwin32exe141 & gdalwin32dev141
pre-built GDAL.
Thanks for your help.
Reinaldo
At 01:25 AM 4/10/2009, Howard Butler wrote:
On Apr 9, 2009, at 9:38 PM, Reinaldo Escada Chohfi wrote:
Hello all,
We place this piece of code to test how coordinate transformation
works with OGR.
OGRSpatialReference oSourceSRS, oTargetSRS;
OGRCoordinateTransformation *poCT;
double x1, y1;
oSourceSRS="EPSG:4326";
oTargetSRS="EPSG:4989";
I don't see how this could compile. You need to instantiate
oSourceSRS and oTargetSRS with OSRNewSpatialReference, and then use a
call like OSRImportFromEPSG or OSRSetFromUserInput on the objects to
get valid SpatialReferences.
The program compiles fine, but it gives the following runtime error:
ERROR 6: Unable to load PROJ.4 library (proj.dll), creation of
OGRCoordinateTransformation failed.
Isn't PROj.4 (proj.lib) built in OGR?
No, it is loaded at runtime unless you use have PROJ_FLAGS = -
DPROJ_STATIC in your nmake.opt when you compile. Otherwise, you must
ensure that GDAL_DATA and/or PROJ_LIB environment variables are set,
and the necessary data can be found in those locations *and* the
proj.dll that was linked with GDAL at compile time is able to be found
at runtime.
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