[gdal-dev] I couldn't use OGRCreateCoordinateTransformation

Brad Hards bradh at frogmouth.net
Sun Jun 20 01:02:39 PDT 2021

What is the `polyGeometry`? 


Can you try to generate a compilable, minimal, self-contained example that demonstrates the problem?




From: gdal-dev <gdal-dev-bounces at lists.osgeo.org> On Behalf Of Ahmet Temiz
Sent: Sunday, 20 June 2021 5:56 PM
To: gdal-dev <gdal-dev at lists.osgeo.org>
Subject: [gdal-dev] I couldn't use OGRCreateCoordinateTransformation





 source.SetWellKnownGeogCS( "EPSG:3857" );
 dest.SetWellKnownGeogCS( "EPSG:4326" );

OGRCoordinateTransformation* ct = OGRCreateCoordinateTransformation(&source, &dest);


OGRPolygon *poPolygon= ( OGRPolygon *) polyGeometry;

OGRErr err=poPolygon->transform(ct) ;  // it generates this error.


ERROR 6: No translation for an empty SRS to PROJ.4 format is known.


I think, this occurs, because I could not assign any SRS value to polygon


How can I solve this problem?





Ahmet Temiz
Jeoloji Müh.
Afet ve Acil Durum Yönetimi Başkanlığı
Deprem  Dairesi Başkanlığı


Ahmet Temiz
Geological Eng.

Disaster and Emergency Management
of Presidency

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