[gdal-dev] how to use the -ct option in ogr2ogr

[Karsten Tebling]

Hello,

i'm struggling with how to use the -ct option in ogr2ogr and could need 
some help.

i copied a NTv2.gsb to osgeo4w64/share/proj and edited the proj.db by 
inserting a new row in the grid_transformation-table. using this 
transformation in qgis works. however when i try to use it in ogr2ogr 
with the same data i always get "failed to reproject feature (geometry 
probably out of source or destination srs). no known way to write 
feature with geometry 'none'". here is my code:

ogr2ogr -s_srs "EPSG:31468" -t_srs "EPSG:25833" -dim XYZ -ct 
"+proj=pipeline +step +inv +proj=tmerc +lat_0=0 +lon_0=12 +k=1 
+x_0=4500000 +y_0=0 +ellps=bessel +step +proj=hgridshift 
+grids=NTv2LSBB_LSA.gsb +step +proj=utm +zone=33 +ellps=GRS80" -f DXF 
punkte_25833.dxf punkte_31468.dxf

i'm using the latest qgis-ltr and osgeo4w shell

greetings