You are right, its mistake from my end. spaces should be there (ogr2ogr -clipsrc -9943695.99544 5321548.895035 -9943537.149741 5321390.049336 -f MVT....) "-clipsrc" in C# is working fine with your code snippet. Thanks. -- Sent from: http://osgeo-org.1560.x6.nabble.com/GDAL-Dev-f3742093.html