Hi, According to the documentation gdal and ogr use the same algorithm for the tps-transformation but I don't seem to get the same results using the same set of gcp's for images and vectors.
I have images that are unreferenced and vector data digitised on these images (in pixel coordinates). The images are then georeferenced with +100 gcp's and warped with gdalwarp using the "tps" option. When I use the same gcp's (with adjusted y-origin to lower left corner) to georeference the vector data with ogr2ogr and the "tps" option I get different results. The vector-result is similar to the image-result but never exactly the same and differences can be substantial. Any thoughts? Stijn
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