Hi, This question appears every now and then in the gis.stackexchange and I have been wondering about it by myself as well: How to generate a footprint polygon of the real image data area so that the possible nodata areas would not be included?
I have been thinking that I could convert the original image into a new image with alpha channel or a one-bit image with nodata=0 and yesdata=1 and then polygonize the alpha band or the 1-bit image with gdal_polygonize.py. I guess that it would work but it feels a bit complicated. Is there any more direct way for doing this task with GDAL? I bet that at least someone has written a python script for it because the need is so obvious. -Jukka Rahkonen- _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
