Hi, I am working here in Chile and we have a lot of earthquakes here, the last big one like a year ago. So the problem is that I have a lot of georeferenced images, but georeferenced before the earthquake. We thought the best way would be to calculate a shift grid and apply it with gdalwarp to all of the images. The only thing I would have to do is to apply the grid from one datum to the same datum instead of from one datum to another, this should be possible, shouldn´t it? Reading a lot in the mailing-list I found a link to an australian govermental site, where they provide a program to convert from NTv2_ASCII to NTv2_GSB. So I created an Ntv2_ASCII file with our shift values and converted it with this program to an .gsb-file and tried to apply that file with gdalwarp to our images. But no matter what I tried, nothing happened, the shift never was applied. I saw a lot of examples of possible commands searching in the mailing-list and tried everyone, also in nearly every possible combination but nothing lead to an applied shift. So I am a bit desperate right now, hoping someone can help me a bit or give an advice. Here in short what I have to do: Apply a shift grid from UTM 18s WGS84 to UTM 18s WGS84 in order to apply the coordinate changes of our images owing of the earthquake last year.
I would apreciate any kind of help and thank a lot in advance, Frederick -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/How-to-apply-a-costum-shift-grid-tp6524901p6524901.html Sent from the GDAL - Dev mailing list archive at Nabble.com. _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
