Le lundi 14 avril 2014 16:16:09, Nicole Stoffels a écrit : > Dear Gdal-List, > > I have a large ASTER file (downloaded from > http://www.eea.europa.eu/data-and-maps/data/eu-dem#tab-european-data) in > the GeoTIFF-format. It is compressed with LZW. What I want to do is: > > 1. unpack it > 2. seperate a smaller region from it > 3. convert this regional GeoTIFF to a PNG
I've downloaded the file and it contains only "nan" (not a number) values. So nothing wrong with GDAL. It is just a tile that is at the border of the whole dataset and has no useful data in it. If you look at the coordinates : Upper Left ( 6000000.000, 5000000.000) ( 46d 5'30.86"E, 64d 4'23.83"N) Lower Left ( 6000000.000, 4000000.000) ( 37d47' 0.49"E, 56d 7'28.33"N) Upper Right ( 7000000.000, 5000000.000) ( 61d24'37.34"E, 58d45'47.24"N) Lower Right ( 7000000.000, 4000000.000) ( 51d32'27.75"E, 51d55'27.24"N) Center ( 6500000.000, 4500000.000) ( 49d 5'19.45"E, 58d 0'56.34"N) The center is ~ N 58 E 49, and Moscow is ~ N 55 E 37, so you're definitely outside European Union... -- Geospatial professional services http://even.rouault.free.fr/services.html _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev