On 24/01/2013 20:43, Elias Kotsifis wrote: > Hello > > I want to calculate the elevation of any point on earth, giving lat, > Long (for example like google elevation Api, or the earth tools: > http://www.earthtools.org/webservices.htm # cheigit) based the ASTER > GDEM MODEL V2. > I went to download data from there, and gives me geotiff files. Overall > for the entire planet is 22,702 granule with 400GB size > Then what should I do? >
Hello, Generally, a bilinear or bicubic interpolation is used to compute the elevation of the point. You should read this paper : http://www.geocomputation.org/1999/082/gc_082.htm Jean-Claude _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
