Le mercredi 25 novembre 2015 16:16:17, Ramiro Marco Figuera a écrit : > Hi all, > > I noticed a curious gridded pattern when using gdalwarp to reproject. I > am reprojecting some lunar south polar DEMs in stereographic projection > to gnomonic projection. I am using the following command: gdalwarp > -t_srs '+proj=gnom +lat_0=-90 +lon_0=0 +x_0=0 +y_0=0 +a=1737400 > +b=1737400 +units=m +no_defs ' topo_stereo.tif topo_gnom.tif
The default resampling of gdalwarp is nearest neighbour. Perhaps try something more advanced like -r bilinear or -r cubic ? > > When I create a hillshaded map using gdaldem hillshade I can see a > gridded pattern. I did a hillshaded map with the original map and the > grid is no there. Am I making a mistake when reprojecting or is that a > bug? I can provide images if necessary. > > Cheers, > > Ramiro -- Spatialys - Geospatial professional services http://www.spatialys.com _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
