id summary reporter owner description type status priority milestone component version severity resolution keywords cc 3740 cubic / bilinear resampling with gdalwarp looks similar to nearest neighbour cdestigter warmerdam " cubic/bilinear resampled output from gdalwarp looks very rough, visually very similar to nearest neighbour. The same happens for bilinear, though cubicspline looks good. My test: {{{ # using gdalwarp gdalwarp -ts 256 256 -r cubic -of GTiff original.png resampled.tif # using ImageMagick convert -resize 256x256 original.png magick-resampled.png }}} !ImageMagick output looks far superior. I'll attach a few images to show you what I mean. I spotted this in gdal 1.6.1 but I've tested with trunk and the same behavior occurs." defect closed normal 2.0.0 GDAL_Raster svn-trunk normal fixed warp cubic bilinear