Jonathan Moules <jonathanmoules@...> writes: > > > Hi List, > I've got a 4 band raster aerial photography (RGBI) that comprises lots of tiles. I've merged some of the tiles together with: > > > > gdal_merge -o 1.tif -of GTiff -co TILED=YES -co BIGTIFF=YES -co COMPRESS=JPEG -co JPEG_QUALITY=50 -co BLOCKXSIZE=512 -co BLOCKYSIZE=512 --optfile tiff_list.txt
Are you sure that after running that command you have a 4-band image? I have believed that JPEG compression can be used only for 1- or 3-band images. What does gdalinfo report about your image? I would have a try by using LZW or deflate compression and annex for example a screenshot about the settings you have been using for selecting the bands and adjusting histogram stretching etc. -Jukka Rahkonen- _______________________________________________ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
