[Qgis-developer] GDAL Raster Merge
I have used the QGIS 1.7.0 / GDAL 1.7.3 raster merge tool to join a number of Os OpenData GeoTiff maps. There are two issues with this: 1. The file size of the merged GeoTiff is over 10x the size of the combined originals; 2. The merged map is in greyscale only, and needs to be in colour. Does anyone know if I am doing something obviously wrong here? Thanks :) ___ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer
Re: [Qgis-developer] GDAL Raster Merge
Hi 2011/8/26 uk52rob uk52...@yahoo.co.uk: 1. The file size of the merged GeoTiff is over 10x the size of the combined originals; Try to enable compression adding creation options to your command. More info you can find in GeoTiff format page [0] 2. The merged map is in greyscale only, and needs to be in colour. By default GDAL merge all input rasters into single band image. May be you problem can be solved by adding -separate parameter. [0] http://www.gdal.org/frmt_gtiff.html -- Alexander Bruy ___ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer
