[gdal-dev] Hillshade + Topographic Map??

2012-02-21 Thread TJMartin
Hi I have managed to create a hillshade using gdaldem and I have my original topographic rasters. However I do not want the standard grey hillshad or apply a colour ramp. Is there a way to combine the hillshade and topo map together - ie add a transparency or opacity to the hillshade. I have

Re: [gdal-dev] Hillshade + Topographic Map??

2012-02-21 Thread Frank Broniewski
Hi, the standard procedure for creating topo-maps is to overlay your land coverage map with a semi-transparent hillshading. I don't know if there's a tool for combining/adding two raster maps together in gdal, but this is a rather standard procedure in any GIS. In QGIS, for example, you can

Re: [gdal-dev] Hillshade + Topographic Map??

2012-02-21 Thread Volker Wichmann
The workflow with QGIS described by Frank is also working with SAGA GIS. SAGA also allows you to export a permament combination as image file (tif, jpg, png ... including world file and kml) with the 'Export Image' module. Volker On 02/21/2012 02:14 PM, Frank Broniewski wrote: Hi, the