On 03/04/15 09:45, image93 wrote:
Good morning, I have to extract slope lower than 25 meters. But i'm working with SRTM raster DEM 30 meters resolution... 1/ Is there a tool with qgis in order to extract slope values? 2/ According to you, is it possible to extract 25 meters slope values with srtm 30 meters. if it is not the case, do you know another way? Another DEM more acurate for instance? Thank you very much.
You can always interpolate from 30m resolution data to an estimation of higher-resolution data, for example using v.surf.rst. However, this will always only be an estimation, not the real altitude data. If you want real slope you have to find a higher-resolution DEM. Which region are you working on ?
For France, IGN-France has higher-resolution products. Moritz _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
