Dear devs, What are the immediate plans to integrate terrain/dem tools? Currently we have several terrain tools available (Raster Terrain Modelling plugin, GdalTools, GRASS, Sextante). I am currently preparing a howto on terrain analysis for newbies and I am evaluating which of the above plugin to introduce. Perhaps if there are plans to integrate, I might as well introduce them to the plugin the will eventually "survive" the integration.
Thanks! ---------- Forwarded message ---------- From: maning sambale <[email protected]> Date: Thu, Apr 26, 2012 at 3:52 PM Subject: gdaldem plugin versus raster terrain modelling plugin To: qgis-user <[email protected]> Currently we have two terrain analysis plugin, one for as a core plugin (Raster Terrain Modelling) and the other in GdalTools (gdaldem). The Raster Terrain Modelling has 4 analysis algorithm (slope, aspect, ruggedness, total curvature) and has simpler UI (analysis type, input, output, output format). On the other hand, gdaltools' dem analysis has more algorithms (hillshade, slope, aspect, color-relief, TRI, TPI, roughness) and parameter switches (i.e. for Slope, scale factor). I tested the generation of both plugin on the same DEM and I got different results. Visually inspecting the map, the results looks very similar. But the data stats while not very divergent, are different, see below. $ gdalinfo -hist slope_terrainplugin.tif <snip> Metadata: STATISTICS_MAXIMUM=88.384605407715 STATISTICS_MEAN=10.562942081774 STATISTICS_MINIMUM=0 STATISTICS_STDDEV=10.476060265591 $ gdalinfo -hist slope_gdalplugin.tif <snip> Metadata: STATISTICS_MAXIMUM=87.754096984863 STATISTICS_MEAN=10.702959382095 STATISTICS_MINIMUM=0 STATISTICS_STDDEV=10.367163780773 I'm asking here for experience of people in using the two plugins, which of the two has better results in your analysis? FWIW, you can also include GRASS' r.slope.aspect in the comparison. -- cheers, maning ------------------------------------------------------ "Freedom is still the most radical idea of all" -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ ------------------------------------------------------ -- cheers, maning ------------------------------------------------------ "Freedom is still the most radical idea of all" -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ ------------------------------------------------------ _______________________________________________ Qgis-developer mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/qgis-developer
