Hi Huidae, Markus Metz is the expert here...
Best MarkusN (just doing a lot of backporting) On Thu, Jun 19, 2014 at 8:21 PM, Huidae Cho <gras...@gmail.com> wrote: > Hi Markus, > > Is sink filling discouraged or just not needed and optional? My impression > is that r.watershed produces better results with not sink filled rasters, > but sink filling doesn't hurt much. > > Thanks. > Huidae > > > On Tue, Jun 17, 2014 at 1:40 PM, <svn_gr...@osgeo.org> wrote: >> >> Author: neteler >> Date: 2014-06-17 10:40:00 -0700 (Tue, 17 Jun 2014) >> New Revision: 60855 >> >> Modified: >> >> grass/branches/releasebranch_7_0/raster/r.watershed/front/r.watershed.html >> Log: >> r.watershed manual: (minor) sync with trunk >> >> Modified: >> grass/branches/releasebranch_7_0/raster/r.watershed/front/r.watershed.html >> =================================================================== >> --- >> grass/branches/releasebranch_7_0/raster/r.watershed/front/r.watershed.html >> 2014-06-17 17:39:37 UTC (rev 60854) >> +++ >> grass/branches/releasebranch_7_0/raster/r.watershed/front/r.watershed.html >> 2014-06-17 17:40:00 UTC (rev 60855) >> @@ -55,7 +55,8 @@ >> values are valid elevation data. Gaps in the elevation map that are >> located within the area of interest must be filled beforehand, >> e.g. with <em><a href="r.fillnulls.html">r.fillnulls</a></em>, to >> -avoid distortions. >> +avoid distortions. The elevation map need not be sink-filled because >> +the module uses a least-cost algorithm. >> >> <p> >> Map of actual depressions or sinkholes in the landscape that are large >> @@ -113,7 +114,7 @@ >> <p> >> Output <b>tci</b> raster map contains topographic index TCI is >> computed as >> -<tt>ln(α / tan(β))</tt> where α a is the cumulative >> +<tt>ln(α / tan(β))</tt> where α is the cumulative >> upslope area draining through a point per unit contour length and >> <tt>tan(β)</tt> is the local slope angle. The TCI reflects the >> tendency of water to accumulate at any point in the catchment and the >> >> _______________________________________________ >> grass-commit mailing list >> grass-com...@lists.osgeo.org >> http://lists.osgeo.org/mailman/listinfo/grass-commit > > _______________________________________________ grass-dev mailing list grass-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-dev