#398: r.watershed with MFD --------------------------+------------------------------------------------- Reporter: mmetz | Owner: grass-dev@lists.osgeo.org Type: enhancement | Status: reopened Priority: minor | Milestone: 7.0.0 Component: Raster | Version: svn-trunk Resolution: | Keywords: Platform: Unspecified | Cpu: Unspecified --------------------------+------------------------------------------------- Comment (by mmetz):
A new patch against trunk r35238 is attached, named r.watershed.20090107.patch This patch includes the following changes: - MFD flow accumulation is slightly improved. - MFD streams and basins are now equal to or better than SFD streams and basins (they look more natural, no slivers or rectangles). Striking differences are visible with elev_lid792_1m (multiplied by 1000 to get mm accuracy) in nc_spm_08. - Segmented mode is slightly faster, more noticeable with larger regions. - In segmented mode, the dseg routines for DCELL output maps were actually writing out CELL maps, not DCELL maps, changed to DCELL maps. DCELL_TYPE is required for LS and S factor for USLE and for flow accumulation. - Improved color rules for flow accumulation based on standard deviation and log transformation, visual output would be obsolete now. BTW, in visual output all cells with negative flow accumulation (offmap inflow) are set to zero. That's an old, existing feature. - In segmented mode, G_percent() in length slope determination is now counting up, no longer counting down (was a FIXME). Can you developers please test this patch? Thanks! Happy New Year, Markus M -- Ticket URL: <http://trac.osgeo.org/grass/ticket/398#comment:6> GRASS GIS <http://grass.osgeo.org>
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