[GRASS-dev] Re: [GRASS GIS] #399: Added "backlink" functionality to
r.walk, r.cost & r.drain
GRASS GIS
trac at osgeo.org
Sun Dec 21 22:47:23 EST 2008
#399: Added "backlink" functionality to r.walk, r.cost & r.drain
--------------------------+-------------------------------------------------
Reporter: cnielsen | Owner: grass-dev at lists.osgeo.org
Type: enhancement | Status: new
Priority: major | Milestone: 6.4.0
Component: Raster | Version: unspecified
Resolution: | Keywords:
Platform: All | Cpu: All
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Comment (by dylan):
OK Some real comments.
I have noticed that the patch r.cost gives a segmentation fault if the
outdir raster is not specified. The cost surface is identical between
r.cost in SVN and the patched version. The output from the patched r.drain
(without the new backlink functionality) is identical to the SVN version
of r.drain.
Attempting to use the outdir/indir options on r.cost/r.drain does not seem
to work. I get:
{{{
r.drain -d input=cost_new output=cost.drain_new vector_points=end
indir=cost_dir --o
Directional drain selected... checking for direction raster
Direction raster found <cost_dir>
Dev note: Adapted sites library used for vector points. (module should be
updated to GRASS 6 vector library)
ERROR: Raster map (·¿Óõ·>^[[?1;2c not a direction map
}}}
Probably related to my crappy hack job getting the patched r.drain to
compile.
Another thing. Patched r.cost and r.drain do not seem to be using the
standard GRASS command line parser, as partial arguments such as 'in'
(input) are not accepted as legal arguments.
--
Ticket URL: <http://trac.osgeo.org/grass/ticket/399#comment:6>
GRASS GIS <http://grass.osgeo.org>
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