Hi all,
I am using r.drain with an elevation raster as input. I filled the elevation
raster using r.fill.dir. When I run r.drain, it only creates a short path
segment before finishing the analysis, even though it hasn't come close to
the region border. There should not be any sinks in my elevation raster
because I filled it. Does anyone have any experience with this problem?
Thanks!
Charlie
--
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Thanks to Markus and Ivan for the help-- I’ll answer this on the forum in case others have the same problem in the future.
For the record, I am using GRASS 6.4.4 on Mac OS 10.9.5.
The problem was that though I ran r.fill.dir once, there were still sinks in my DEM. After running r.fill.dir 5 total times, I removed all of the sinks in the DEM and r.drain worked well.
Thanks for indulging a new user!
Charlie
···
On Tue, Oct 28, 2014 at 11:52 AM, Ivan Marchesini <ivan.marchesini@gmail.com> wrote:
Hi,
could be that the dtm is not really/completelly filled. Please try to verify the elevations of the dtm cells surrounding the one where the drain stops.
Best
On 28 Oct 2014 17:19, “cmshobe” <charles.shobe@colorado.edu> wrote:
Hi all,
I am using r.drain with an elevation raster as input. I filled the elevation
raster using r.fill.dir. When I run r.drain, it only creates a short path
segment before finishing the analysis, even though it hasn’t come close to
the region border. There should not be any sinks in my elevation raster
because I filled it. Does anyone have any experience with this problem?
Thanks!
Charlie
–
View this message in context: http://osgeo-org.1560.x6.nabble.com/r-drain-stops-after-short-segment-tp5170003.html
Sent from the Grass - Users mailing list archive at Nabble.com.
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