[GRASS-dev] [GRASS GIS] #3605: r.flow incorrect output with upslope flag

GRASS GRASS developer
1

#3605: r.flow incorrect output with upslope flag
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Reporter: marisn | Owner: grass-dev@…
     Type: defect | Status: new
Priority: normal | Milestone: 7.6.0
Component: Raster | Version: svn-trunk
Keywords: r.flow | CPU: Unspecified
Platform: Unspecified |
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With certain slope configurations r.flow produces really strange output.
{{{
g.region n=200 s=0 e=200 w=0 res=1
r.mapcalc expression="sincos=sin(row()*5)*cos(col()*5)"
r.flow -u elevation=sincos flowlength=flow_path
}}}

There is an old report of potentially incorrect array access, but no idea
if it might be related: #1311

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Ticket URL: <https://trac.osgeo.org/grass/ticket/3605&gt;
GRASS GIS <https://grass.osgeo.org>

2

#3605: r.flow incorrect output with upslope flag
--------------------------+-------------------------
  Reporter: marisn | Owner: grass-dev@…
      Type: defect | Status: new
  Priority: normal | Milestone: 7.6.0
Component: Raster | Version: svn-trunk
Resolution: | Keywords: r.flow
       CPU: Unspecified | Platform: Unspecified
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Changes (by marisn):

* Attachment "r.flow.png" added.

Notice horizontal dark blue lines - they shouldn't be there as surface is
smooth in all directions from peaks to pits

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Ticket URL: <https://trac.osgeo.org/grass/ticket/3605&gt;
GRASS GIS <https://grass.osgeo.org>