[GRASS-user] r.slope.aspect: Unexpected Results

[Glynn Clements]

Rich Shepard wrote:

>    The source originally-imported DEM produces appropriate slope and aspect
> maps. The sub-region I cut out with v.in.region (I believe that's the module
> I used) doesn't calculate properly. Therefore, the problem is with the
> sub-map.

It's possible that the cropping may have changed the grid slightly.

What are the grid parameters (bounds, resolution, rows/cols) for the
source map and the cropped version?

You could try repeating the cropping process, using g.region's align=
option to align the grid to the source map.

-- 
Glynn Clements <glynn at gclements.plus.com>