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

Rich Shepard rshepard at appl-ecosys.com
Tue Jan 26 14:43:53 EST 2010

On Tue, 26 Jan 2010, Rich Shepard wrote:

>  I have a 10m DEM and tried running r.slope.aspect on it. The output files
> (one each for slope and aspect) look like static divided into square cells.
> The same problem occurs when I refine the resolution to 1m. I believe that
> Markus N. wrote a comment about this but I don't have that message.

   When I run nviz on the same raster map I also get screwey results. I've no
idea what's going on. Here's the results of r.info on that map:

Layer:    aberDEM                        Date: Tue Dec 29 14:05:59 2009
Mapset:   beaver_lake                    Login of Creator: rshepard
Location: Oregon
DataBase: /usr4/grassbase/. 
Title:    Northwest Oregon 10m DEM ( dem )
Timestamp: none

Type of Map:  raster               Number of Categories: 5729
Data Type:    CELL
Rows:         7372
Columns:      14816
Total Cells:  109223552
Projection: Lambert Conformal Conic
N: 1334419.15160578    S: 1279151.24118496   Res: 7.49700358
E: 819255.92362222    W: 769192.92822895   Res: 3.37898187
Range of data:    min = 7  max = 1476

Data Description:
generated by r.in.gdal


r.in.gdal input="/usr4/dem10m-or/hdr.adf" output="dem" title="Northwest Oregon 10m DEM"


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