I don't understand why a raster elevation map with DCELL precision is
rejected by r.slope.aspect. The region was set to the vector analysis area.
r.info tells me this about the elevation map:
+----------------------------------------------------------------------------+
| Map: dem2014 Date: Wed May 10 13:47:46 2023 |
| Mapset: northside_rock Login of Creator: rshepard |
| Location: Oregon |
| DataBase: /data1/grassdata |
| Title: dem_2014 |
| Timestamp: none |
|----------------------------------------------------------------------------|
| |
| Type of Map: raster Number of Categories: 0 |
| Data Type: DCELL Semantic label: (none) |
| Rows: 1037 |
| Columns: 1056 |
| Total Cells: 1095072 |
| Projection: NAD83(CORS96) / Oregon North |
| N: 224201 S: 223164 Res: 1 |
| E: 2307121.58 W: 2306066 Res: 0.99960227 |
| Range of data: min = 240 max = 820 |
| |
| Data Description: |
| generated by r.surf.contour |
| |
| Comments: |
| r.surf.contour --overwrite input="baseline_dem" output="dem_2014" |
| |
+----------------------------------------------------------------------------+
grass reports (with the module usage redacted):
r.slope.aspect elev=dem2014 slope=dem2014_slope aspect=dem2014_aspect format=degrees precision=DCELLl pcurv=dem2014_pcurve dx=dem2014_ew_slope dy=dem2014_ns_slope mem=2000 --o
Generates raster maps of slope, aspect, curvatures and partial derivatives from an elevation raster map.
...
ERROR: Value <DCELLl> out of range for parameter <precision>
Legal range: CELL,FCELL,DCELL
What exactly is out of range?
TIA,
Rich