[GRASS-dev] Re: [GRASS GIS] #1597: r.topidx ERROR current region resolution

[GRASS GIS]

#1597: r.topidx ERROR current region resolution
----------------------+-----------------------------------------------------
 Reporter:  madi      |       Owner:  grass-dev@…              
     Type:  defect    |      Status:  new                      
 Priority:  normal    |   Milestone:  6.5.0                    
Component:  Raster    |     Version:  svn-develbranch6         
 Keywords:  r.topidx  |    Platform:  Linux                    
      Cpu:  x86-64    |  
----------------------+-----------------------------------------------------

Comment(by madi):

 Replying to [comment:5 hamish]:
 > ok so the two grids don't match (your dem map is not on multiples of
 20m, its grid is offset), and it is being resampled. what does the full
 r.info say? (everything between the Type of map: and Range of data: lines)
 >
 > was it a self-made DEM or did you import it from some 3rd party source?
 (ie can you remake it on a cleaner grid without loss?)
 >
 > also try "g.region -p rast=dem" before r.topidx so that the region and
 the map perfectly align the map's (offset) grid.
 >
 >
 > Hamish

 OK figured out:

 g.region -p rast=dem
 projection: 1 (UTM)
 zone:       33
 datum:      wgs84
 ellipsoid:  wgs84
 north:      4559778
 south:      4403628
 west:       525987
 east:       669447
 nsres:      20.0012809
 ewres:      20
 rows:       7807
 cols:       7173
 cells:      55999611

 Now it works. Thanks.

 madi

-- 
Ticket URL: <https://trac.osgeo.org/grass/ticket/1597#comment:8>
GRASS GIS <http://grass.osgeo.org>