[GRASS-dev] false resolution setting by g.region res= or g.region nsres= ewres=

[Blumentrath, Stefan]

Hi Helmut,

If you want to align bounds to resolution you need to set the a-flag:
g.region -pa res=75

Otherwise you might have to add some meters in n-s-direction 2698025-2609100=1185,666666666667 (e.g. s=s-25).

Cheers
Stefan

-----Original Message-----
From: grass-dev-bounces at lists.osgeo.org [mailto:grass-dev-bounces at lists.osgeo.org] On Behalf Of Helmut Kudrnovsky
Sent: 22. juni 2014 22:02
To: grass-dev at lists.osgeo.org
Subject: [GRASS-dev] false resolution setting by g.region res= or g.region nsres= ewres=

hi,

given following region:

g.region -p                                                                     
projection: 99 (Lambert Azimuthal Equal Area)
zone:       0
datum:      etrs89
ellipsoid:  grs80
north:      2698025
south:      2609100
west:       4471150
east:       4556275
nsres:      25
ewres:      25
rows:       3557
cols:       3405
cells:      12111585

now I want to change the resolution from 25 to 75 

g.region res=75 

g.region -p                                                                     
projection: 99 (Lambert Azimuthal Equal Area)
zone:       0
datum:      etrs89
ellipsoid:  grs80
north:      2698025
south:      2609100
west:       4471150
east:       4556275
nsres:      74.97892074 <= !!!
ewres:      75
rows:       1186
cols:       1135
cells:      1346110

or

g.region nsres=75 ewres=75

g.region -p                                                                     
projection: 99 (Lambert Azimuthal Equal Area)
zone:       0
datum:      etrs89
ellipsoid:  grs80
north:      2698025
south:      2609100
west:       4471150
east:       4556275
nsres:      74.97892074  <= !!!
ewres:      75
rows:       1186
cols:       1135
cells:      1346110


nsres is set to 74.97892074 as instead 75.

any ideas?

System Info                                                                     
GRASS Version: 7.0.0svn                                                         
GRASS SVN Revision: 60869                                                       
Erstellungsdatum: 2014-06-20                                                    
Build Platform: i686-pc-mingw32                                                 
GDAL/OGR: 1.11.0                                                                
PROJ.4: 4.8.0                                                                   
GEOS: 3.4.2                                                                     
SQLite: 3.7.17                                                                  
Python: 2.7.4                                                                   
wxPython: 2.8.12.1                                                              
Platform: Windows-7-6.1.7601-SP1 (OSGeo4W)   



-----
best regards
Helmut
--
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