Hi,
I am trying to set up a grid with a specified resolution using
g.region. The information about the grid that came with the data that I
want to plot is:
X grid origin: 0.2812500
Y grid origin: -89.81250
X grid size: 640
Y grid size: 480
X grid resolution: 0.5625000
Y grid resolution: 0.3750000
I set up the grid with the following command:
GRASS 6.4.1 (global_ll_wgs84):~/NAME/G2011 > g.region w=0.2812500
s=-89.81250 cols=640 rows=480 ewres=0.562500 nsres=0.3750000
I would expect this grid to cover the whole globe (e.g. 640*0.5625=360),
but instead it just generates a thin strip, and the ewres is too small.
GRASS 6.4.1 (global_ll_wgs84):~/NAME/G2011 > g.region -p
projection: 3 (Latitude-Longitude)
zone: 0
datum: wgs84
ellipsoid: wgs84
north: 74N
south: 89:48:45S
west: 0:16:52.5E
east: 24E
nsres: 0:20:28.59375
ewres: 0:02:13.417969
rows: 480
cols: 640
cells: 307200
Where am I going wrong?
John
--
Dr John A Stevenson
RSE/Scottish Government Personal Research Fellow
(co-funded by Marie Curie Actions)
School of GeoSciences
The University of Edinburgh
Grant Institute
West Mains Road
Edinburgh EH9 3JW
Scotland
PHONE: (+44) 131 650 7526
FAX: (+44) 131 668 3184
email: [email protected]
web: http://www.geos.ed.ac.uk/homes/jsteven5
blog: http://all-geo.org/volcan01010
The University of Edinburgh is a charitable body, registered in
Scotland, with registration number SC005336.
_______________________________________________
grass-user mailing list
[email protected]
http://lists.osgeo.org/mailman/listinfo/grass-user
