[GRASS-user] Importing DMSP-OLS in an Lat-Lon based Location

[Nikos Alexandris]

Nikos Alexandris:

> What is exactly wrong when importing imagery from
> <http://ngdc.noaa.gov/eog/dmsp/downloadV4composites.html> in a GRASS
> LL-based Location?

> gdalinfo for one image reports:
> Upper Left  (-180.0041667,  75.0041667) (180d 0'15.00"W, 75d 
> 0'15.00"N)
> Lower Left  (-180.0041667, -65.0041661) (180d 0'15.00"W, 65d 
> 0'15.00"S)
> Upper Right ( 180.0041652,  75.0041667) (180d 0'14.99"E, 75d 
> 0'15.00"N)
> Lower Right ( 180.0041652, -65.0041661) (180d 0'14.99"E, 65d 
> 0'15.00"S)
> Center      (  -0.0000007,   5.0000003) (  0d 0' 0.00"W,  5d 0' 
> 0.00"N)

> while the created Location, based on this image reports:
> n=75.0041666666667
> s=-65.0041661066667
> w=179.995833333333
> e=180.004165226667
> nsres=0.00833333330000198
> ewres=1.92863436804174e-07
> rows=16801
> cols=43201
> cells=725820001

> I can't draw any maps.  Is this related/similar to the problem solved
> for ETOPO1 here:
> <http://grasswiki.osgeo.org/wiki/Global_datasets#ETOPO1_.28DEM.29>?

I forgot, importing with the "-l" flag, gives a warning:

WARNING: Map bounds have been constrained to geographic coordinates. 
You
          will almost certainly want to check map bounds and resolution 
with
          r.info and reset them with r.region before going any further.

So, these need to be re-set?

Nikos