[GRASS-user] Re: Import global maps (Ascii, png or KLM) from riverthreat.net

[Johannes Radinger]

Hello again!

Just to follow up my last weeks question:
Is there anyone who can help me how to import a map from
riverthreat.net? What are the appropriate settings of the
coordinate system? and how do I have to import the raster
maps? For more info just see email below.

thank you very much
/Johannes


-------- Original-Nachricht --------
Datum: Wed, 10 Aug 2011 12:43:42 +0200
Von: "Johannes Radinger" <JRadinger at gmx.at>
An: grass-user at lists.osgeo.org
Betreff: Import global maps (Ascii, png or KLM) from riverthreat.net

Hello,

I've a question concerning the import of raster maps into grass:

On http://www.riverthreat.net/data.html it is possible to get
worldwide data on river threats and environmental pressures. The data
are provided either as images (png), ascii files or Google-Earth KLM files
with a resolution of 30 seconds (0.5 degrees).

I'd like to import some of these maps into grass gis for further analysis. Thus some questions arise: 

*Which coordinate system do I have to select so that the data are displayed correctly?
* What is the best data format for the import? I think maybe Ascii? These files have a header like following:
ncols   720
nrows   360
xllcorner   -180.000000
yllcorner   -90
cellsize   0.500000
NODATA_value   -9999.000000

Maybe you can help me with the import!

Thank you very much
Johannes
-- 
NEU: FreePhone - 0ct/min Handyspartarif mit Geld-zurück-Garantie!		
Jetzt informieren: http://www.gmx.net/de/go/freephone


-- 
NEU: FreePhone - 0ct/min Handyspartarif mit Geld-zurück-Garantie!		
Jetzt informieren: http://www.gmx.net/de/go/freephone