[GRASS-user] Loading IPCC GCMs into GRASS from NetCDF

GRASS GRASS user
1

I am having a problem loading the IPCC GCMs into GRASS. You can find one of them at http://www.ipcc-data.org/cgi-bin/downl/ar4_nc/pr/BCM2_SRA1B_pr_c30b.tar. They are in NetCDF format. The problem, I believe, is two-fold. First, the grid is an irregular shape, 512 by 512 cells for the whole earth. Second, it does not appear to have degrees as bounds. It may also have a third difficulty that I have not yet encountered, and that is how to get the desired band (which is the fourth one). Has anyone else tried loading these and could recommend a command or series of commands? Thanks!

Tim

Timothy S. Thomas

Research Fellow, International Food Policy Research Institute (IFPRI)

2033 K St. NW, Washington, DC 20006-1002 (Room 5035)

t.s.thomas@cgiar.org www.ifpri.org

(w) +1-202-862-4605 (f) +1-202-467-4439

skype: timothy.s.thomas

2

I've never had much luck with NetCDF over Grass so I used Grads (from
COLA) in order open and manipulate the files and export as binary
grids. Then I'd import them with r.in.bin. But you still need to know
the coordinates and resolution of the cells

Daniel

On Tue, Nov 30, 2010 at 5:32 PM, Thomas, Timothy (IFPRI)
<T.S.Thomas@cgiar.org> wrote:

I am having a problem loading the IPCC GCMs into GRASS. You can find one of
them at
http://www.ipcc-data.org/cgi-bin/downl/ar4_nc/pr/BCM2_SRA1B_pr_c30b.tar.
They are in NetCDF format. The problem, I believe, is two-fold. First,
the grid is an irregular shape, 512 by 512 cells for the whole earth.
Second, it does not appear to have degrees as bounds. It may also have a
third difficulty that I have not yet encountered, and that is how to get the
desired band (which is the fourth one). Has anyone else tried loading these
and could recommend a command or series of commands? Thanks!

Tim

***************************************************************

Timothy S. Thomas

Research Fellow, International Food Policy Research Institute (IFPRI)

2033 K St. NW, Washington, DC 20006-1002 (Room 5035)

t.s.thomas@cgiar.org www.ifpri.org

(w) +1-202-862-4605 (f) +1-202-467-4439

skype: timothy.s.thomas

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