On Thu, Oct 9, 2008 at 12:01 PM, brendon wolff-piggott
<
mytekmail@...> wrote:
> Hi all
>
> I am new to GRASS (but not GIS), and am sitting with the latest edition of
> the "Open Source GIS" book in the evenings. I have a simple problem with
> subsetting a large raster file.
>
> I have SRTM data for a large area (1.9GB), and need to extract a subset of
> the data. I save a region ("ecoast") for the area I want to extract, load
> it and then use r.mapcalc to create a subarea but there is an error and no
> output raster is created.
>
> I am typing the commands in a GRASS shell called from the GRASS tools menu,
> and attach my steps following p91 of the book. Any suggestions appreciated!
>
> Thanks
> Brendon Wolff-Piggott
>
> user@USER-5F22862413 /c/documents and settings/user/grassdata/rsa/geographic
> $ g.region "region=ecoast"
Please post
g.region region=ecoast -p
to understand at which resolution you create the new map (if not the
original res.).
> user@USER-5F22862413 /c/documents and settings/user/grassdata/rsa/geographic
> $ r.mapcalc "srtm_ecoast=srtm_rsa"
>
> GRASS_INFO_ERROR(804,1): Unable to close raster map
> GRASS_INFO_END(804,1)
possilby you have nanometer resolution and try to generate a XXGB file?
Disk full?
Markus
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