<div dir="ltr">Hi all<br><br>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. <br>
<br>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. <br>
<br>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!<br><br>Thanks<br>Brendon Wolff-Piggott <br><br>user@USER-5F22862413 /c/documents and settings/user/grassdata/rsa/geographic<br>
$ g.region "region=ecoast"<br><br>user@USER-5F22862413 /c/documents and settings/user/grassdata/rsa/geographic<br>$ r.mapcalc "srtm_ecoast=srtm_rsa"<br><br>GRASS_INFO_ERROR(804,1): Unable to close raster map<br>
GRASS_INFO_END(804,1)<br> </div>