larss at fmi.kth.se
Tue Jun 22 12:58:25 EDT 1993
1. Are there any modifications of r.reclass which
allow reclassification of data sets which
contain negative data values?
I am doing that all the time. Is there some limitation in the
software here that I don't know about? For me it seems to work
2. Are there any modifications of r.mask which
allow for its noninteractive use?
Most of the time I create masks with r.mapcalc.
E.g.: echo "MASK = if ( ...... )" | r.mapcalc
3. Are there any written guides to the creation
and use of scripts in GRASS?
Yes there are some pages in the programming manual.
Good examples are found by looking at the current scripts
that are in Grass and by reading GrassClippings. That is
how I have learned.
4. Can scripts for GRASS be run only from within
GRASS, or can they be run from UNIX also?
Yes, if you are setting up the same global variables in the
shell scripts as Grass is doing. That is $LOCATION, $GISBASE,
$GISDBASE and a couple of others. Type "printenv" and have a look.
Lars Schylberg Email: larss at fmi.kth.se
Dept. of Geodesy and Photogrammetry
Royal Institute of Technology (KTH) Tel. +46 8 790 86 33
S-100 44 STOCKHOLM, SWEDEN Fax. +46 8 790 66 10
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