[GRASS-user] GRASS Location from scratch: Solved

["Peter Löwe"]

Hi,

here is a working (bash-)scripting approach on how to conjure up a minimalistic xy-location out of thin air and to transmogrify the projection (f.e. EPSG:4326):

###################################################################################
## LOCATION SETUP PREPARATION (FILESYSTEM)

#generate folders for temporal LOCATION and MAPSET
mkdir -p $CURRENT_DIR/$THE_LOCATION/$THE_MAPSET
mkdir -p $CURRENT_DIR/$THE_LOCATION/$THE_MAPSET/dbf
touch $CURRENT_DIR/$THE_LOCATION/$THE_MAPSET/MYNAME

echo "proj:       0
zone:       0
north:      1
south:      0
east:       1
west:       0
cols:       1
rows:       1
e-w resol:  1
n-s resol:  1
top:        1
bottom:     0
cols3:      1
rows3:      1
depths:     1
e-w resol3: 1
n-s resol3: 1
t-b resol:  1
" > $CURRENT_DIR/$THE_LOCATION/$THE_MAPSET/WIND

cp $CURRENT_DIR/$THE_LOCATION/$THE_MAPSET/WIND $CURRENT_DIR/$THE_LOCATION/$THE_MAPSET/DEFAULT_WIND

echo "DBF_DRIVER: dbf
DB_DATABASE : $GISDBASE/$LOCATION_NAME/$MAPSET/dbf/
" > $CURRENT_DIR/$THE_LOCATION/$THE_MAPSET/VAR

##################################################################################
#Set up a temporary grassrc-File:

echo "GISDBASE: $CURRENT_DIR
LOCATION_NAME: $THE_LOCATION
MAPSET: $THE_MAPSET
" > $TMPDIR/$THE_GRASSRC




#################################################################################
# Export paths to GRASS binaries and libraries:

 export GISBASE=/opt/grass
 export PATH=$PATH:$GISBASE/bin:$GISBASE/scripts
 export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$GISBASE/lib

 # use process ID (PID) as lock file number:
 export GIS_LOCK=$$

 # settings for graphical output to PNG file
 export GRASS_PNGFILE=$TMPDIR/grass6output.png
 export GRASS_TRUECOLOR=TRUE
 export GRASS_WIDTH=400
 export GRASS_PNG_COMPRESSION=1

 # path to GRASS settings file:
 export GISRC=$TMPDIR/$THE_GRASSRC

g.proj -c epsg=4326
g.region -s  n=90 s=-90 w=-180 e=180 res=1
g.region -p



Peter
-- 
Dr. Peter Löwe
<peter.loewe at gmx.de>





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