ASTER topography
Steps to import ASTER GDEM tiles in GRASS:
# save downloaded zip files in one directory # enter in directory and unzip files at once unzip "*.zip" # create WGS84 location, import elevation (=dem) and quality (=num) tiles in PERMANENT mapset for GDEM in *.tif ; do r.in.gdal in=$GDEM out=`basename ${GDEM} .tif` done # match region to extent of imported gdem tiles g.region rast=`g.mlist pat=AST*dem sep=,` -p # patch tiles in one map r.patch in=`g.mlist pat=AST*dem sep=,` out=aster_gdem # assign color rules r.colors aster_gdem color=terrain
Note: working on color rules that replicate NASA's "GDEM press colorized topo" published at "Mission News"