Using the same LiDAR DEM from which we generated the contours, we can create hillshade tifs using  http://www.perrygeo.net/wordpress/?p=7.  It compiles easily on a mac, probably even easier on a Linux machine following his directions.  Then another simple loop: #!/bin/bash x=0 for f in $( ls *.txt); do x=`expr $x + 1` echo $x $f hillshade $f $f.tif done I’d like this all in a single … Continue reading Hillshade using PerryGeo’s ported GRASS utility