created with command line: spfinalize -i grbm.txt.gz -ospb | \ spdelaunay2d -ispb -osmb | \ tin2dem -ismb -o grbm.png -zone 18S -ellipse 11 -kill 1000 -tiling_ns grbm 500 -ll 352000 4370000 data available here: send email to isenburg@cs.unc.edu download executables and sources here: http://www.cs.unc.edu/~isenburg/googleearth/