created with command line: spfinalize -i saint_helens.files -ilof -ilas -ospb -level 8 | \ spdelaunay2d -ispb -osmb | \ tin2dem -ismb -opng -zone 10S -ellipse 23 -step 2 -kill 1000 -tiling_ns saint_helens 500 -ll 553000 5110000 data available here: http://wagda.lib.washington.edu/data/type/elevation/lidar/st_helens/toutle03.html http://www.cs.unc.edu/~isenburg/googleearth/raster/saint_helens/saint_helens.files converted to LAS format with LAStools available here: http://www.cs.unc.edu/~isenburg/lastools/ download executables and sources here: http://www.cs.unc.edu/~isenburg/googleearth/