DEM Grayscale Maps

Bapper and I have been messing with USGS Digital Elevation Model (DEM) data for a bit trying to get good pictures out of them. Let this be an example of how far free software can take you.

A mosaic of images covering northern California (about 1.4M) -- These are shown at 1/3 actual size (that is, 2/3 of the data from the DEM is missing in these images!) If these were shown at full resolution, they would form an image 6000x3600 pixels in size!

A smaller version of the same (400K)

An even smaller version of the same (45K)

Map of the San Francisco Bay Area (180K)

A rendered view of Mount Shasta (25K)

A rendered view of the Chico-W quadrangle (40K)

A rendered view of Northern California (88K)

Some source code that we used to generate these images