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Northern California's San Andreas fault zone is mapped via airborne laser swath mapping (ALSM) data. The dataset contains a LIDAR point cloud and two 6-foot grid digital elevation models (highest-surface and bald Earth). NASA and the USGS collaborated on the acquisition, with data collected in 2003.
Elevation images store undefined grid cells as -99. File naming convention includes quadrangle name, north/south half, bald Earth/highest-surface type, and elevation/shaded relief designation.