Using bare-earth LiDAR imagery to reveal the Tahoe - Sierra frontal fault zone Lake Tahoe, California.

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Detailed Description

This video provides a visual example of how airborne LiDAR (Light D etection And Ranging) imagery penetrates dense forest cover to reveal an active fault line not detectable with conventional aerial photography. The video shows an aerial perspective of the range front Mt. Tallac fault, which is one of five active faults that traverse the base of the steep mountains west of Lake Tahoe, California. The USGS has recently published a report in the Bulletin of the Geological Society of America that details the seismic hazards of the Tahoe -Sierra frontal fault zone mapped with the new technology.

Details

Team: USGS

Relevance: LiDAR technology allows one to "see" through dense forest cover, to the bare ground surface, to detect things not visible on traditional aerial photography. This animations compares LiDAR and aerial photography images of the same area.

Method: The animations were generated with a program called QuickTerrain Modeler by Sandra Bond. The still figures are directly from the published report. Kevin Bazar put together the pieces of the video using Adobe After Effects and Adobe Premier Pro.

Start Year: 2008

End Year: 2008

Image Dimensions: 500 x 366

Date Taken:

Length: 01:09:00

Location Taken: Sierra, CA, US