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Ground Failure

LIDAR Imagery of the San Andreas Fault zone at the Vedanta and Olema Ridge Paleoseismic Trench sites, Pt. Reyes, CA

Tina M. Niemi1, Robert Kayen2, Hongwei Zhang1 Christopher R. Dunn1, David M. Doolin3

1University of Missouri-Kansas City, Dept. of Geosciences, 5100 Rockhill Road, Flarsheim Hall 420, Kansas City, MO 64110-2499
2U.S. Geological Survey, MS999, 345 Middlefield Road, Menlo Park, CA 94025
3Department of Civil and Environmental Engineering, University of California at Berkeley, 2108 Shattuck Ave., Berkeley, CA 94720-1716;; 510-642-0777

Index Back to Geotech Home Page About These Web Pages Summary Olema Ridge Trench Color Channel & Intensity Models of the Trench Wall Vedanta Ranch Trench Abstract Photo of lidar scanner at the Olema Ridge trench

Tripod-mounted LiDAR system at the Vedanta Ranch trench.


This poster documents our efforts to precisely record the location, morphology, and image of two trench study sites on the San Andreas fault. We use ground-based LiDAR to preserve records of the trenches and exposed fault breaks in soil. Substitute-color analysis is being used to enhance and extract details of the fault break not visible in natural color and light intensity. Point cloud filtering techniques are used to ‘de-vegetate’ the modern landscape so we can view the ‘bald’ scarp as G.K. Gilbert did in 1906 

Abstract | Vedanta Ranch Trench | Color Channel & Intensity Models of the Trench Wall | Olema Ridge Trench | Summary
About These Web Pages | Geotech Home Page

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maintained by Diane Minasian
For further information PLEASE CONTACT: Robert Kayen
last modified 12 April 2005

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