@article{ref1,
title="Measuring and depicting trouble areas in stereomodels",
journal="Highway research record",
year="1973",
author="Norell, Wayland",
volume="452",
number="",
pages="45-54",
abstract="Landslide detection by applying geology and photo interpretation to photogrammetrically produced highway route investigation and design maps is a continuing policy of the Ohio Department of Highways. Federal Highway Administration funds permitted landslide research and development of an air-photo manual relating to this foundation problem. Stereocompilers, who are trained to detect landslides, can earn their entire career salaries by calling attention to slope instability that, if otherwise undetected, would result in a highway embankment failure. Implementation is based on anomalous contour configuration that contradicts normal topographic expression. One unexpected result of the research was detection of a regional troublemaker with a signature, the upper conemaugh red beds. They occur in an arc 100 miles long and 15 to 40 miles wide. As predicted, highway construction provoked numerous back slope slides on the red beds. Further, in the landslide manual, anomalies in the form of bulges were tentatively indicated as potentially more unstable than the visibly sliding slopes. One bulge proved to be the site of one of the worst slides ever involved in a highway cut in Ohio.     Record URL:        http://onlinepubs.trb.org/Onlinepubs/hrr/1973/452/452-006.pdf<p /><p>Language: en</p>",
language="en",
issn="0073-2206",
doi="",
url="http://dx.doi.org/"
}