Abstract
A fully analytical stereoplotter has been acquired by the Bonneville Power Administration to reduce the time and costs required to survey transmission lines for engineering design. Two major transmission line projects have recently been surveyed photogrammetrically using the analytical stereoplotter. Costs in terms of man-hours to perform several types of surveys by field survey crews, mechanical reconstruction stereoplotters and the analytical stereoplotter are compared and discussed. The analytical instrument has been found to be highly cost effective for specialized types of surveys requiring frequent re-setting of models of photographic stereopairs.
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