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phototheodolite
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phototheodolite

measurement instrument
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Quick Summary

A phototheodolite is an instrument that combines a theodolite with a camera, both mounted on the same tripod. This device is used in terrestrial photogrammetry, a method for mapmaking and other applications. The theodolite component is used to measure horizontal and vertical angles, allowing for precise alignment with sighted objects. The camera captures photographs from stations with known positions and elevations. By taking a series of photographs from several such stations, detailed maps and measurements can be created.12

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