Prism (surveying)
![](../I/m/Prism_Target_used_with_survey_equipment.jpg)
A typical prism with back target. Used with survey and 3D point monitoring systems to measure changes in elevation and position of a point.
In surveying, a prism is a corner cube or retroreflector, normally attached on a surveying pole, used as a target for distance measurement using, for example, a total station.
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