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Photogrammetric datum
(1) A surface, usually flat, to which elevations in the region being studied are referred. The surface is usually taken as nearly horizontal as possible. (2) The plane, corresponding to the surface in the first definition, in a stereoscopic model or photogrammetric instrument, to which heights or elevations are referred. Sometimes referred to simply as model datum or datum.
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- Part of Speech: noun
- Synonym(s):
- Blossary:
- Industry/Domain: Earth science
- Category: Mapping science
- Company: American Congress on Surveying & Mapping
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