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Ground truth

In cartography and analysis of aerial photographs and satellite imagery, the ground truth is the facts that are found when a location is field checked -- that is, when people actually visit the location on foot.

Aerial photographs, satellite images, and maps can be deceiving, while the ground truth is immutable.

Last updated: 10-10-2005 07:30:08
Last updated: 01-04-2007 01:18:57
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