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PHOTOGRAMMETRIC CONTROL SURVEYS
Photogrammetric Mapping is the art of mapping using by using aerial or terrestrial photographs. These photographs are taken with very sophisticated cameras using large format negatives. In
order for the Photogrammetrist to take measurements from these photos there has to be some correlation of the photos with what is on the ground.
This may be done by laying down targets prior to the taking of the photographs. The targets are then connected by very accurate measurements to give the Photogrammetrist a “baseline” to use
to relate his or her measurements on.
The other method is to locate specific objects after the photos are taken in much the same way.
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