Planimetric maps are digital, graphic maps that portray the horizontal position of planimetric features using lines and symbols. Ground control is set for this product. Aerotriangulation is performed to determine the position and orientation of the camera for each exposure so planimetric features are shown in their true relative coordinate position.
source: http://www.ncdot.org/doh/PRECONSTRUCT/highway/photo/Products/Planimetric_maps_default.html
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