Drone isn't a naughty word after all.
All maps are wrong. Get used to it! Maps are an abstraction of the real world and as such only approximate reality. Each layer of orthos or LiDAR data comprises dozens, if not millions, of measurements about location.
In this July 2015 issue of POB, read the step-by-step insider details of one company's challenging efforts to cross the Illinois River years after the removal of a railroad bridge.
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