What Next: Urban Mapping Down to the Doorknob
Philadelphia has long been at the cutting edge of municipal use of geographic information systems. And a recent pilot project that employed LIDAR-collecting robots has convinced even the city’s skeptical GIS director of the value of moving beyond 2D maps to the 3D models that LIDAR enables.
In 2008, the city decided to use some available grant money to launch a project to scan its Center City area with LIDAR and combine it with existing oblique imagery data. Oblique imagery is aerial photography captured at an angle that shows the top and sides of objects.
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