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Tue 03 Mar 2010Airborne laser scans used to map State
THE ORDNANCE Survey of Ireland (OSI) is rolling out a project to map the State using Lidar – a technology which employs airborne laser scanning to build up three-dimensional models of the terrain below.
While ordinary aerial photographs give only a two-dimensional image, Lidar uses millions of light beams to detect different layers such as ground level, building height and vegetation coverage.
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