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Flood simulation is one of the emerging applications for laser altimetry data. Very high vertical accuracy of the digital surface model is required for the simulation to give meaningful results. Laser altimetry is able to deliver sufficiently accurate surface data rapidly and efficiently. This image shows a flood simulation for the city of Bonn. The river Rhine on the left occasionally rises above its banks to cause substantial damage to the surrounding area. In this picture a simulated flood situation (lighter blue) has been superimposed over the normal status (darker blue). It becomes obvious from this simulation which buildings and streets are most endangered by inundation. This type of data can therefore be used to design effective countermeasures. |
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