GIS Files 4: Putting it all in a system

4.5: Some simple GIS examples (2)

Flood risk

Modeling water levels using 3-D height data and map data

Using 3-D height data and map data for river features it is possible to build a computer model of changing water levels; this can be used for predicting flood patterns and identifying areas in danger. By combining this model with address data, the likelihood of individual properties being flooded can be assessed. This is not just of environmental concern but of great value to insurance companies.

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