Abstract
In this paper, based on high resolution remote sensing image and the corresponding civil areas of digital topographic map, by using modules and effective classification method of ENVI software and ARCGIS software, by calculating the shadow of one building to obtain the height of it in city. Practice has proved that this method brings small workload, owns simple process, and can basically meet the needs of a city’s reference requirements of relevant disaster preventions and mitigations planning. It has practical value.
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