BUILDING FOOTPRINT EXTRACTION FROM HIGH RESOLUTION REMOTE SENSING DATA- A CASE STUDY ON AYYAPPANKOVIL, ELAPPARA AND UPPUTHARA VILLAGES (IDUKKI DISTRICT, KERALA)

摘要

Delineating different types of physical and cultural features present in the earth is the important part of remote sensing and image analysis. The study carried out is to extract building footprints along flood prone zones for the village Ayyappankovil, Elappara and Upputhara, Idukki district, Kerala. First the image is split and merged together using segmentation process, and then various raster processes were applied such as probability, Reclump, Dilate, Erode and size filter etc. Then the Raster image is converted into vector file and cleanup process was applied like Generalize, smooth and Vector probability filter to get desired output. Finally, settlements from respective villages are digitized to know the accuracy of extraction.