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Roads are significant objects of an infrastructure and the extraction of roads from aerial and satellite images are important for different applications such as automated map generation and change detection. Roads are also important to detect other structures such as buildings and urban areas. In this paper, the road extraction approach is based on Active Contour Models for 1-meter resolution gray level images. Active Contour Models contains Snake Approach. During applications, the roaddoi:10.5194/isprsarchives-xxxix-b4-143-2012 fatcat:npcfxsxgkvcrnkn3w33y3iztve