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Classification and Application of Context Information in Road Extraction

MA Li1, 2, CHEN Jun2 School of Remote Sensing and Information Engineering, Wuhan University, Wuhan 430079, China; 2.National Geomatics Center of China, Beijing 100044, China)  
Context is one of the most important characteristics of road. Context information is getting more attention in the process of road extraction in recent years. This paper summarizes different types of the context information and the way to getting it. According to the roles for road extraction, three application types are induced. A case study is analyzed at last.
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