Simplification method of building polygon based on feature edges reconstruction

• Main Authors: YIN Shuo, YAN Xiaoming, YAN Xiongfeng
• Format: Article
• Language: zho
• Published: Surveying and Mapping Press 2020-06-01
• Series: Acta Geodaetica et Cartographica Sinica
• Subjects: building simplification; feature edge; local reconstruction; right-angle; main direction
• Online Access: http://html.rhhz.net/CHXB/html/2020-6-703.htm

This paper presents an approach to simplify building polygons with blurred outline. Definitions of main direction and feature edges that control overall structure of building polygon are proposed to maintain its regular shape. Firstly, the polygon is squared based on the main direction which is calculated by statistical weighting method. Secondly, the feature edges are grouped and abstracted into several types of local structures with corresponding reconstruction rules after they are found in the right-angled building polygon according to the definition of feature edges. Finally, the spatial relationship of the feature edges in the structure is distinguished to select the right reconstruction rule to simplify polygon. The experiments under real data shows that the method is able to restore the rectangularity of the building polygon effectively, maintain the area and the overall shape structure, and hold high reliability and practicability.