Acta Geodaetica et Cartographica Sinica ›› 2025, Vol. 54 ›› Issue (3): 563-576.doi: 10.11947/j.AGCS.2025.20240138

• Cartography and Geoinformation • Previous Articles     Next Articles

A method for automatic buildings aggregation constrained by proximity edges

Youneng SU1(), Qing XU1(), Qun SUN1, Xinming ZHU1, Fubing ZHANG1, Bo LIU2   

  1. 1.Institute of Surveying and Mapping, Information Engineering University, Zhengzhou 450001, China
    2.School of Surveying and Geoinformation Engineering, East China University of Technology, Nanchang 330013, China
  • Received:2024-04-25 Online:2025-04-11 Published:2025-04-11
  • Contact: Qing XU E-mail:youneng_2000@163.com;xq1982_no.1@163.com
  • About author:SU Youneng (2000—), male, postgraduate, majors in geographic knowledge graph and automatic generalization of maps. E-mail: youneng_2000@163.com
  • Supported by:
    The National Natural Science Foundation of China(42161064)

Abstract:

Aggregation of large scale buildings is a difficult problem in the field of map generalization. In order to maintain the characteristic consistency of the building's shape before and after the aggregation, a method for automatic buildings aggregation constrained by proximity edges was proposed in this paper. The method firstly used the Delaunay triangulation networks to determine the proximity relations between buildings, generated the proximity edges of buildings with the constraint of the minimum bounding rectangle of buildings, and divided the spatial structural relations of buildings into the alignment types and the dislocation types according to the projection proportions of the minimum external rectangles of buildings. Secondly, the proximity edges interactive projection method and the proximity edges angular bisector method were proposed for the combination of the aligned and the dislocated buildings, respectively. Finally, the validity of the proposed method was verified with the experimental data of Shanghai residential land. The results showed that the proposed method could effectively merge buildings under different structural relations and merging thresholds, and effectively expressed the spatial structural characteristics and the right-angle characteristics of residential lands under the control of a certain area increment.

Key words: map generalization, building aggregation, proximity edges, spatial structure, multi-scale expression

CLC Number: