A method for merging buildings on topographic maps

A technology of buildings and topographic maps, which is applied in the field of geographic information systems, can solve problems such as ignoring buildings and loss of merging results, and achieve high filtering efficiency and effect, and ensure rationality

Active Publication Date: 2020-02-11
CHINESE ACAD OF SURVEYING & MAPPING
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Problems solved by technology

[0004] Surface synthesis with the help of Delaunay triangulation provides a solution for the automatic merging of building polygons, but there are still some shortcomings: some methods discuss the merging of general surface targets when merging faces, and do not take into account the building polygons. As a special face, it has a right-angled feature, which is lost in the merged result

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  • A method for merging buildings on topographic maps
  • A method for merging buildings on topographic maps
  • A method for merging buildings on topographic maps

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Embodiment Construction

[0069] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0070] In order to overcome the deficiencies in the prior art, the embodiment of the present application provides a method for merging buildings on topographic maps, which can classify and filter triangles from various angles to determine the spatial proximity of buildings, thereby ensuring cluster analysis rationality. At the same time, the brid...

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Abstract

The embodiment of the present invention discloses a method for merging buildings on topographic maps. The method includes: A. taking data with spatial distinguishing characteristics as limiting elements, and dividing building data into data of each area; B. for each Described area: B1, establish the corresponding C-Delaunay triangulation of each building data in this area; B2, classify and filter each triangle in the triangulation according to the measurement characteristic; B3, remaining triangle after described filtering Perform clustering, obtain the outer boundaries of each triangular network formed by the clustering to form each bridging polygon; B4, perform right-angle processing on the bridging polygons, and fuse the processed bridging polygons with their associated buildings. From the above, the present application maintains the right-angled feature of the combined result by performing right-angle processing on the bridging polygons.

Description

technical field [0001] The invention relates to the field of geographic information systems, in particular to a method for merging buildings on topographic maps. Background technique [0002] Buildings are the core elements of large-scale urban topographic maps, which have an important impact on the effect of map expression. As one of the difficulties in the synthesis of large-scale topographic maps, the merging of building polygons has always been a research hotspot in the field of cartographic synthesis at home and abroad. Different methods and strategies have emerged: scanning expansion search, convex hull evolution method and similar methods based on mathematical morphology The method is suitable for image data, that is, raster data. The vector-to-raster conversion process is required to complete the data processing of the vector format. The merging process is a bit complicated, and the merging result may have a large curvature in shape and the accuracy problem will affe...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T3/40G06K9/62
CPCG06T3/4038G06F18/2321G06F18/2431
Inventor 李成名殷勇郭沛沛吴伟王伟陈燕妮印洁
Owner CHINESE ACAD OF SURVEYING & MAPPING
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