Road network similarity calculation model for map synthesis
A similarity calculation and similarity technology, applied in the fields of cartography and geographic information systems, can solve problems such as difficult to apply road network similarity calculations, and achieve good application value, easy implementation, and scientific certification process
Pending Publication Date: 2022-05-31
LANZHOU JIAOTONG UNIV
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At present, the similarity calculation method for line elements is difficult to apply to the similarity calculation of road networks. Therefore, this invention discloses a road network similarity calculation model oriented to map synthesis, which provides theoretical basis and technical support for realizing automatic synthesis of road networks.
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[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0021] For the study of spatial data similarity, it mainly includes two processes. First, the characteristic indicators of similarity are proposed, then various similarity characteristic indicators are calculated, and finally the result of the overall similarity is obtained by weighting, and the similarity calculation model is established. Flow chart, like figure 1 shown.
[0022] The following is the calculation part of the topological ...
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The invention discloses a map integration-oriented road network similarity calculation model, which comprises the following steps of: (1) establishing a topological quantization table based on the idea of a topological adjacent matrix, and calculating the topological similarity of road networks before and after integration through an element corresponding relation; (2) based on the idea of a one-way Hausdorff distance, measuring and calculating the distance similarity of the road network by using the deviation distance of a line element node and the ratio of the deviation distance to the original length of the element; (3) calculating the geometric structure similarity of the road network according to the regional network sequence and the Pearson correlation coefficient; and (4) establishing an overall similarity calculation model according to the semantic weight tuples, the similarity factor weights and the similarity calculation factors.
Description
technical field [0001] The invention belongs to the field of cartography and geographic information systems, and more specifically relates to a road network similarity calculation model for map synthesis Background technique [0002] Cartography synthesis is an engineering, technology and science that abstracts and summarizes spatial data when large-scale spatial data is reduced to small-scale spatial data. In the development of cartography in the past century, map synthesis is undergoing a process from "subjective judgment" to "quantitative description". However, how to make a good quantitative description of the comprehensive process of the map is a problem that has not been completely solved in the field of cartography. Essentially, the process of generalization and abstraction in map synthesis is a similar transformation process that preserves the main features of the original map. Therefore, to solve the problem of quantitative description in map synthesis, it is nece...
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IPC IPC(8): G06F16/29G06K9/62
CPCG06F16/29G06F18/22
Inventor 闫浩文褚天舒禄小敏
Owner LANZHOU JIAOTONG UNIV