Open AccessGeneralization of transport networks for multiscale mapping
Author(s) -
Timofey Samsonov,
Evgeniia Prokhorova
Publication year - 2019
Publication title -
izvestiâ rossijskoj akademii nauk. seriâ geografičeskaâ
Language(s) - English
Resource type - Journals
eISSN - 2658-6975
pISSN - 2587-5566
DOI - 10.31857/s2587-556620191107-117
Subject(s) - overlay , computer science , generalization , python (programming language) , cartographic generalization , position (finance) , data mining , digital mapping , transport network , theoretical computer science , cartography , geography , mathematics , programming language , finance , economics , mathematical analysis , computer network
The article presents an approach to the generalization of transport networks on multiscale maps, based on the automated derivation of transport corridors. The logical connection between the concept of a polymagistral as a way of representing spatially conjugated sections of transport routes of various types and the process of generalization of a cartographic image is shown. A four-level specification of levels of detail has been developed for multiscale maps of transport networks, in which the position of polymagistral routes is placed at the third and fourth levels of detail. A formal definition of a polymagistral route and a compact polymagistral route is given. Based on the definition, a GIS technology for extracting polymagistral routes based on spatial integration of linear objects and overlay operations (spatial overlay) was proposed. Algorithmic description of the proposed technology has been developed and then implemented using Python programming language. Using the railways and roads from 1:1 000 000 and 1:2 500 000 digital general maps, the extraction of polymagistral routes was tested, followed by the analysis of similarity between expert and automatically obtained results. The influence of the search distance on the spatial coverage of the polymagistral routes has been investigated, and their geographical characteristics are given. The ways of development and improvement of the proposed approach are outlined in the conclusion.