SVG (scalable vector graphics) map data loading method, device and system

Abstract

The invention discloses an SVG (scalable vector graphics) map data loading method, device and system. Map data are loaded through an application layer; a data acquisition request is sent to a server;the data acquisition request is not to acquire all map data but to incremental map data; updating map attributes is required in accordance with the request; map area elements and map POI (point of interest) elements are screened; SVG map data are generated through all the data so that the application layer performs loading according to the returned SVG map data; it can be seen that a dynamic creation mechanism of incremental map data can ensure efficient recognition, creation and return of SVG map data; since the map data are subjected to incremental loading, data acquisition response time isshortened; graphics rendering pressure is relieved, so that map loading efficiency is greatly improved and smooth user experience is provided.

Description

technical field [0001] The present invention relates to vector map loading technology, more specifically, to a method, device and system for loading SVG map data. Background technique [0002] Vector map is a common method of map expression, which has the advantages of compact data structure, low redundancy, high expression accuracy, good graphic display quality, and is conducive to network and retrieval analysis. SVG (Scalable Vector Graphics, Scalable Vector Graphics) is a graphic format that uses XML (Extensible Markup Language, Extensible Markup Language) to describe two-dimensional graphics, developed by W3C (World Wide Web ConSortium, Internet Standards Organization), It is a new generation vector graphics standard for the Internet. With the advantages of rich element definitions, good readability and interactivity, full support for DOM (Document Object Model), and extensive user base, SVG has become an effective way to build vector maps at low cost and quickly. [0...

AI Technical Summary

Problems solved by technology

[0003] At present, most SVG maps are stored in the form of files or in databases, and all map data are directly displayed when using them. When faced with a large amount of map data loading, it often occurs that map data acquisition is time-consuming and graphics rendering efficiency is low, which causes serious problems for users. bad experience

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