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A rendering method and device for a vector electronic map

An electronic map and vector layer technology, applied in the directions of maps/plans/charts, educational appliances, instruments, etc., can solve problems such as excessive data requests, incomplete data rendering at tile edges, and rendering cover, etc. Avoid edge problems, easily render cover problems, and reduce the effect of data requests

Active Publication Date: 2022-03-25
NAVINFO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solved the problems of excessive data requests, incomplete data rendering at the edge of tiles and rendering cover

Method used

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  • A rendering method and device for a vector electronic map
  • A rendering method and device for a vector electronic map

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Embodiment Construction

[0016] In order to make the objectives, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below with reference to the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0017] figure 1 A schematic flowchart of an embodiment of a method for rendering a vector electronic map provided for this application, the schematic flowchart includes:

[0018] Step 105, merge data requests of different vector layers according to data sources, and send tile data requests to the server according to the number of...

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Abstract

The present application discloses a method and device for rendering a vector electronic map. The method includes: merging data requests for different vector layers according to data sources, sending tile data requests to the server according to the number of data sources; receiving requests from The tile data of the server; render the vector electronic map according to the tile data. The beneficial effects obtained by the present application are that the rendering efficiency of the vector electronic map is improved; the problem of incomplete rendering at the edge of tiles is avoided and reduced; and the problem of rendering capping can be solved more easily.

Description

technical field [0001] The present application relates to the field of electronic maps, and in particular, to a method and device for rendering a vector electronic map. Background technique [0002] Vector map tiles are a novel pattern. The map data will be transmitted to the browser in chunks in json and other formats, and the front-end framework will be used to display the map on the browser. Now more and more electronic maps use tile technology. Commonly used electronic map Javascript libraries, such as OpenLayers, Leaflet, etc., usually use tile layer rendering to render vector data. The tile layer is to divide a layer into multiple fixed-size tiles, each tile is a complete rendering unit, and since each tile is drawn independently, a tile has a small canvas (HtmlCanvas) , when the rendering result with vector data exceeds the canvas of the tile where it is located, the excess part will not be displayed, resulting in incomplete drawing at the edge of the tile. Modern...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09B29/00
CPCG09B29/006
Inventor 徐杰陈晓晓
Owner NAVINFO