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A Map Drawing Method Based on Vector Tiles

A map drawing and tile technology, applied in the field of map drawing based on vector tiles

Active Publication Date: 2020-08-11
NAT GEOMATICS CENT OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a map drawing method based on vector tiles, which supports multi-source heterogeneous data, is easy to operate, and can effectively solve the problems of annotation misalignment and edge cutting on the basis of high-resolution vector tile drawing

Method used

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  • A Map Drawing Method Based on Vector Tiles
  • A Map Drawing Method Based on Vector Tiles
  • A Map Drawing Method Based on Vector Tiles

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Embodiment Construction

[0047] 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 are only It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making...

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Abstract

The invention provides a vector tile-based map drawing method, which reads map drawing parameters; calculates the map drawing parameters and transforms coordinates to generate a map canvas; and determines whether the map layer data parameters exist in the local data source information table. , if it exists, the map layer data parameters that exist in the local data source information table will be used as local data; if it does not exist, the map layer data parameters that do not exist in the local data source information table will be used as online data ; Obtain database data and vector tile set data from local data and online data respectively; add database data and vector tile set data to the corresponding layers in the map canvas, and draw the map. The method of the invention supports multi-source heterogeneous data, is simple to operate, and can effectively solve the problems of annotation misalignment and edge cutting based on high-resolution vector tile drawing.

Description

technical field [0001] The present invention relates to the technical field of tile maps, in particular to a method for drawing maps based on vector tiles. Background technique [0002] With the continuous development of the national economy and the continuous enrichment and improvement of national basic geographic information data, maps, as the carrier of data information visualization, play an increasingly important role in the decision-making of superiors. Map drawing is mainly based on raster tile and vector tile technology. However, the geographic element style of raster tile technology is not easy to update and it is not easy to obtain high-resolution maps. In practice, vector tile technology is often used. [0003] The implementation plan is generally to first determine the required tiles according to the actual geographical area, then render each tile separately into a picture and stitch it together, and finally capture the actual image size for output. This soluti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T11/20G06T3/00G06F16/29G06F16/245G06F16/28
CPCG06F16/245G06F16/284G06F16/29G06T11/206G06T3/12G06T3/06
Inventor 周治武孙勋王云帆
Owner NAT GEOMATICS CENT OF CHINA