Research and practice of real-time map tile service based on QGIS
Abstract:GeoServer is an excellent open source software for map services, but
its maps are not very powerful, and the tiles are not very elegant. QGIS is another
high performance open source GIS software, which has a strong ability of map
symbolization. Therefore, this paper uses QGIS to draw map tiles, and uses
GeoServer to conduct tile service release.
In this paper, the structure of QGIS is studied first, and a global block pyramid
model with 32 layers is designed. Then drawing of single tile and the parallel
rendering of tile are tested. Then the software is designed and implementated,
developed a powerful software prototype. The software is not only available for
GeoServer calls, but also for most Win32 program calls. It embodies the idea of
software reuse.
Key words: Tile pyramid model; Real-time rendering of tiles; Tile service; GeoServer
interface
1 引言.............................................................................................................................1
1.1 背景和意义................................................................................1
1.1.1 研究背景.................................................................................................1
1.2 研究进展和主要方法...................................................................2
1.3 主要内容和结构安排...................................................................3
1.3.1 主要内容.................................................................................................3
1.3.2 结构安排.................................................................................................3
2 QGIS 体系结构研究...................................................................................................4
2.1 QGIS 简介................................................................................4
2.2 QGIS 工程结构概述....................................................................5
2.3 QGIS 具体结构分析....................................................................5
2.4 QGIS 渲染组成..........................................................................8
3 地图瓦片金字塔构建及渲染...................................................................................10
3.1 瓦片金字塔模型.......................................................................10
3.2 利用 QGIS 渲染单个瓦片...........................................................12
3.3 瓦片并行化渲染.......................................................................13
4 软件设计及安装部署...............................................................................................14
4.1 总体设计.................................................................................15
4.2 详细设计.................................................................................16
4.2.1 瓦片渲染器设计...................................................................................16
II
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