| 基于.NET嵌入式地图浏览器的设计与实现 |
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| 引用本文： | 霍亮,林永恒.基于.NET嵌入式地图浏览器的设计与实现[J].测绘科学,2009,34(1). |
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| 作者姓名： | 霍亮 林永恒 |
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| 作者单位： | 北京建筑工程学院,测绘与城市空间信息学院,北京,100044 |
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| 基金项目： | 北京市教委科研面上资助项目，北京市教委人才强教项目，北京建筑工程学院博士科研启动基金 |
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| 摘 要： | 本文分析了国内外嵌入式GIS系统开发的现状,并在此基础上,设计了嵌入式地图浏览器。其实现过程着重于几个关键技术:充分利用现有资源,基于SHP数据格式,对其进行预处理后移植到嵌入式GIS系统中;构造基于.net平台环境下多尺度数字地图的数据模型;建立适用于嵌入式GIS系统改进的四叉树空间索引,提高空间查询的效率;优化嵌入式GIS系统中的数据访问,加快电子地图显示和查询的速度;实现适合屏幕浏览的移动注记。
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| 关 键 词： | 地理信息系统 分层显示技术 四叉树 移动注记 嵌入式地图 |
Development and design of embedded map view based on. NET |
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| HUO Liang,LIN Yong-heng.Development and design of embedded map view based on. NET[J].Science of Surveying and Mapping,2009,34(1). |
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| Authors: | HUO Liang LIN Yong-heng |
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| Abstract: | This article,with some actual project,mainly studies the embedded spatial data Visualization,together with the design and realization of embedded map view effectively,based on the theory of GIS,Computer Graphics,Computer Science,SHP Data,etc.It discusses some of primate technologies about the embedded map view:Transplanting the general-purpose electronic maps data in PC to Handheld PC to make use of existing resource adequately and reduce the difficulty of building electronic map;Bring forwarding the model of multi-scale digital map based on PDA platform;Based on SHP data,Building the quadtree applying to the Embedded MapView to improve the search efficiency of the whole quadtree;Optimizing the data access in the Embedded Map View to improve the speed of the electronic map display and searching;Realizing the self-adaptive labeling to the following effect.For those elements visible in the current windows,the system can adjust the positions of their labels and show the labels in the current screen with a good visual expression. |
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| Keywords: | mobile annotation LOD GIS embedded map quad tree |
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