.NET下移动GIS的SVG组件设计与实现

针对移动GIS客户端设备CPU、内存、网络带宽能力有限的特点,以文件小、传输速卒高、无极缩放、跨平台的Mobile SVG为基础,进行空间数据组织和编码.利用.NET技术将图形和属性数据分开管理,减少了建立数据结构时间和内存占用量,实现了SVG文档的解析、渲染、查询与操作功能.最后设计了基于SVG和.NET技术的移动GIS组件,在一定程度上解决了GIS空间数据结构复杂、数据量大与移动设备能力有限的矛盾.

Design and Implementation for SVG Components of Mobile GIS Based on .NET

According to limited capacity(low CPU frequency,small memory and narrow bandwidth of network) of Mobile GIS client devices,the spatial data were organized and encoded in this paper based on the Mobile SVG which has small files and high transmission efficiency,can infinitely zoom in or out and can be run in multi-platform.Spatial data and attribute data were separately managed by using.NET Compact Framework,thus,both the used memory and the time on creating data structure were reduced,and the functions of an...