基于数据库综合和SVG的网络制图综合系统研究  

Web cartographic generalization based on database generalization and SVG

作　　者：杨现坤[1] 崔伟宏[1] 

机构地区：[1]中国科学院遥感应用研究所,北京100101

出　　处：《计算机应用》2009年第1期201-204,共4页journal of Computer Applications

摘　　要：针对网络制图综合效率低和基于网络的不同详细程度的空间数据的自动生成问题,提出了一种应用z-value空间索引机制实现网络空间数据制图综合的方法。该方法可以有效地过滤无关的空间数据,为不同的应用生成恰当的细节层面,并且有效地提高空间数据网络传输的效率。在客户端采用可缩放矢量图形(SVG)技术显示,该方法读写速度快,易于进行编辑和修改,在显示速度和交互性方面表现不俗。测试表明该方法比传统方法更有效。A new approach using spatial indexing mechanism called z-values was proposed in order to improve the efficiency of Web cartographic generalization and represent spatial data with different scales. The method can effectively filter unrelated spatial data and derive spatial data with proper level of details. So this approach can effectively improve the efficiency of spatial data transmission across the Internet. The application server pushes vector descriptions to an SVG client for displaying. An SVG file can he edited effectively in simple text editors and can be generated easily from server-side tools. In addition to faster download speeds, the SVG＇s interoperahility is also demonstrated. The experiment shows our approach is more efficient than the traditional one.

关 键 词：网络制图综合 z—value 可缩放矢量图形 

分 类 号：TP311.132[自动化与计算机技术—计算机软件与理论]