Computer Engineering and Applications ›› 2007, Vol. 43 ›› Issue (21): 153-156.

• 网络、通信与安全 • Previous Articles     Next Articles

Research of Web-based progressive spatial vector transmission

HUANG Hao-sheng1,LI Yan1,2,XIAO Xin3   

  1. 1.Computer School,South China Normal University,Guangzhou 510631,China
    2.Spatial Information Research Center,South China Normal University,Guangzhou 510631,China
    3.Changqing University of Posts and Telecommunication,Chongqing 400065,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2007-07-21 Published:2007-07-21
  • Contact: HUANG Hao-sheng

基于网络的空间矢量信息渐进传输的研究

黄浩生1,李 岩1,2,肖 昕3   

  1. 1.华南师范大学 计算机学院,广州 510631
    2.华南师范大学 空间信息技术与应用研究中心,广州 510631
    3.重庆邮电学院 传媒艺术学院,重庆 400065
  • 通讯作者: 黄浩生

Abstract: This paper focuses on progressive vector transmission based on B/S.Progressive vector transmission based on map generalization and multi-scale representation is proposed.It consists of three parts:map generalization,multi-scale representation of spatial data,and implementation of progressive transmission.This paper also discusses how to choose the threshold of DP algorithm,selection,and way to store the data.At last,the paper discusses the implementation of progressive transmission of Guangzhou’s regionalism based on SVG,the results prove that the method we proposed useable and effective.

Key words: progressive vector transmission, map generalization, DP algorithm, multi-scale representation, adaptive zooming

摘要: 基于网络的空间矢量信息发布,仍存在大数据集浏览效果差强人意的问题,渐进传输是解决该问题的关键技术之一。在对空间矢量信息渐进传输的内在条件进行分析后,认为基于空间多尺度表达的渐进传输符合空间信息可视化的基本原则,而多尺度表达与空间信息概化关系密切。文章提出了基于空间信息概化和多尺度表达的渐进传输综合解决方案,该方案包括三个部分:采用空间信息概化方法获得不同尺度的地图;遵循多尺度表达的原则,运用结点LoD模型对不同尺度的地图进行处理和存储;综合Web Services、Plug-in和JavaScript脚本等技术设计、实现渐进传输体系结构。最后,文章基于新一代网络图形图像发布标准SVG,以广州市行政界线图为例在B/S模式下进行渐进传输实验,进一步评价了渐进传输综合解决方案在处理大数据集传输和自适应缩放等方面的可行性及有效性。

关键词: 渐进传输, 空间信息概化, DP算法, 多尺度表达, 自适应缩放