• 中国计算机学会会刊
  • 中国科技核心期刊
  • 中文核心期刊

J4 ›› 2014, Vol. 36 ›› Issue (02): 226-232.

• 论文 • 上一篇    下一篇

一种面向服务器制图可视化的矢量数据多尺度组织方法

孙璐1,陈荦1,刘露1,苏德国2   

  1. (1.国防科学技术大学电子科学与工程学院, 湖南 长沙 410073;2.中国测绘科学研究院,北京 100830)
  • 收稿日期:2013-07-08 修回日期:2013-09-13 出版日期:2014-02-25 发布日期:2014-02-25
  • 基金资助:

    国家863计划资助项目(2011AA120305,2011AA120306)

A multi-scale management method for visualization of vector data on server cluster            

SUN Lu1,CHEN Luo1,LIU Lu1,SU Deguo2   

  1. (1.College of Electronic Science and Engineering,National University of Defense Technology,Changsha 410073;
    2.Chinese Academy of Surveying and Mapping,Beijing 100830,China)
  • Received:2013-07-08 Revised:2013-09-13 Online:2014-02-25 Published:2014-02-25

摘要:

提出了一种面向服务器制图可视化的矢量数据多尺度组织方法。基于矢量数据瓦片化思想,将矢量数据按照全球地理空间金字塔索引模型划分为层次化瓦片数据,将服务器制图可视化处理中对数据图层的空间查询操作,转化为对瓦片数据的数据读取操作。实验及应用表明,该方法减少了数据读取时间,降低了I/O代价,提高了矢量数据服务器制图可视化的整体性能。

关键词: 矢量数据, 多尺度, 制图可视化, 球面墨卡托, 矢量瓦片

Abstract:

A multi-scale management method for visualization of geographic vector data on server cluster is proposed. Based on the idea of vector data tiling, a global tilepyramid index model is established. Then, the vector dataset is divided into individual vector tiles according to the index structure. When rendering tiles on servers, the tiled dataset acts as the feature data source so as to avoid doing spatial query on the raw dataset on the fly. Experimental results indicate that the proposed method can reduce the time of data preparation and the cost of I/O when rendering a tile image, and consequently promote the performance of geographic vector data visualization.

Key words: vector data;multi-scale;visualization;spherical Mercator;vector tile