| 一种面向服务器制图可视化的矢量数据多尺度组织方法 |
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| 引用本文： | 孙璐,陈荦,刘露,苏德国.一种面向服务器制图可视化的矢量数据多尺度组织方法[J].计算机工程与科学,2014,36(2):226-232. |
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| 作者姓名： | 孙璐 陈荦 刘露 苏德国 |
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| 基金项目： | 国家863计划资助项目（2011AA120305，2011AA120306） |
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| 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。
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| 关 键 词： | 矢量数据 多尺度 制图可视化 球面墨卡托 矢量瓦片 |
| 收稿时间： | 2013-07-08 |
| 修稿时间： | 2014-02-25 |
A multi-scale management method for visualization of vector data on server cluster |
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| SUN Lu,CHEN Luo,LIU Lu,SU De guo.A multi-scale management method for visualization of vector data on server cluster[J].Computer Engineering & Science,2014,36(2):226-232. |
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| Authors: | SUN Lu CHEN Luo LIU Lu SU De guo |
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| Affiliation: | （1.College of Electronic Science and Engineering,National University of Defense Technology,Changsha 410073；
2.Chinese Academy of Surveying and Mapping,Beijing 100830,China） |
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| 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. |
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| Keywords: | vector data multi-scale visualization spherical Mercator vector tile |
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