| 空间索引与多尺度表达的一体化模型研究 |
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| 引用本文： | 马亚明,徐杨,张江水.空间索引与多尺度表达的一体化模型研究[J].武汉大学学报(信息科学版),2008,33(12):1237-1241. |
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| 作者姓名： | 马亚明 徐杨 张江水 |
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| 作者单位： | 信息工程大学测绘学院，63870部队，测绘信息中心 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 在分析各种常用索引的基础上,依据各自的适用范围,提出了对点对象建立格网索引,对线、面对象建立改进四叉树索引的组合优化策略。设计的改进四叉树索引避免了传统四叉树的重复索引,提高了数据访问的效率。
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| 关 键 词： | 改进的四叉树索引 增量空间索引 细节分层模型 多尺度表达 一体化模型 |
Integrative Model of Spatial Index and Multi-scale Representation |
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| MA Yaming,XU Yang,ZHANG Jiangshui.Integrative Model of Spatial Index and Multi-scale Representation[J].Geomatics and Information Science of Wuhan University,2008,33(12):1237-1241. |
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| Authors: | MA Yaming XU Yang ZHANG Jiangshui |
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| Abstract: | By building incremental spatial index in every display level,spatial index with multi-scale representation based on the graded display is combined;and the integration realizes multi-scale representation and extremely accelerates the accessing of spatial data at the same time.On the basis of the synthetical analysis of various types of indices' characteristics and their respective fitting range,a combined optimized strategy is put forward,which builds grid index for point objects,and builds optimized quad-tree index for line and area objects.The optimized quad-tree index designed by the authors avoids indexing features repeatedly and enhances the data access speed greatly. |
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| Keywords: | optimized quad-tree index incremental spatial index LOD multi-scale representation integrative model |
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