| 基于建立3DGIS的八叉树压缩算法的研究与改进 |
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| 引用本文： | 胡小红,刘奕伶. 基于建立3DGIS的八叉树压缩算法的研究与改进[J]. 适用技术之窗, 2008, 0(7): 93-95 |
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| 作者姓名： | 胡小红 刘奕伶 |
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| 作者单位： | 抚州市委党校,江西抚州344000 |
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| 摘 要： | 在3DGIS领域中，空间数据结构占有突出的地位，它直接关系到GIS的功能和效率。为了对3DGIS海量数据进行有效地存储和管理，本文讨论了3DGIS栅格数据结构线性八叉树编码压缩技术，并在原来压缩技术基础上，对其压缩过程进行了改进，同时给出了改进后的压缩和解压缩算法。通过对改进前后算法的比较，发现改进后的算法在压缩时间和数据压缩率上都有显著提高。
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| 关 键 词： | 3DGIS 八叉树 数据压缩 压缩算法 |
Research and Improvement of the Compression Algorithm Based on Octree for Modeling Three Dimensional GIS |
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| Hu Xiaohong Liu Yiling. Research and Improvement of the Compression Algorithm Based on Octree for Modeling Three Dimensional GIS[J]. Science & Technology Plaza, 2008, 0(7): 93-95 |
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| Authors: | Hu Xiaohong Liu Yiling |
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| Affiliation: | Hu Xiaohong Liu Yiling(School of Fuzhou Communist Party Committee, Jiangxi Fuzhou 344000) |
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| Abstract: | In the 3DGIS realm, the space data structure occupies an outstanding position and it directly relates to a GIS function and efficiency.For being to the amount of 3DGIS data availably saving and managing , this text discussed the data structure of the 3DGIS grid linear Octree code comprcssing technique, and in originally compressing technique foundation, improving process of comprcssion, in the meantime give out being improved compression and against compression algorithm.Through compressing, found the improvement of way in compressing time and compressing rate. |
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| Keywords: | 3DGIS Octree Compressed Data Compressed Algorithm |
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