收稿日期: 2013-03-29
修回日期: 2013-05-17
网络出版日期: 2014-01-15
基金资助
国家“863”计划项目（2012AA12A401）和国家重大科技专题（30-Y20A02-9003-12/13）资助
An efficient Union algorithm for large vector data
Received date: 2013-03-29
Revised date: 2013-05-17
Online published: 2014-01-15
王庆刚 , 杨崇俊 , 田生军 , 王锋 . 一种高效的大矢量数据Union算法[J]. 中国科学院大学学报, 2014 , 31(1) : 92 -97 . DOI: 10.7523/j.issn.2095-6134.2014.01.014
We designed an efficient union algorithm for large vector data. Firstly, we studied the union function between two or more layers, analyzed characteristics of attribute data and geometry data, and designed union algorithms for attribute data and geometry data, respectively. Secondly, we built a quad-tree index for the features of input layers. Finally, we used multithread to run the efficient union algorithm. A performance test was executed using three different vector data layers. The results show that the performance of the union function based on this algorithm is more efficient than the one in ESRI's ArcGIS10.0.
Key words： large vector data; quad-tree index; Union algorithm; multithread
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