| 一种基于面积平衡约束的图斑化简算法 |
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| 引用本文： | 李建林,朱德海,宋晓眉,陈亚婷,杨扬.一种基于面积平衡约束的图斑化简算法[J].地理与地理信息科学,2009,25(1). |
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| 作者姓名： | 李建林 朱德海 宋晓眉 陈亚婷 杨扬 |
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| 作者单位： | 1. 中国农业大学信息与电气工程学院,北京,100083;北京市国土资源局信息中心,北京,100013
2. 中国农业大学信息与电气工程学院,北京,100083 |
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| 摘 要： | 保持综合前后各地类土地面积平衡是土地利用数据综合的基本原则.地类图斑是面积统计的最小单元,用常规的线化简算法不但难以保证图斑的地理特性,而且会给面积统计带来不确定性.该文提出一种能够使图斑化简前后面积保持绝对平衡的化简算法,该算法给出了求取图斑群和岛图斑的地理特征点、几何特征点的相关方法,对被特征点分割的综合子弧段运用直线面积平衡和参数曲线面积平衡两种求取平衡线的方式进行化简,基本原理是综合前后弧段切割它们自身的包络矩形面积比相等,且综合后的弧段须落入综合前子弧段的误差缓冲区内.实验表明,该算法不但能保持图斑的形态特征,而且能保持图斑化简前后面积绝对相等.
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| 关 键 词： | 图斑化简 面积平衡 最小包络矩形 贝塞尔曲线 |
A Polygon Simplification Algorithm with Area-Balance Consideration |
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| LI Jian-lin,ZHU De-hai,SONG Xiao-mei,CHEN Ya-ting,YANG Yang.A Polygon Simplification Algorithm with Area-Balance Consideration[J].Geography and Geo-Information Science,2009,25(1). |
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| Authors: | LI Jian-lin ZHU De-hai SONG Xiao-mei CHEN Ya-ting YANG Yang |
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| Institution: | 1.College of Information and Electrical Engineering;China Agriculture University;Beijing 100083;2.Information Center;Beijing Municipal Bureau of Land and Resources;Beijing 100013;China |
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| Abstract: | To keep the area proportion of different kinds of land-use in a stable level is one of the basic principles of land-use data generalization.Polygon is the smallest unit for the area statistics.The conventional line simplification algorithm is not only hard to keep the geographical characteristics,but also brings lots of uncertainties into area statistics.Therefore,a new algorithm which can simplify polygons with the balance of area is proposed in this paper.This algorithm manages to figure out geographical ... |
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| Keywords: | polygon simplification area balance minimum bounding rectangle Bezier curve |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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