基于自然法则的地表拓扑简化  

Topological Simplification Based on Nature Principle for Terrain Surface

作　　者：王洪斌[1] 朱新颖 张春亢[1] 

机构地区：[1]中国矿业大学(北京)地球科学与测绘工程学院,北京100083 [2]Esri(中国)信息技术有限公司,北京100007

出　　处：《测绘科学技术学报》2013年第6期572-576,共5页Journal of Geomatics Science and Technology

摘　　要：选择合适的标准对临界点进行评价和取舍是拓扑简化首先必须解决的关键问题。为克服已被认识到的现有临界点权重标准的片面性,本文依据自然法则,从理论上提出了一种新的关于地形表面临界点的评价标准和计算方法,设计了相应的拓扑简化算法。最后,进行了实验验证和分析。结果表明:基于自然法则对地表临界点进行评价的标准客观,计算简单,相应的拓扑简化算法正确、可行。How to chose an appropriate evaluation criterion for critical points is the first issue to be resolved in to- pological simplification. In this paper, a new evaluation measure based on nature principle was presented for criti- cal points on terrain surface, which can overcome the known shortcoming of the existing criterion. Moreover, the corresponding algorithm for topological simplification was designed. Finally, experiment and analysis were conduc- ted. The result indicated that the evaluation criterion based on nature principle was objective and of convenient cal- culation, and that the algorithm was correct and feasible.

关 键 词：临界点 权重 自然法则 拓扑简化 Morse复形 

分 类 号：P208[天文地球—地图制图学与地理信息工程]