摘要
分析了不同类型河系的空间特征,对非网状河系以180°假设和锐角假设为基础,改进了自动确定河段流向的定量化决策表,当出现流向冲突时,遵守少数服从多数的原则。参考河段的流向、节点处分支河段的累计河段数和累计长度,能自动推理出树状河系的主支流关系。在此基础上,进一步研究了树状河系的编码方法,并用实例验证了所提出的算法。
The spatial characteristics of different types of river networks are analyzed. On the basis of 180° assumption and the acute angle assumption for non-networks rivers, the quantitative decision-making table of automatic determination of flow direction is improved. With the flow directions conflict, the principle of subordination of the minority to the majority is applied. According to the flow directions of channels, accumulated numbers and accumulated lengths of channels on a node, the relations of main streams and branch rivers can be reasoned automatically. On the basis of this analysis, the coding method of tree network rivers are studied. The experimental results show the validation of this algorithm.
出处
《武汉大学学报（信息科学版）》
EI
CSCD
北大核心
2008年第9期978-981,共4页
Geomatics and Information Science of Wuhan University
基金
国家自然科学基金资助项目(40571133)
关键词
河系
空间特征
空间推理
流向
主流
river networks
spatial characteristics
spatial reasoning, flow direction
main stream
