树状河系主流的自动推理

¹武汉大学资源与环境科学学院,武汉市珞喻路129号430079;²武汉大学地理信息系统教育部重点实验室,武汉市珞喻路129号,430079;³钦州学院环境与经济学系,钦州市南珠西大街,535000

基金项目: 国家自然科学基金资助项目(40571133)

详细信息

Automatic Reasoning on Main Streams of Tree River Networks

¹School of Resources and Environment Science,Wuhan University,129 Luoyu Road,Wuhan 430079,China;²Key Laboratory of Geographic Information System of Ministry of Education,Wuhan University,129 Luoyu Road,Wuhan 430079,China;³Department of Environment and Economics,Qinzhou College,West Nanzhu Street,Qinzhou 535000,China

Funds: 国家自然科学基金资助项目(40571133)

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。
- 河系 /
- 空间特征 /
- 空间推理 /
- 流向 /
- 主流
Abstract: 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.
- river networks /
- spatial characteristics /
- spatial reasoning /
- flow direction /
- main stream