耦合Strahler和Gravelius方法的线状水系自动分级算法  

Automatic Classification Algorithm of Linear River Network Coupling Strahler and Gravelius

作　　者：钟世能 蔡忠亮[1] 唐泽瑞 ZHONG Shineng;CAI Zhongliang;TANG Zerui(School of Resource and Environmental Sciences,Wuhan University,Wuhan 430079,China)

机构地区：[1]武汉大学资源与环境科学学院,湖北武汉430079

出　　处：《测绘地理信息》2022年第S01期194-197,共4页Journal of Geomatics

基　　金：国家重点研发计划(2017YFB0503500)

摘　　要：水系作为地图制图的重要要素,在地图中正确表达水系要求水系数据具有河流名称、河流等级、河流长度等属性信息。但现有地理空间数据库中的河流数据往往缺少河流等级等属性,在制图表达中水系结构、河流等级等信息一般需要大量的人工判读和构建,费时费力,且容易产生错误结果。本文研究并提出一种耦合Strahler和Gravelius方法的线状水系结构及其等级自动判别算法。首先构建水系层次结构及河段关系;然后采用Strahler方法计算河流深度;再基于Gravelius自动计算河流分级,实现从线状河流基础数据到水系结构及河流等级的自动分级;最后,通过ArcGIS Engine开发实现本文算法。经实验验证本文算法的合理性和有效性,算法简单易操作,具有实用性。River systems is an important element in cartographic.River name,river level and river length and other attributes should be included in the data of river systems to express the river systems in map correctly.However,it is often lack of level attributes in the river data in existing geodatabase.The information such as river structure and river level,requires a lot of manual interpretation and construction in cartographic expression,which is time-consuming and laborious,and prone to produce wrong results.In this paper,we study and put forward a method that coupling STRAHLER and Gravelius to construct linear water system structure and distinguish the river level automatically.Firstly,the hierarchical structure of rivers and the relation between river reaches are established,and then the river depth is calculated by STRAHLER method,and then the river levels are calculated based on Gravelius automatic classification.This study has finished constructing river networks system structure from basic river data and distinguishing the river levels automatically.Finally,the algorithm is developed by ArcGIS Engine,and the rationality and effectiveness of the algorithm are verified by experiments.The algorithm is simple and easy to operate with practicability.

关 键 词：地图制图 线状水系 网状结构 自动分级 

分 类 号：P285[天文地球—地图制图学与地理信息工程]