约束性Delaunay三角网下线状要素形态描述研究  

Description of linear features under restricted Delaunay triangulation

作　　者：罗广祥[1] 郝起礼[1] 赵彩云[1] 王俊锋[1] 张转[1] 祝国瑞[2] 

机构地区：[1]长安大学地球科学与国土资源学院,西安710054 [2]武汉大学资源环境科学学院,武汉430079

出　　处：《测绘科学》2007年第5期161-162,共2页Science of Surveying and Mapping

基　　金：国土资源部农用地分等定级与估价研究(2004889)

摘　　要：以Delaunay三角网为基础,本文形成了用于分析线状要素形态结构的一种约束性三角网,在该三角网中定义了叶、杆、叶叉、间叉、主叉、毛细根、叶枝、间枝、主枝等一系列组件,规定三角单元在内邻接下才具有连通关系,建立了三角单元的树型数据模型,该模型可识别基本弯曲、各层次的复合弯曲,并能体现弯曲的套和关系及复合层次,最后对弯曲形态进行了定义与量化描述。理论分析与实验表明,所提模型与方法逻辑严密,有助于对在GIS平台下线状要素形态分析、自动制图综合及相关问题的探讨。Based on Delaunay triangulation of linear features,the paper formed a kind of restricted triangulation,defined a set of components in the structure,and constructed a tree-form data model.The model could identify the bents of linear features.Moreover,it could express combinational relation of bents.At last,the paper described the shapes of bents quantitively.The analysis and experiments showed that the model and the method were logically correct. They had a basic significance for liner features morphological analysis and automatic cartographic generalization under GIS.

关 键 词：地理信息系统 线状要素 地图制图综合 DELAUNAY三角网 

分 类 号：P28[天文地球—地图制图学与地理信息工程]