摘要
数字高程模型DEM(Digital Elevation Model)在地理信息系统(GIS)中有着广泛的应用。它是生成三维立体地貌,计算地面距离、坡度、土方、面表积等的基础数据模型,也是巡航飞行器地形相关匹配的基础数据。本文首先提出了一种由离散无序数据快速生成DEM的方法,着重讨论了数据分块技术、分块搜索技术。同时还给出了一种启发式自适应分块方法。最后报告了笔者用该方法生成DEM的实验结果。
Digital Elevation Model (DEM) has a wide variety of applications in GIS and other fields. It is the basic model for various GIS operations, and the key data for terrain correlation matching of cruise missiles as well.This paper presents a fast algorithm for generating DEM with disordered height data.The techniques of data blocking and data searching are discussed and a heuristicbased adaptive approach of data blocking is recommended. Experimental results by means of the algorithm are shown.
出处
《计算机应用与软件》
CSCD
1998年第4期28-33,66,共7页
Computer Applications and Software
关键词
数字高程模型
数据分块
搜索
算法
GIS
Digital elevation model, Voronoi diagram,gridize,data blocking,searching.
