基于ArcGIS软件的小比例尺地形图信息提取方法研究

Research on Information Extraction Method of Small Scale Topographic Maps Based on ArcGIS Software

地形图是土地利用、规划管理等应用研究的重要基础,不同用户对电子地形图存在不同需求,本研究基于ArcGIS软件的小比例尺地形图信息提取方法,利用Delaunay直接三角剖分方法建立TIN网,通过TIN内插计算问题将TIN转化至规则格网建立小比例尺地形图,利用加权整体最小二乘方法拟合所建立的地形图曲面,提升所建立小比例尺地形图精度,利用ArcGIS软件提取完成曲面拟合的小比例尺地形图的点状地名、点状居民地、道路、水系等信息,满足不同用户应用所需。

Topographic map is an important source of application research on land use,planning and management.Different users have different needs for electronic topographic maps.Research on the information extraction method of small-scale topographic map based on ArcGIS software,it uses Delaunay direct triangulation method to establish TIN network,uses TIN interpolation calculation to convert TIN to regular grid to establish small-scale topographic maps,and uses weighted global least squares method to fit the surface of the established topographic map.To improve the accuracy of the established small-scale topographic maps,ArcGIS software is used to extract the point-shaped place names,point-shaped residential areas,roads,water systems and other information of the small-scale topographic maps that has completed the surface fitting to meet the needs of different user applications.