基于C#.NET和开放数据的大比例尺高精度数字高程模型提取研究  

Study of the DEM Extraction of Large Scale and High Precision Base on C#.NET and Open Data

作　　者：谢小魁[1] 陈青海 周清[1] 张杨珠[1] 

机构地区：[1]湖南农业大学资源环境学院,湖南长沙410128 [2]杭州经纬信息技术有限公司,浙江杭州311121

出　　处：《测绘与空间地理信息》2016年第9期13-15,共3页Geomatics & Spatial Information Technology

基　　金：湖南农业大学青年科学基金资助项目(12QN26);湖南农业大学东方科技学院教学改革研究项目(50)资助

摘　　要：数字高程模型是对地球表面地形地貌的一种离散的数字表达,在测绘地理信息和工程规划设计中有着广泛的应用。传统利用野外实测建立大比例尺的方法存在成本高、效率低等缺点。本研究利用C#.NET,基于开放的GOOGLE EARTH,开发了获取采样点高程的程序,进而利用Arc GIS建立了等高距为1 m的等高线,制作了分层设色数字高程模型,对该地区的规划设计,提供了数据支撑。实践表明:此种方法获取的数字高程模型精度较高,可以满足大比例尺等高距1 m的数字高程模型的建设需求。Digital elevation model is the l is a kind of discrete digital representation of the earth’s surface topography which has been widely used in surveying,mapping and geographic information and engineering planning and design.The traditional method of field measurement has the disadvantages of high cost and low efficiency.Based on open GOOGLE EARTH,C#.NET was used to development a software to extract the elevation of sampling point,then contour map was built with contour interval of 1m using Arc GIS,and finally a layered digital elevation model was produced.All of those provided data support for the planning and design in the study area.This study showed that the method of obtaining digital elevation models by writing a program based on open data has the advantages of high efficiency,high speed,high precision,which meet the requirement of large-scale digital elevation model construction with contour interval of 1 m.

关 键 词：数字高程模型 地理信息系统二次开发 开放数据 

分 类 号：P208[天文地球—地图制图学与地理信息工程]