基于数字高程模型制作山区坡度分级栅格数据  

Mapping Slope Graded Map of Mountainous Area Based on Digital Elevation Model

作　　者：王永峰[1] 徐莹[1] 王涛[1] 

机构地区：[1]天津市测绘院,天津300381

出　　处：《测绘与空间地理信息》2014年第12期36-38,共3页Geomatics & Spatial Information Technology

基　　金：武汉大学水资源与水电工程科学国家重点实验室项目(2011B083)资助

摘　　要：山区的坡度分析可为规划建设和土地利用提供所需的地理底图,对此较为准确、有效的方法是利用高精度的数字高程模型DEM进行坡度计算及分析,数字高程模型相比于其他数据更适用于数字地形分析。本文阐述了基于1∶50 000比例尺的数字高程模型并利用Arc GIS软件进行山区坡度的计算及坡度分级栅格数据的制作,将结果与高分辨率正射影像进行叠加以初步检查结果的正确性,最后将坡度在25°以上的区域提取出来并以矢量文件形式输出。Geographical base map is provided to assist in planning and land use of mountainous area through slope analysis. Accurate and efficient method of slope analysis is based on high precision digital elevation model, DEM is better than other general spatial data to solve digital terrain analysis. This paper presents the flow that using ArcG1S software to compute mountainous area slope value and produce slope graded raster data based on 1 ： 5 000 scale DEM. The accuracy of slope graded map is verified by high resolution digital ortho map. All the interested spot whose slope value is less than 25 degree is completely extracted and exported in the manner of vector file.

关 键 词：坡度分析 数字高程模型 规划建设 25° 

分 类 号：P208[天文地球—地图制图学与地理信息工程]