摘要
以庄河市1∶1万MapInfo地籍数据库为基础,利用地理信息系统软件MapInfo-VM建立格网DEM模型,并通过DEM计算派生出坡度等值面图,再结合矢量化地籍图和相关资料,应用地理信息系统空间分析功能,自动提取坡耕地数据。整个过程主要由计算机进行处理,人工干预少,效率高。
On the basis of the cadastral database of one to ten thousand scale, Grid-based DEM is established by using Mapinfo-VM. Sloping contours is derived through calculation by DEM. By means of space-analysis of geographic information system,with the cadastral vectorgraphs and correlative data, sloping farmland data are automatically picked up. In the whole process,computer processing occupies the dominant position and human interference is suppressed. Therefore, the efficiency is high.
出处
《国土资源科技管理》
2007年第2期102-105,共4页
Scientific and Technological Management of Land and Resources
关键词
数字高程模型
格网DEM
坡耕地
digital elevation model
grid-based DEM
sloping farmlan
