THE APPLICATION OF DEM TO SLOPING FARMLAND INVESTIGATION
GUO Peng1, SUN Yan-ling1, BAI Jie1, LIU Hong-bin1,2, WU Wei1
1. Laboratory of Digital Agriculture and Bioinformatics, Southwest Agriculture University, Chongqing 400716, China;
2. Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550005, China
The investigation of sloping farmland, especially that with slope steeper than 25°, is an important task in soil resource investigation and evaluation during the development of western China. DEMis a digital elevation model produced by computer system. It can make topographic analysis, simulate geomorphologic shape, and display geomorphologic characteristics and topographic position directly. With the 1:10000 scale relief map as an example and under the support of Arc/Info software of GIS, the authors formed DEM through digitizing the topographic contour map. The slope map computed and derived by the DEM was taken as the basic material and, with the integration of the landuse map and related material and the application of GISto comprehensive analysis, the data of sloping farmland were obtained. In the whole process, computer processing occupies the dominant position and human interference is suppressed. Therefore, the efficiency is high.
收稿日期: 2002-12-10
出版日期: 2011-08-02
基金资助:
重庆市科委攻关项目(6217);重庆市教委科技项目(011802)。
作者简介: 郭鹏(1978-),男,辽宁本溪人,硕士研究生,从事土地资源信息管理与3S研究.
引用本文:
郭鹏, 孙艳玲, 白洁, 刘洪斌, 武伟. 数字高程模型在坡耕地调查中的应用[J]. 国土资源遥感, 2003, 15(4): 59-62.
GUO Peng, SUN Yan-ling, BAI Jie, LIU Hong-bin, WU Wei. THE APPLICATION OF DEM TO SLOPING FARMLAND INVESTIGATION. REMOTE SENSING FOR LAND & RESOURCES, 2003, 15(4): 59-62.