STUDY ON KARST INFORMATION IDENTIFICATION OF QIANDONGNAN PREFECTURE BASED ON RS AND GIS TECHNOLOGY
Karst area is a pure natural resource base,at the same time,due to the special geological environment; there are droughts and floods alternating with frequent karst collapse,rocky desertification and other resource and environment problems,which seriously restrict the sustainable economic and social development in karst areas.Therefore,this paper identifies and studies the karst,and clarifies the distribution of karst.Provide basic data for the rational development of resources in the karst region and the governance of desertification.Due to the uniqueness of the karst landscape,it cant be directly recognized and extracted by computer in remote sensing images.Therefore,this paper uses the idea of RS+DEM to solve the above problems.this article is based on Landsat-5 TM imagery in 2010 and DEM data,proposes the methods to identify karst information research what is use of slope vector diagram,vegetation distribution map,distribution map of karst rocky desertification and other auxiliary data in combination with the signs for human-computer interaction interpretation,identification and extraction of peak forest,peaks cluster and isolated peaks,and further extraction of karst depression.Experiments show that this method achieves the RS+DEM mode through the reasonable combination of remote sensing images and DEM data.It not only effectively extracts karst areas covered with vegetation,but also quickly and accurately locks down the karst area and greatly improves the efficiency and precision of visual interpretation.The accurate interpretation rate of karst information in study area in this paper is 86.73%.
Karst Landsat-5 TM Image RS+DEM Slope Karst Rocky Desertification
Mingxing Yao Guoqing Zhou Wei Wang Zhiliang Wu Yu Huang Xiaomei Huang
Guangxi Key Laboratory for Spatial Information and Geomatics Engineering,Guilin University of Techno Guangxi Key Laboratory for Spatial Information and Geomatics Engineering,Guilin University of Techno
国际会议
北京
英文
2121-2125
2018-05-07（万方平台首次上网日期，不代表论文的发表时间）