基于DEM的地形高度与土地利用空间格局的关系——以韶关市大塘镇为例

Based on the Relationship between the Height of the Terrain and Land Use Spatial Pattern of DEM:A Case Study of Datang Town of Shaoguan Municipality

地形高度是影响土地利用空间格局分布的影响因素之一,本文以韶关市大塘镇为研究区,基于研究区的DEM和土地利用现状图,利用GIS提取研究区的地形高程及土地利用信息,并将各地形高度与土地利用图进行叠加分析,研究地形高度与土地利用空间格局的关系。研究结果表明:1随着高程增加,各土地利用类型的面积及占土地总面积的比例都呈下降趋势;2土地利用类型占该该类土地利用的比重均在第一级高程或第二级高程达到最大值,随高程增加,分布比重逐渐下降;3低高程区域土地利用较为破碎,高高程区域土地利用较为集中,以林地为主。

One of the factors affecting the terrain height spatial pattern of land use distribution to Shaoguan City Town as the study area,based on the use of information extracted terrain elevation and land in the study area DEM and land use map of the study area,the use of GIS,and around the shape height and land use map overlay analysis,studies the relationship between the height of the terrain and land use spatial pattern. The results showed that： 1 As elevation increases,the area of each land use type and proportion of the total land area tended to decrease; 2 proportion of land use types are the kind of land use in the first or second grade level elevation elevation reaches the maximum,with the elevation increases,the proportion of distribution decreased; 3 regional land use relatively low elevation crushing,high-elevation regional land use is more concentrated,with woodland.