基于TM影像的黄陵县土地利用变化动态监测

以1987年和2002年两期TM影像为信息源,应用计算机自动识别分类与GIS空间分析相结合的方法,提取了黄陵县不同时期的土地利用现状信息及其动态变化。结果表明:研究区森林覆盖率高,林地占区域土地总面积的70%以上;耕地面积较小,占地比例不到7%。1987年至2002年,耕地和草地面积明显减少,园地增加突出,林地、居民点及工矿用地略有增长,其中面积变化最大的是耕地,减少111.13 km2;变化率最大的是园地,达到329.44%。

Study on dynamic monitoring of land use change in Huangling County based on TM remote image

Based on two phases Landsat TM images of 1987 and 2002 as the information sources,and using a classification method that combined computer automatic recognition and GIS spatial analysis,the land use information and dynamic change of Huangling County in different periods was extracted.The result indicated that the area of woodland and grassland with the large area,in the same time,forest with a high coverage and woodland contributes more than 70% of the total land area,and arable land contributes a low proportion,which was less than 7% in the study area.From 1987 to 2002,the area of arable land and grassland reduced obviously,garden plot increased obviously in the meantime.The woodland and residential paints area increased slightly.Among them,the arable land covers the most of the changed area,which reduced by 111.13 km2.The change rate of garden plot is the biggest which achieved 329.44%.