摘要
以四川省泸定县为分析研究区域,综合运用遥感图像处理技术与GIS空间分析技术,用ETM+遥感影像获取归一化植被指数(NDVI)信息并反演植被覆盖度,用地形图等高线生成数字高程模型(DEM)并提取地形因子。借助叠合分析法,讨论植被覆盖度与海拔高度、坡度、坡度变率、坡向、坡向变率5种地形因子的空间关系,得到泸定县关于地形因子的各等级植被空间分布特征。分析对地植物学中高山峡谷地区植被的地形格局分布规律研究与生态环境的评价与改良都具有重要的参考价值。
Luding County,Sichuan Province is taken as a study area.The remote sensing image processing technology and the GIS spatial analysis techniques are applied comprehensively.The normalized difference vegetation index(NDVI) is obtained from the ETM+ images,and then convert into vegetation coverage.The topographic factors are extracted from the digital elevation model(DEM) which is generated by contour lines of topographic map.With the help of overlay analysis,the spatial relationships between vegetation coverag...
出处
《测绘工程》
CSCD
2010年第5期49-52,56,共5页
Engineering of Surveying and Mapping
基金
国家自然科学基金资助项目(40972225)
四川省教育厅自然科学重点项目(2006A116)
关键词
泸定县
植被覆盖度
地形因子
NDVI
DEM
叠合分析
空间分布
Luding County
vegetation coverage
topographic factors
NDVI
DEM
overlay analysis
spatial distribution differentiation
