摘要
为研究归一化植被指数(NDVI)和比值植被指数(RVI)的特点,选取德阳市旌阳区作为实验区,以2007年、2014年和2018年的Landsat影像为数据源,反演得到实验区NDVI和RVI的分布状况。结果表明,二者均能较客观地反映地表植被覆盖的整体情况;通过剖面分析发现,当NDVI值在0.5左右时,RVI反映的地表植被覆盖状况变化非常显著,当NDVI值在0.2左右时,部分RVI反映的地表植被覆盖状况与实际存在一定的差异,个别低植被覆盖区域RVI值在1附近。
To study the characteristics of normalized difference vegetation index(NDVI)and ratio vegetation index(RVI),taking Jingyang District of Deyang City as the research object,taking Landsat images in 2007,2014 and 2018 as data sources,we inverted the distribution of NDVI and RVI in the experimental area.The result showed that both of them could objectively reflect the overall situation of the surface vegetation coverage.Through profile analysis,we found that when the NDVI value was about 0.5,the surface vegetation coverage reflected by RVI was very significant,but when the NDVI value was about 0.2,there was some certain error in the surface vegetation coverage reflected by RVI,and even some the RVI value were 1 in some low vegetation coverage areas.
出处
《地理空间信息》
2021年第7期75-77,I0006,共4页
Geospatial Information
基金
国家自然科学基金资助项目(41672325)
德阳市2017年第二批应用技术研究与开发资助项目(2017ZZ064)
四川省教育厅自然科学创新团队资助项目(16TD0040)。
作者简介
李海峰,博士(后),教授,主要研究方向为遥感与地理信息系统技术应用。
