摘要
通过对杭州市区ETM+遥感影像数据的处理,提取该区域地表亮温和NDVI数据,并结合实测温度对亮温数据的可靠性进行了验证。在亮温图的基础上,利用温度分级掩膜运算得出不同温度像元NDVI信息,同时对亮温数据进行了标准化处理,从而得到热岛强度和NDVI关系的散点图,然后利用监督分类、相关性矩阵及统计分析等方法,对关系数据进行了修改、验证及拟合,得出杭州市区热岛强度和NDVI之间的定量关系模型,修正判定系数达到0.88,较好地反映了该区域热岛效应和植被覆盖指数的关系,为杭州市城市规划、绿地规划等提供了较为可靠的理论依据。
The brightness temperature data, whose reliability is verified by the observed air temperature, and NDVI data of Hangzhou urban city was acquired from ETM＋ image. Then the scatter graph of Urban Heat Island Index-NDVI was developed by using the temperature-degraded mask form the brightness temperature map and normalization of brightness temperature. The quantitative relation model, which has a high adjusted R2 of 0.88, was simulated by using super-classification, correlation matrix and statistics tool based on the scatter graph, and can be used as relatively credible theory, in the city planning and urban green space system planning.
出处
《科技通报》
2006年第5期708-713,共6页
Bulletin of Science and Technology
基金
国家重点基础研究(973)资助项目(2002CB410807)
关键词
遥感
地表亮温
热岛强度指数
NDVI
杭州
remote sense
brightness temperature
Urban Heat Island Index
NDVI
Hangzhou
