基于Landsat的六盘水市地表温度反演分析

Inversion analysis of surface temperature of Liupanshui City based on Landsat

将六盘水市作为研究区,对该城市的地表温度进行探究分析。以2015年该城市的Landsat8卫星影像作为主要数据源,采用ENVI、ArcGIS等软件对六盘水市的影像数据进行归一化处理,可以得到六盘水市城市地表温度等级分布图、植被覆盖度等级分布图、归一化建筑指数等级图、归一化水体指数和地表比辐射率等级分布图。并对得到的结果进行对比分析可以得到如下结果:地表温度与植被覆盖度呈负相关;归一化建筑指数、地表比辐射率与地表温度呈正相关;归一化水体指数对地表温度的影响随着气温的升高呈负相关,反之亦然。

Liupanshui City was used as the target area to explore the city's surface temperature.Taking the Landsat8 satellite images of the city in 2015 as the main data source,using ENVI,ArcGIS and other software to normalize the image data of Liupanshui City,we obtained the surface temperature distribution map,vegetation coverage distribution map,normalized construction index map,normalized water index map,and surface emissivity distribution map of Liupanshui City.Comparing the obtained results,we obtained the following results: the surface temperature was negatively correlated with the vegetation coverage;the normalized construction index and the surface emissivity were positively correlated with the surface temperature;the effect of the normalized water index on the surface temperature was negatively correlated with the increase of temperature,and vice versa.