30m global impervious surface area dynamics and urban expansion pattern observed by Landsat satellites: From 1972 to 2019  

作　　者：Xin HUANG Jiayi LI Jie YANG Zhen ZHANG Dongrui LI Xiaoping LIU 

机构地区：[1]School of Remote Sensing and Information Engineering,Wuhan University,Wuhan 430079,China [2]State Key Laboratory of Information Engineering in Surveying,Mapping and Remote Sensing,Wuhan University,Wuhan 430079,China [3]Guangdong Key Laboratory for Urbanization and Geo-simulation,School of Geography and Planning,Sun Yat-Sen University,Guangzhou 510006,China

出　　处：《Science China Earth Sciences》2021年第11期1922-1933,共12页中国科学（地球科学英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(Grant Nos.42071311,41771360&41971295).

摘　　要：Using more than three million Landsat satellite images,this research developed the first global impervious surface area(GISA)dataset from 1972 to 2019.Based on 120,777 independent and random reference sites from 270 cities all over the world,the omission error,commission error,and F-score of GISA are 5.16%,0.82%,and 0.954,respectively.Compared to the existing global datasets,the merits of GISA include:(1)It provided the global ISA maps before the year of 1985,and showed the longest time span(1972–2019)and the highest accuracy(in terms of a large number of randomly selected and third-party validation sample sets);(2)it presented a new global ISA mapping method including a semi-automatic global sample collection,a locally adaptive classification strategy,and a spatio-temporal post-processing procedure;and(3)it extracted ISA from the whole global land area(not from an urban mask)and hence reduced the underestimation.Moreover,on the basis of GISA,the long time series global urban expansion pattern(GUEP)has been calculated for the first time,and the pattern of continents and representative countries were analyzed.The two new datasets(GISA and GUEP)produced in this study can contribute to further understanding on the human’s utilization and reformation to nature during the past half century,and can be freely download from http://irsip.whu.edu.cn/resources/dataweb.php.

关 键 词：LANDSAT URBAN Google earth engine Impervious area Urban expansion 

分 类 号：P237[天文地球—摄影测量与遥感]