Extraction and Analysis of Mega Cities' Impervious Surface on Pixel-based and Object-oriented Support Vector Machine Classification Technology: A case of Bombay

International Symposium on Earth Observation for One Belt and One Road

地球科学;政治学;社会学;经济学

Yu, S.S.^1,2 ; Sun, Z.C.^2,3 ; Sun, L.^1 ; Wu, M.F.^1,4

Shandong University of Science and Technology, Qingdao, Shandong

266590, China^1

Key Laboratory of Digital Earth Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing

100094, China^2

Hainan Key Laboratory Earth Observation, Sanya, Hainan

572029, China^3

Hunan Normal University, Changsha, Hunan

410006, China^4

关键词: Classification methods;    Land use/land cover;    Object oriented method;    Pixel-based methods;    Post classification;    Remote sensing imagery;    Support vector machine classification;    SVM classification;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/57/1/012042/pdf
DOI  :  10.1088/1755-1315/57/1/012042

来源: IOP

【 摘 要 】

The object of this paper is to study the impervious surface extraction method using remote sensing imagery and monitor the spatiotemporal changing patterns of mega cities. Megacity Bombay was selected as the interesting area. Firstly, the pixel-based and object-oriented support vector machine (SVM) classification methods were used to acquire the land use/land cover (LULC) products of Bombay in 2010. Consequently, the overall accuracy (OA) and overall Kappa (OK) of the pixel-based method were 94.97% and 0.96 with a running time of 78 minutes, the OA and OK of the object-oriented method were 93.72% and 0.94 with a running time of only 17s. Additionally, OA and OK of the object-oriented method after a post-classification were improved up to 95.8% and 0.94. Then, the dynamic impervious surfaces of Bombay in the period 1973-2015 were extracted and the urbanization pattern of Bombay was analysed. Results told that both the two SVM classification methods could accomplish the impervious surface extraction, but the object-oriented method should be a better choice. Urbanization of Bombay experienced a fast extending during the past 42 years, implying a dramatically urban sprawl of mega cities in the developing countries along the One Belt and One Road (OBOR).