Object-based image analysis change detection and temporal-spatial variation on construction land of Wuhan Metropolitan Area from 1990 to 2015
PEI Yanyan1,2,3， HUANG Jinliang1,3， WANG Lihui1,3， LU Jun1,2,3
1.Institute of Geodesy and Geophysics， Chinese Academy of Sciences， Wuhan 430077；2.University of Chinese Academy of Sciences， Beijing 100049；3.Key Laboratory for Environment and Disaster Monitoring and Evaluation of Hubei Province， Wuhan 430077
Abstract：Wuhan Metropolitan Area is an important point of the strategy of the rise of Central China and one of the earliest comprehensive reform testing areas for national resource-saving and environment-friendly society building. The study of the rule of construction land sprawl in Wuhan Metropolitan Area is of great significance for regional urban planning and policy implementation on national and regional economic development. With the Landsat TM/OLI Remote Sensing Images in 1990-2015 as data source， construction land information is extracted by object-based image analysis method. The temporal-spatial differentiation characteristics on construction land are analyzed by using expansion area， expansion speed index， expansion intensity index and compactness index. The results are as follows. 1) The useage of multiple index and automatically classification threshold by Salford Predictive Modeler is able to better extract the construction land information， with the overall accuracy of 94.3%. 2) The construction land expansion area in Wuhan Metropolitan Area has been gradually increased from 1990 to 2015， with the total expansion area of 251 893.96 hm2. The expansion of the earlier 10 years (1990－2000) is slow， and the expansion area， speed and intensity of the later 15 years (2000－2015) are 6.98， 4.08 and 4.65 times of that of the earlier 10 years， respectively. 3) The construction land sprawl area in every city showed an ascendant trend from 1990 to 2015. From north to south and west to east， the space form in every city changed to be more and more compact.
裴艳艳,黄进良,王立辉,陆 俊,. 基于OBIA的武汉城市圈1990年～2015年建设用地变化检测及时空特征分析[J]. 华中师范大学学报(自然科学版), 2017, 51(5): 671-679.
PEI Yanyan,HUANG Jinliang,WANG Lihui,LU Jun,. Object-based image analysis change detection and temporal-spatial variation on construction land of Wuhan Metropolitan Area from 1990 to 2015. journal1, 2017, 51(5): 671-679.
2017, Vol. 51 
