| Object-oriented Urban Dynamic Monitoring——A Case Study of Haidian District of Beijing |
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| 作者单位： | 1. Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; 2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China, 3. Key Laboratory of Environmental Change and Natural Disaster, Ministry of Education of China, Beijing Normal University, Beijing 100875, China; 4. College of Resources Science ＆ Technology, Beijing Normal University, Beijing 100875, China |
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| 基金项目： | Under the auspices of the National High Technology Research，Development Program of China(No.2003AA132020) |
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| 摘 要： | It is crucial to conduct the land use/cover research to obtain the global change information.Urban area is one of the most sensitive areas in land use/cover change.Therefore land use/cover change in urban areas is very im-portant in global change.It is vital to incorporate the information of urban land use/cover change into the process of decision-making about urban area development.In this paper,a new urban change detection approach,urban dynamic monitoring based on objects,is introduced.This approach includes four steps:1)producing multi-scale objects from multi-temporal remotely sensed images with spectrum,texture and context information;2)extracting possible changed objects adopting object-oriented classification;3)obtaining shared objects as the basic units for urban change detection;4)determining the threshold to segment the changed objects from the possible changed objects using Otsu method.In this paper,the object-based approach was applied to detecting the urban expansion in Haidian District,Beijing,China with two Landsat Thematic Mapper(TM)data in 1997 and 2004.The results indicated that the overall accuracy was about 84.83%,and Kappa about 0.785.Compared with other conventional approaches,the object-based approach was advantageous in reducing the error accumulation of image classification of each datum and in independence to the radiometric correction and image registration accuracy.
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| 关 键 词： | 北京 城市动态监测 目标导向 遥感系统 |
| 文章编号： | 10.1007/s00769-007-0236-0 |
| 修稿时间： | 2006-09-20 |
Object-oriented urban dynamic monitoring — A case study of Haidian District of Beijing |
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| An Kai,Zhang Jinshui,Xiao Yu. Object-oriented urban dynamic monitoring — A case study of Haidian District of Beijing[J]. Chinese Geographical Science, 2007, 17(3): 236-242. DOI: 10.1007/s11769-007-0236-1 |
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| Authors: | An Kai Zhang Jinshui Xiao Yu |
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| Affiliation: | (1) Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China;(2) Graduate University of Chinese Academy of Sciences, Beijing, 100049, China;(3) Key Laboratory of Environmental Change and Natural Disaster, Ministry of Education of China, Beijing Normal University, Beijing, 100875, China;(4) College of Resources Science & Technology, Beijing Normal University, Beijing, 100875, China |
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| Abstract: | It is crucial to conduct the land use/cover research to obtain the global change information.Urban area is one of the most sensitive areas in land use/cover change.Therefore land use/cover change in urban areas is very im-portant in global change.It is vital to incorporate the information of urban land use/cover change into the process of decision-making about urban area development.In this paper,a new urban change detection approach,urban dynamic monitoring based on objects,is introduced.This approach includes four steps:1)producing multi-scale objects from multi-temporal remotely sensed images with spectrum,texture and context information;2)extracting possible changed objects adopting object-oriented classification;3)obtaining shared objects as the basic units for urban change detection;4)determining the threshold to segment the changed objects from the possible changed objects using Otsu method.In this paper,the object-based approach was applied to detecting the urban expansion in Haidian District,Beijing,China with two Landsat Thematic Mapper(TM)data in 1997 and 2004.The results indicated that the overall accuracy was about 84.83%,and Kappa about 0.785.Compared with other conventional approaches,the object-based approach was advantageous in reducing the error accumulation of image classification of each datum and in independence to the radiometric correction and image registration accuracy. |
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| Keywords: | urban change detection object-oriented method remote sensing land use/cover Otsu method |
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