Study on Method of Geohazard Change Detection Based on Integrating Remote Sensing and GIS

35th International Symposium on Remote Sensing of Environment

地球科学;生态环境科学

Zhao, Zhenzhen^1,2 ; Yan, Qin^1 ; Liu, Zhengjun^1 ; Luo, Chengfeng^1

Institute of Photogrammetry and Remote Sensing, Chinese Academy of Surveying and Mapping, Beijing, 100830, China^1

School of Information Science and Engineering, Shandong Agricultural University, Tai'an 271018, China^2

关键词: Basic principles;    Change detection;    Determination algorithm;    Literature reviews;    Pixel information;    Remote sensing and GIS;    Remote sensing images;    Remote sensing information;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/17/1/012094/pdf
DOI  :  10.1088/1755-1315/17/1/012094

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Following a comprehensive literature review, this paper looks at analysis of geohazard using remote sensing information. This paper compares the basic types and methods of change detection, explores the basic principle of common methods and makes an respective analysis of the characteristics and shortcomings of the commonly used methods in the application of geohazard. Using the earthquake in JieGu as a case study, this paper proposes a geohazard change detection method integrating RS and GIS. When detecting the pre-earthquake and post-earthquake remote sensing images at different phases, it is crucial to set an appropriate threshold. The method adopts a self-adapting determination algorithm for threshold. We select a training region which is obtained after pixel information comparison and set a threshold value. The threshold value separates the changed pixel maximum. Then we apply the threshold value to the entire image, which could also make change detection accuracy maximum. Finally, we output the result to the GIS system to make change analysis. The experimental results show that this method of geohazard change detection based on integrating remote sensing and GIS information has higher accuracy with obvious advantages compared with the traditional methods.