A method of accurate location for island away from mainland by remote sensing

	A method of accurate location for island away from mainland by remote sensing
	Liu, Shanwei ; Zhang, Jie ; Ma, Yi
通讯作者	Liu, S
会议主办者	International Society of Photogrammetry; and Remote Sensing (ISPRS); International Cartographic Association (ICA); International Association of Geodesy (IAG); International Society for Digital Earth (ISDE)
	2009
会议名称	2nd International Conference on Earth Observation for Global Changes
会议日期	2009-5-29
会议地点	Chengdu, China
ISSN号	0277786X
ISBN号	9780819477743
产权排序	Institute of Yantai Coastal Zone and Sustainable Development, Chinese Academy of Sciences;Southern China Sea Institute of Oceanography, Chinese Academy of Sciences; Graduate School, Chinese Academy of Sciences;First Institute of Oceanography, State Oceanic Administration
关键词	Digital Instruments Geomorphology Image Coding Metadata Observatories Remote Sensing Rock Mechanics Surveying
摘要	The accuracy of geographic location is important for island investigations by remote sensing. However, many islands are far away from land, and it is impossible to obtain accurate ground control points (GCPs) that could be used for geometric correction. We propose a geometric correction method without using GCP to orientate islands accurately. The test data are four SPOT-5 images that were obtained from the same orbit and at the same time; one of these images does not include islands but allows one or more GCPs to be acquired. Firstly, we initially correct the image with GCPs by using a physical model, metadata, and a digital elevation model derived from SRTM data, but the accuracy is slightly better than 50 m. We calculate the offset between the corrected image and its GCPs and use this offset to correct the digital elevation model to make its coordinates to agree with that from the metadata. Then, we further correct the image by using a physical model, metadata and the corrected digital elevation model to suppress the hypsographical distortion. Finally, We use an affine transformation model to calculate the distortion parameters from the corrected image by using its GCPs, and further used these parameters to correct the other three images without GCPs. Our experiment is quite encouraging as when some islands are 159 km away from land we still achieve a location accuracy better than 5 m.
收录类别	EI
语种	英语
文献类型	会议论文
条目标识符	http://ir.yic.ac.cn/handle/133337/3131
专题	中国科学院烟台海岸带研究所知识产出
推荐引用方式 GB/T 7714	Liu, Shanwei,Zhang, Jie,Ma, Yi. A method of accurate location for island away from mainland by remote sensing[C]. Bellingham WA:SPIE,2009.

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