| Technology and Methodology |
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Coastline extraction using remote sensing based on coastal type and tidal correction |
| ZHANG Xukai1,2, ZHANG Xia1, YANG Banghui1, ZHUANG Zhi1,2, SHANG Kun1,2 |
1. Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 100101, China;
2. University of Chinese Academy of Sciences, Beijing 100039, China |
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Abstract The accuracy of coastline extraction can't be guaranteed by applying a single algorithm,because different types of coasts have different characteristics. The existing researches are mostly focused on the extraction of instantaneous waterline,with the lacking of tidal correction and verification of accuracy. In this paper,the authors presented a method combining coastline extraction with coastal type and tidal correction. MNF rotation,MNDWI,morphology and edge detection were applied to SPOT4 data acquired in Qinhuangdao coastal zone to extract instantaneous waterline. Besides,the coastline was extracted accurately by integrating tidal data to calculate the slope of shoal. Moreover,the verification of the accuracy of coastline extraction was achieved by the GPS data obtained in the same period. The results show that the precision of coastline extraction by the method proposed in this paper is high.
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| Keywords
ecological environment
evaluation index
analytic hierarchy process(AHP)
fuzzy mathematics
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Issue Date: 21 October 2013
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2013,
Vol. 25
