| Technology Application |
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Shoreline Extraction and Change Analysis of the Jiuduansha Islands with the Support of Remote Sensing and GIS Technologies |
| FENG Yong-jiu, LIU Dan, HAN Zhen |
| College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China |
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Abstract With the support of remote sensing and GIS technologies,the shoreline information of the Jiuduansha Wetland Nature Reserve in Shanghai obtained in 2001,2005 and 2008 was interpreted respectively through an ArcInfo embedded software,shorelineExtractor,which integrates unsupervised classifiers,map generalization,discrete surface features removal and shoreline tracking. The extracted shorelines were re-sampled at 30,90,150,210,and 270 m respectively to compute the fractal dimensions. A consequent analysis of the shoreline lengths,shoal areas and key positions experiencing growth was conducted in detail. The results demonstrate that there are remarkable differences between the positions of silt growth in three shoals of the Jiuduansha Islands,i.e. upper,middle and lower shoals. The silt growth is dramatically fast in northern upper shoal,northeastern and southwestern middle shoal,and northeastern and southwestern lower shoal. The growths of shoreline length and shore area have the same tendency,indicating a fast growth in upper shoal,a moderate growth in lower shoal and a slow growth in middle shoal. In addition,the fractal property of the Jiuduansha Island is evident, with high values of goodness-of-fit. The fractal dimension of the whole Jiuduansha Island was growing from 2001 to 2008, and the fractal dimensions of upper and middle shoals are less than the dimension of the whole Jiuduansha,whereas the fractal dimension of lower shoal is larger than that of the whole Jiuduansha.
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| Keywords
Power planning
GIS
Planning database
Planning research
Planning management
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Issue Date: 07 March 2012
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2012,
Vol. 24
