A Polyhedral Function Fitting Method of Elevation Anomaly with Terrain Entropy and Clustering

doi:10.13474/j.cnki.11-2246.2018.0356

测绘通报 ›› 2018, Vol. 0 ›› Issue (11): 86-89.doi: 10.13474/j.cnki.11-2246.2018.0356

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A Polyhedral Function Fitting Method of Elevation Anomaly with Terrain Entropy and Clustering

SUN Jialong^1,2,3,4, GUO Shuyan⁵, LONG Bingxin¹, QIN Siyuan¹

1. School of Geomatics and Marine Information, Huaihai Institute of Technology, Lianyungang 222005, China;
2. Key Laboratory of Surveying and Mapping Technology on Island and Reef of SBSM, Qingdao 266590, China;
3. Key Laboratory of Geo-Environmental Monitoring of Coastal Zone of SBSM, Shenzhen 518060, China;
4. Jiangsu Marine Resource Development Research Insititute, Lianyungang 222001, China;
5. Beijing Geodetic Survey Technology Co., Ltd., Beijing 100029, China

Received:2018-02-22 Revised:2018-04-13 Online:2018-11-25 Published:2018-11-29

Abstract

Abstract: A method is put forward to determine the classification number of elevation anomaly with terrain entropy.The ratio of distance and terrain entropy is taken as an index to select the center points of polyhedral function.On this basis,height anomaly surface is fitted with the selected center points.In order to compare the advantages and disadvantages of various methods,the outside precision is taken as an index to evaluate the accuracy of various methods.The results show that the accuracy of surface fitting using terrain entropy and clustering is 28% higher than that using clustering analysis alone,is 48% higher than that using terrain entropy alone.

Key words: elevation anomaly, polyhedral function, terrain entropy, cluster analysis

CLC Number:

P223

SUN Jialong, GUO Shuyan, LONG Bingxin, QIN Siyuan. A Polyhedral Function Fitting Method of Elevation Anomaly with Terrain Entropy and Clustering[J]. 测绘通报, 2018, 0(11): 86-89.

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A Polyhedral Function Fitting Method of Elevation Anomaly with Terrain Entropy and Clustering

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