An Analysis of Accuracy for Submarine Topographic Information by Interpolation Method

J. Ocean Eng. Technol. 2006;20(3):67-76.

Kim Ga-Ya;Moon Doo-Youl;Seo Dong-Ju;

Division of Civil and Urban Engineering, Dongeui University;Division of Civil and Urban Engineering, Dongeui University;Division of Civil and Urban Engineering, Dongeui University;

보간기법에 따른 해저지형의 정확도 분석

김가야;문두열;서동주;

동의대학교 토목도시공학부;동의대학교 토목도시공학부;동의대학교 토목도시공학부;

Keywords: Global positioning system, Echo sounder, Submarine topography, Interpolation method, Dredging capacity

핵심용어: 범지구위치결정체계, 음향측심기, 해저지형, 보간법, 준설량

Abstract

Three-dimensional information of submarine topography was acquired by assembling DGPS and Echo Sounder, which is mainly used in the marine survey. However, the features of submarine topography, derived according to mechanical data, were confirmed using human eyes. Because the dredging capacity using a submarine surveying data influences harbor public affairs, analysis and the process method of surveying data is a very special element in construction costs. In this study, information on submarine topography is acquired by assembling DGPS and Echo Sounder. Moreover, the dredging capacity in harbor public affairs has been analyzed by the interpolation method: inverse distance to a power, kriging, minimum curvature, nearest neighbor, and radial basis function. Also, utilization of DGPS and Echo Sounder method in calculation of the dredging capacity have been confirmed by comparing and analyzing the dredging capacity and the actual one, as per each interpolation. According to this comparison result, in the case of applying Radial basis function interpolation and Kriging, 3.94 % and 4.61 % of error rates have been shown, respectively. In the case of the study for application of the proper interpolation, as per characteristics of submarine topography, is preceded in calculation of the dredging capacity relevant to harbor public affairs, it is expected that more speedy and correct calculation for the dredging capacity can be made.