摘要
提出一种基于趋势面优化与克里金插值组合的IZDEM建模方法。通过最优等价权控制不同源数据精度差异对建模质量的影响,优化拟合潮滩地形的趋势面;利用克里金插值方法,顾及潮滩地形变化的各向异性构建残差面,最后利用优化的趋势面和残差面组合构建IZDEM。实验表明,在利用多源潮滩数据构建IZDEM时,本方法可以提高IZDEM的整体建模质量。
Aiming at the characteristic of multi-data and evident anisotropy of DEM Construc- tion in intertidal zones（IZDEM）, a new method based on combining optimal trend surface and Kriging interpolation is proposed. First, an optimal trend surface is obtained using an optimal equivalent weight to control the influence of precision difference between different source data to the quality of IZDEM. Then, corresponding residuals surface is constructed by kriging interpolation to recapture finer details lost from smoothing. IZDEM is constructed by combining optimal trend surface and residuals surface. Experimental results demonstrate that the proposed method has improved the quality of IZDEM.
出处
《武汉大学学报（信息科学版）》
EI
CSCD
北大核心
2013年第10期1178-1183,共6页
Geomatics and Information Science of Wuhan University
基金
国家自然科学基金资助项目(41171349)
国家863计划资助项目(2012AA12A406)
