基于时空Kriging方法建立深度基准面模型  

Establish the Depth Datum Model with Space-time Kriging Method

作　　者：袁建刚[1] 章鹏[2] 

机构地区：[1]江苏城乡建设职业学院,江苏常州213147 [2]河海大学地球科学与工程学院,江苏南京210098

出　　处：《测绘与空间地理信息》2017年第12期219-220,224,共3页Geomatics & Spatial Information Technology

摘　　要：深度基准面是一个呈阶梯状、不连续的基准面,该特点给海洋测绘及相关活动带来严重的影响。目前建立深度基准面模型的方法有很多,一般采用几何插值方法,其函数模型大多以数据点的位置关系为基础。本文使用时空Kriging法建立深度基准面模型,时空Kriging法综合考虑了海面在时间和空间上的变化特征,通过构建不可分离型时空变异函数,对深度基准值进行插值拟合,并通过实例证实了拟合后的深度基准面模型的精度更高、连续性更好。The depth datum is a datum of step shape and discontinuity,it has bring serious impact to the marine surveying and mapping and related activities,in the current we always use geometric interpolation or fitting method to establish the depth datum model,the model is mostly based on the position of data points. This paper use the space-time Kriging method to establish the spatial datum model,space-time Kriging method considering the characteristics of sea level change in time and space,interpolation and fitting depth datum value by constructing the inseparable spatiotemporal variation function,and confirmed higher precision and better continuity of the depth datum fitting model by an example.

关 键 词：深度基准面 时空Kriging 变异函数 几何插值 

分 类 号：P223.0[天文地球—大地测量学与测量工程]