高精度瞬时水深模型的一种构建方法

高精度的水深表达是舰船安全、经济航行的先导和基础。本文提出了一种构建高精度瞬时水深模型的方法,利用高密度的多波束水深数据作为静态水深,基于余水位订正的预报水位作为动态水位,通过高效集成静态水深和动态水位从而构建瞬时水深模型。实验证明:本文所提的构建瞬时水深模型的方法较传统的方法,准确率有了很大的提高;瞬时水深模型的精度与格网尺度有关;余水位是影响瞬时水深模型精度的一个重要因素。

A method of constructing a high-precision instantaneous depth model

High-precision instantaneous depth representation is a foundation of safe and economical navigation.This paper proposed a method for constructing high-precision instantaneous depth model(IDM).Firstly,high-density multibeam depth data was used as static depths.Secondly,forecasted water level based on residual water level correction was used as dynamic water.Finally,an instantaneous depth model was constructed by high-efficiency integration of the static depth and dynamic water level.Experimental results demonstrated: the precision of IDM constructed by the proposed method could be higher than that of IDM constructed by traditional method;the precision of IDM depends on grid scale;residual water level is an important influencing factor of IDM precision.