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Proceedings Paper

A method to construct instantaneous depth model based on a grid tidal model and chart data
Author(s): Lihua Zhang; Chenghu Zhou; Fenzhen Su; Jun Xu; Zhu Wang
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Paper Abstract

Nowadays a depth delineated in a chart is a static depth based on the chart datum, whereas what the ship navigation should consider is an instantaneous depth, namely, the sum of the static depth and dynamic tide height. Aim to the shortage in depth representation, a method to construct an instantaneous depth model based on a grid tidal model and chart data is proposed. Firstly, a regional grid tide model around China is developed based on the Princeton ocean model (POM) using "blending" assimilation approach, and the continuous spatial-temporal tide heights are predicted. Secondly, the tide grids serving for all depths in the chart are determined, the depths are located efficiently in these grids and corresponding tide heights are obtained. Finally, Instantaneous depths are computed and displayed dynamically. Experimental results indicate that the proposed method is efficient for dynamic representation of instantaneous depths, and is also accurate for the representation in wide and plane sea areas.

Paper Details

Date Published: 4 November 2010
PDF: 8 pages
Proc. SPIE 7841, Sixth International Symposium on Digital Earth: Data Processing and Applications, 78411S (4 November 2010); doi: 10.1117/12.873284
Show Author Affiliations
Lihua Zhang, Dalian Naval Academy (China)
Institute of Geographic Science and Natural Resources Research (China)
Chenghu Zhou, Institute of Geographic Science and Natural Resources Research (China)
Fenzhen Su, Institute of Geographic Science and Natural Resources Research (China)
Jun Xu, Dalian Naval Academy (China)
Zhu Wang, Dalian Naval Academy (China)


Published in SPIE Proceedings Vol. 7841:
Sixth International Symposium on Digital Earth: Data Processing and Applications
Huadong Guo; Changlin Wang, Editor(s)

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