顾及潮汐变化的动态可航水域表示模型及方法研究

Research on real-time visualization model and technique of navigable area with regard to tide

自20个世纪90年代末起,GIS技术开始得到广泛的应用。随着应用领域的不断扩展和相关研究的日益深入,GIS技术的发展出现了新的趋势:时间被引入到空间分析中来,随之而产生了TGIS,时间的引入为GIS技术的发展注入了新的活力。本文所研究的就是TGIS技术在近岸海上航行中的应用问题:以电子海图显示系统为平台,在引入潮汐等随时间变化较为显著且影响较大的相关要素的前提下,通过建立实时水深模型、动态等深线勾绘模型和区域生成模型等与时间要素密切相关的数学模型,实现舰船可航水域表示模型的动态实时快速构建。

Since the late 90s of last century, GIS has being applied to more and more fields. With the development of the technique, more and more people pay attention to the factor of time, i.e. the new temporal-GIS system should be able to analyze spatiotemporal factors in the real world. This paper presents a research project suggesting the use of spatio-temporal techniques as navigation aid onboard ships. Firstly, it constructs the model of real-time soundings, dynamic depth contours drawing and area generation and so on. Then, it presents the navigable area based on a digital nautical chart with regards to navigational information, such as the tide, the real-time soundings, ocean current and so on.