典型海湾区域海洋测绘中垂直基准的构建研究

Vertical Datum Establishment in Hydrographic Surveying and Charting of a Typical Gulf Region

以典型的海湾区域为例,基于可行实用原则并保证精度的情况下,对陆海垂直基准的传递和统一进行研究,结合平均海面传递和GPS高程拟合方法,构建了典型海湾区域统一的海洋测绘垂直基准,实现了海湾区域海洋测绘中海岸地形图和水深图的无缝拼接。通过实例研究表明:研究路线正确,选择方法可行,成果精度符合《规范》要求,满足海湾区域测图的需要。

Taking a typical gulf region for example, the paper studies the transfer and unification of land and sea vertical datum according to practical principles and accuracy. This paper combines methods of MSL transfer and GPS height fitting to set up the unified vertical datum in the typical gulf region. It carries out the seamless contiguity of coastal topographic maps and bathymetric charts. The study shows that the algorithm is feasible and the technique route is very correct, and it can meet the demands of mapping in gulf regions.