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CHART DATUM FOR HYDROGRAPHY

机译:水文图表图表

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This paper sets out to discuss ongoing activities in the tide and chart datum components of hydrography and charting. It expands on the paper presented at FIG (Federation Internationale des Geometres) in Brighton 1998 by Mr Matt Higgins and is a revised and updated version ot the paper Chart Datum for Hydrography by GPS delivered by the present authors to the Survey 99 Congress, Sunshine Coast, Queensland, Australia, 6-9 October 1999. Mr Higgins' paper (co-authored by the present authors) introduced the concept of relating hydrographic chart datum and the ellipsoidal heights measured by global positioning system survey for the purpose of reinstating tidal benchmarks situated on offshore structures. That concept has been extended to hydrographic surveying to eliminate the need to know the tidal height for use when reducing the soundings to chart datum.
机译:本文着手讨论水文和制图的潮汐和图表基准要素中正在进行的活动。它扩展了Matt Higgins先生于1998年在布莱顿举行的FIG(地理国际联合会)上提交的论文,是对本论文的作者提交给阳光海岸99号测量大会的GPS航图水文基准图论文的修订和更新。 ,澳大利亚昆士兰州,1999年10月6日至9日。希金斯先生的论文(由作者合着)介绍了有关水文海图基准面和通过全球定位系统调查测量的椭球高相关的概念,以恢复潮汐基准。在海上结构上。该概念已扩展到水文测量,以消除在将测深仪减小到基准数据时需要知道使用的潮高的需求。

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