深度基准 sounding datum 海图及各种水深资料的深度起算面。同义词：海图基准面．
由于沿海各深度基准面的差异，使得海洋测绘数据综合处理存在一定的困难。
One of the main obstacles is caused by various expression of depth datum for hydrographic data integration.
本文还讨论了各种深度基准面改正数在浙江沿海的分布场，并调绘了各改正数的分布图。
We have also discussed the scatter fields about correction of sounding data and have drawn their scatter diagrams along the Zhejiang coast.
近代历史海图数学基础的转换；浙江海区近代历史海图的平面坐标改正和深度基准面改正。
The transformation on mathematical basis of modern historic chart, the correction of the horizontal coordinate and depth data on the charts for the waters off Zhejiang coast are elaborated.
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