assuring rate of depth datum [测] [海洋] 深度基准面保证率
depth datum planes 深度基准面
theoretical depth datum 理论最低低潮面
theoretical depth datum tdd 海图理论深度基准
depth at chart datum 基准面下深度
One of the main obstacles is caused by various expression of depth datum for hydrographic data integration.
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。
In this paper, the observed land surface height data and tidal data in the Yellow River delta foreland area are used to describe the variations in depth datum and tidal level in the area.
通过黄河三角洲前沿陆地高程的变化和验潮获得的资料，介绍了黄河三角洲前沿深度基准面的变化和潮位变化情况。
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