National Height Datum 国家高程基准
Fall height datum 坠落高度基准面
On Height Datum 高程基面问题浅议
Falling height Datum 坠落高度基准面
1985 National Height Datum 国家高程基准
height above datum 基准面以上高程
height t datum 高程基准面
chart datum height 海图基准高程
There is a close correlation between sea level slope and height datum, in which geodesylists and oceanographers are interested.
海面倾斜与高程基准密切相关，它已经受到大地测量学界和海洋学界的重视。
The reason why GPS leveling cant be used for height transfer across obstacle is that the height datum of both sides of obstacle is not consistent.
GPS水准无法直接应用于跨障碍高程传递，其关键原因在于障碍物两侧的高程基准不一致。
The key of GPS leveling across sea is that the height datum on each side of channel is not consistent, so the general geometrical fitting method can not be used directly.
GPS跨海水准的关键问题是海峡两侧的高程基准不一致，因此无法采用常规的数值拟合方法。
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