national geodetic vertical datum 国家大地高程基准面
National Vertical Datum 1985 国家高程基准
vertical datum lines 垂直基准线
global vertical datum 全球垂直基准
assumed vertical datum 假定高程基点
Vertical datum network 垂直基准网
seamless vertical datum 无缝垂直基准
NAVD North American Vertical Datum 北美垂直向数据
vertical geodetic datum 垂直大地基准
The vertical datum line set up by this system can be used to monitor deformation of the various building.
用这种垂准系统建立的高度较大的垂准基线,可以用于超高层建筑物施工和变形监测。
The transforming of survey datum and the control of axis, vertical level, elevation are of great importance on controlling quality of high-rise building construction.
在高层及超高层建筑工程中,测量基准传递和轴线、垂直度、高程控制是建筑物施工质量控制的重点内容之一。
The establishment of datum is one of the important contents in the research on vertical crustal movement.
确定基准是研究地壳垂直运动的重要内容之一。
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