vertical reference meaning in English

垂直基准线
垂直角的基准线

Horizontal and vertical reference points
平面及高程参考点
Geodetic surveying : establishment and maintenance of horizontal and vertical reference point
大地测量：设立及维修水平及垂直参考点
However , considering contrast and creation at multi - levels and in multi - dimensions , the author intends to elaborate this issue from two aspects : horizontal comparison of vision and vertical reference to nationalism
然而，差异与创新是多层次、多方面的、应从更宽阔的横向视域角度、纵向参照坐标的民族性两个方面加以论述。
The geoid is used to be regarded as the theoretic global vertical reference . the actual national height references are regional mean sea levels determined by tide gauge station . the difference between them is apparent
大地水准面作为全球高程测量的理论基准面，在现实工作中，国家或者地区高程系统的起算面是利用验潮方法来确定局部平均海平面的，两者之间的差距是显而易见的。