... straight triangle 直伸三角形 striding level 跨水准 strip aerial triangulation 航带法空中三角测量 ...
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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 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.
根据以上设想进行的研究试验表明，“天文GPS水准”克服了单纯GPS水准无法连接不同高程系统的困难，对于远距离跨障碍高程传递是一种有效的高精度方法。
The study and experimentation based on the above thought show that GPS astronomical leveling is an effective and high precision method for height transfer across obstacle with long distance.
详细介绍了光学测微法跨江水准测量方法、场地选择、场地布设、砚板制作、观测方法、记录格式等内容。
This paper introduced the field selection, field planning, vane production, observation methods, and record format of river-crossing leveling in detail.
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