在线路施工的补充测量控制中，对先期控制点老坐标的如何使用，关系到新坐标的网形精度和与老坐标的差异程度。
In additional control survey of route construction, how to use the coordinates of old control points affects both the precision of new coordinate and the difference between old coordinate and the new.
在线路施工的补充测量控制中，对先期控制点老坐标的如何使用，关系到新坐标的网形精度和与老坐标的差异程度。
In additional control survey of route construction, how to use the coordinates of old control points affects both the precision of new coordinate and the difference between old coordinate and the new.
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