简述全站仪的构成及测设图根控制点的基本原理，分析布设图根控制点的测量精度并得出结论。
The form of electronic total station and the basic principle of determining and setting up root control points were related briefly. The accuracy of setting up root control points was analysed.
在神朔铁道神木至大柳塔段，为了解地下煤窑空洞与隧道情况，布设了6条测线，共计388个测点，进行了地磁总强度观测工作。
From Shenmu to Daliuta section along Shensuo railway, we set up 6 survey lines in order to understand the condition of underground coal pit and tunnel.
在神朔铁道神木至大柳塔段，为了解地下煤窑空洞与隧道情况，布设了6条测线，共计388个测点，进行了地磁总强度观测工作。
From Shenmu to Daliuta section along Shensuo railway, we set up 6 survey lines in order to understand the condition of underground coal pit and tunnel.
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