| 摘要 |
PROBLEM TO BE SOLVED: To solve the connectional problem that much time is required until a surveying instrument 1 equipped with an automatic tracking function recaptures a reflecting prism 21, after the surveying instrument 1 has lost sight of the reflecting prism 21, when the surveying instrument 1 automatically tracks the reflecting prism 21 for measuring the plane coordinates of a plurality of surveying points S. SOLUTION: A DGPS antenna 3 is attached to the reflecting prism 21. The position of the reflecting prism 21 is measured by DGPS. When the surveying instrument 2 loses sight of the reflecting prism 21, the position of the DGPS- positioned reflecting prism 21 is transmitted to the surveying instrument.
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