| 摘要 |
PROBLEM TO BE SOLVED: To make a position attached with a positioning instrument such as a GPS antenna attached to a floating body or an inclinedly temporarily laid caisson determined accurately relatively to the floating body or the like, so as to allow accurate survey. SOLUTION: When the positioning instrument such as the GPS antenna is attached to the floating body or the like to measure the attaching position for the positioning instrument, total station is installed on the floating body, three points on X', Y' and Z' axes are surveyed to find a coordinate system of the total station in a condition where a vertical angle correcting function for the total station is paused, then three-dimensional coordinate transformation by rotation correction around respective axes of X, Y and Z axes in a coordinate system serving as a reference for the floating body is applied to a measured value found in the coordinate system installed with the total station, and the coordinate axes are conformed to measure the position of the positioning instrument with respect to the floating body.
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