| 摘要 |
PROBLEM TO BE SOLVED: To construct a system at low costs and to improve positioning accuracy.SOLUTION: A position measuring system includes a low bar 1 capable of obtaining a measuring value of a three-dimensional position by a GPS together with measuring time, a reference point position measuring device 2 for measuring a GPS position measuring value with three-dimensional positions set at a plurality of existing points, and a low bar position calculation device 3 capable of communicating with the low bar 1 and the reference point position measuring device 2. The low bar position calculation device 3 generates a difference triangle having three corresponding points selected from a plurality of existing position points within a difference space having a difference between the existing value of a measuring point at the existing position point and a measuring value set corresponding to a plane position, and corrects the measuring value of the low bar 1 with an interpolation or extrapolation value of the difference triangle at the plane position based on the measuring value of the low bar 1 to output the result to the low bar 1. |
