Nippon Telegraph and Telephone Corporation

Yamaha Hatsudoki Kabushiki Kaisha

Kenji Hiyoshi

Suguru Oguchi

Yoshihiro Iriyama

Norihiro Takeda

An absolute coordinate acquisition method is an absolute coordinate acquisition method for acquiring absolute coordinates of an underground pipeline, the method including: a marking step Sof setting a plurality of reference points on a road surface and setting a measurement point on a pipeline installed inside an excavated ditch; a measurement step Sof measuring absolute coordinates of the reference points; a relative position calculation step (Sto S) of calculating relative positions of the reference points and the measurement point to a reference position; and an absolute coordinate calculation step Sof calculating absolute coordinates of the measurement point based on the absolute coordinates of the reference points and the relative positions of the reference points and the measurement point.

Growing community of inventors

Tokyo, Japan

Kenji Hiyoshi