registered surveyor; licensed surveyor
A professional qualification in Japan; a person who has passed the national surveyor examination and is registered to conduct cadastral and other official surveys.
彼は測量士の資格を取るために勉強している。
He is studying to obtain his surveyor's license.
The registered surveyor confirmed the land boundaries.
測量士補 is an assistant surveyor qualification, a step below 測量士.
Compound of 測量 (surveying) + 士 (professional, specialist).