Hidden Point Bar Method for Precise Heighting

Abstract

Precise heighting by the hidden point bar method is investigated. The investigation includes development of the mathematical model, calibration of the hidden point bar, and comparison with precise leveling and precise trig heighting. The method is applied in the field at a coal-fired electric power generating plan. Both the field application and the comparison with precise leveling and precise trig heighting indicated that the level of precision is on the order of