G01C
MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
G01C
MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
G01C5/00
Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels
G01C5/00
Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels