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Publication of IT500364ApublicationCriticalpatent/IT500364A/it
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
G01C5/02—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels involving automatic stabilisation of the line of sight