using a parallactic triangle with variable angles and a base of fixed length in the observation station, e.g. in the instrument

Introduced: September 1968

Last revised: January 2006

Full Title

Measuring distances in line of sight; Optical rangefinders > using a parallactic triangle with variable angles and a base of fixed length in the observation station, e.g. in the instrument

Classification Context

Section:: PHYSICS
Class:: MEASURING; TESTING
Subclass:: MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY

4 direct subcodes

Child Classifications

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G01C 3/12 with monocular observation at a single point, e.g. coincidence type
G01C 3/14 with binocular observation at a single point, e.g. stereoscopic type
G01C 3/18 with one observation point at each end of the base
G01C 3/2 with adaptation to the measurement of the height of an object