IPC Subgroup
G01C 3/24 using a parallactic triangle with fixed angles and a base of variable 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 fixed angles and a base of variable 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