The Montana meridian extends north and south from the initial monument on the summit of a limestone hill, high, longitude 111° 39′ 33″ west from Greenwich, and, with the base line on the parallel of 45° 47′ 13″ north latitude, governs the surveys in the state of Montana.Nash, Stewart (01 February 2014) "Initial Point of Montana" Frederick, Maryland: The American Surveyor Magazine. The initial point lies near Willow Creek, Montana.
See also List of principal and guide meridians and base lines of the United States
References
Sources
External links