Montana Meridian

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The Montana Meridian extends north and south from the initial monument on the summit of a limestone hill, 800 feet (244 meters) high, longitude 10 38' 50" west from Greenwich, and, with the base line on the parallel of 45° 46' 48" north latitude, governs the surveys in the state of Montana. The initial point lies near Willow Creek, Montana.

[edit] Source

• Raymond, William Galt (1914). Plane Surveying for Use in the Classroom and Field (via Google Books), New York: American Book Company.