Black Hills Meridian

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The Black Hills Meridian, longitude 104* 03' west from Greenwich, with the baseline in latitude 44° north, governs the surveys in the state of South Dakota, north and west of White River, and west of the Missouri River (between latitudes 45° 55' 20" and 44° 1f 30"), the north and west boundaries of the Lower Brule Indian Reservation, and the west boundary of range 79 west, of the Fifth Principal Meridian system.

[edit] Source

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