Indian meridian
The Indian meridian, in longitude 97° 14′ 30″ west from Greenwich, extends from Red River to the south boundary of Kansas, and, with the base line in latitude 34° 30′ north, governs the surveys in Oklahoma east of 100° west longitude from Greenwich.
This line was chosen arbitrarily as part of the land survey of 1870 conducted by E. N. Darling and Thomas H. Barrett, at an arbitrary point about one mile south of Fort Arbuckle. From this initial point, the north-south line was designated as the Indian meridian and the East–West line was designated as the Indian baseline.
The Indian Meridian initial point is listed in the National Register of Historic Places with ID #70000533.
