Humboldt meridian

The Humboldt meridian in California, longitude 124° 07' 10" west from Greenwich, intersects the base line on the summit of Mount Pierce at latitude 40° 25' 02" north (co-ordinates in NAD27 datum),^[1] and governs the surveys in the northwestern corner of California, lying west of the Coast Range of mountains, and north of township 5 south, of the Humboldt meridian system.^[2] This principal meridian was established in 1853.^[3]

Meridians and baselines of California: Humboldt, Mt. Diablo, and San Bernardino

See also

• List of principal and guide meridians and base lines of the United States