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geographical mile[¦jē·ə¦graf·ə·kəl ′mīl]
The length of 1 minute of arc of the Equator, or 6087.08 feet (1855.34 meters), which approximates the length of the nautical mile.
It is the length of the arc of the earth's equator subtending an angle of 1° at the center of the earth. It is constant in length and equal to 1855.3 m or 6087.2 ft.