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en.wikipedia.org/wiki/Nautical_mile

A nautical mile is a unit of measurement defined as 1,852 meters (6,076.1 ft; 1.1508 mi). Historically, it was defined as one minute of latitude, which is equivalent to one sixtieth of a degree of latitude.

en.wikipedia.org/wiki/Latitude

In geography, latitude is a geographic coordinate that specifies the north–south position of a ... Since there are many different reference ellipsoids, the precise latitude of a feature on the surface is not unique: this is .... With this value for R the meridian length of 1 degree of latitude on the sphere is 111.2 km or 69.1 miles.

en.wikipedia.org/wiki/Longitude

Longitude is a geographic coordinate that specifies the east-west position of a point on the Earth's surface. It is an angular measurement, usually expressed in degrees and denoted by ... As to longitude, I declare that I found so much difficulty in determining it that I was put to great pains to .... 15°, 110.649 km, 107.551 km.

gis.stackexchange.com/questions/142326/calculating-longitude-length-in-miles

Apr 12, 2015 ... It doesn't matter at what longitude you are. What matters is what latitude you are. Length of 1 degree of Longitude = cosine (latitude in decimal ...

msi.nga.mil/MSISiteContent/StaticFiles/Calculators/degree.html

Length of a Degree of Latitude and Longitude. This page allows calculation of one degree of latitude and longitude. Lengths are calculated in nautical miles, ...

For convenience they are ordered into scales made up of degrees ( ° ) and ... The distance between degrees of longitude is about 60 nautical miles at the ...