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how to calculate distance between two points latitude longitude. Even if you were to substitute it with the radius of a sphere assuming the Earth is spherical at 34377468 NM you will not be near the real accurate distance. While Heading is an angle or direction where you are currently navigating in.
Latitudes and longitudes may be entered in any of three different formats decimal degrees DDDD degrees and decimal minutes DDMMMM or degrees minutes and decimal seconds DDMMSSSS. 37 39 101561 S. Formula to Find Bearing or Heading angle between two points.
The distance gradually shrinks to zero as they meet at the poles.
144 25 295244 E. At 40 degrees north or south the distance between a degree of longitude is 53. Given two points with these coordinates. A minute is thus 694460 1157 miles and a second is 11560 00193 miles or about 101 feet.