D'lat and D'long

DIFFERENCE IN LATITUDE (D'lat )


The D'lat  between two places is the arc of the meridian or angel at the center of  the earth contained between parallels latitude through the two places.
D'lat is named North or south according to the direction from the first place to the second.


DIFFERENCE IN LONGITUDE (D'lat )

The D'long  between two places is the shortest arc of the equator or the smaller angle at the poles contained between the meridian through the two places.
D'long is named East or West according to direction from the first place to second place.

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