I am studying a subject related to the Greek Eratosthenes, as measured by the
circumference of the earth, but I have a problem with measuring the distance
between 2 points (coordinates) formulas I used were taken from writings of Carl
Sabanski, who says that books are ancient astronomy. No further information;1 °
latitude = 111,133 to 0,559 cos (2 x latitude) [km]1 ° longitude = 111,413
cosine (latitude) - 0.094 cos (3 x latitude) [km]By calculation using the
formula 1 ° latitude, for each grade, from 0 ° to 90 ° for the southern
hemisphere and 1 ° to 90 ° for the northern hemisphere the result is 40,231.264
miles, and as I read the value is 40,009.15 kmI have not found more formulas or
ways of doing the calculation to get a better result.
I will thank answers
Best Regards
Axel
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