How close are two locations to being opposite?

The Antipode Coefficient: If you take two locations, A & B, how far is B from A compared to the antipode of A? Or simply, what percentage of the way to the other side of the Earth, is B from A?

e.g. New York is 27% of the way around the world from Oxford, where 100% would be if you drilled a hole from Oxford through the center of the Earth and popped out the other side.


The Wardell Antipode Namesake Coefficient: The antipode coefficient, except B is A's namesake.

e.g. Camberwell in Melbourne is named after Camberwell in London and is 84% of the way to the opposite side of the Earth


Challenge: Can you find the greatest Wardell Antipode Namesake Coefficient (WANC)?

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Locations

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Enter both locations below to calculate the antipode coefficient.

(e.g. Camberwell, Victoria is the namesake of Camberwell, London)

Antipode Coefficient: N/A

OR

Location B is N/A% across the world from Location A

Map

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Display the locations below to see how far they are on a map.