Why are map's elevation scales often given in feet and meters?

Question

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How many degrees separate the Tropic of Capricorn from the Arctic Circle?
93.5 degrees latitude???

Answer 1

The scale is given in both feet and meters because people in the U.S. use feet, but most other people in the world use meters.

The number of degrees is between the Arctic Circle and the Tropic of Capricorn is closer to 90 degrees.

http://www.worldatlas.com/aatlas/imagee.htm