After implementing the Distance through the Earth calculator, I have a thought that it makes more sense, and more fun to view distance across the surface of the Earth and distance through the Earth side-by-side and be able to compare them. So, the calculator below combines the outputs of Distance through the Earth and Distance calculator calculators and compares them. I used New York and San Francisco coordinates as default coordinates. Theory and formulas can be found at the abovementioned links.
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