How to compute distance between two spherical Mercator points

by ericg   Last Updated May 15, 2019 21:22 PM

I am computing the Mercator points according to the top answer at Convert latitude/longitude point to a pixels (x,y) on Mercator projection.

Now that I have two Mercator points on a spherical projection, how do I compute the distance between them?

For some background, what I am attempting to do is implement the answer at How to calculate the optimal zoom-level to display two or more points on a map and am stuck at step #2 where I need to compute the distance.

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