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For the OP projection, the best centre seems to be around the Isle of Man. Edit: Just north of Cornwall gets most of the land except SEA, southern tip of South America and Australia+Antarctica.

I just like properly split sinusoidal map the most though [0] Sinusoidal map is where you start at the pole and unwrap the circles of latitude.

[0] https://en.wikipedia.org/wiki/File:Usgs_map_sinousidal_equal...

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Respectfully, disagree completely. Like somebody else stated, clicking in the Arabian Sea just to the west of India neatly splits the two circles without cutting continents. One circle becomes Africa / Europe / Asia / Australia, the other becomes North & South America.

Example: https://imgur.com/rgeg1Lc

Oh yea, that's a good one. Too bad you have to reset after each try, makes it hard to experiment.

If your metric is the length of the land that the map boundary cuts, then the best centre lies somewhere in the Indian Ocean. Proven here: [1]

[1] https://marcinciura.wordpress.com/2015/11/17/slicing-earth-c...

I seem to have found this one, basically: https://marcinciura.wordpress.com/min-land-4/ But my metric wasn't as much intersection as maximum land area in one half.

edit: I didn't even know about this: https://en.wikipedia.org/wiki/Land_and_water_hemispheres

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