I'm going to postulate a bold and unintuitive hypothesis: the world has more southfacing coastline than northfacing coastline (in total distance). Do you agree or disagree? Discuss!
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After 30 whole seconds of thought, I concur. My intuition, including a lot of handwaving, is it's a consequence of having more landmass in the northern hemisphere.
That was my thinking, exactly. But it's not obvious. I think the point @_pauldale_ makes about Antarctica is on the right lines, but overcompensated for by the land in the northern hemisphere.
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Oh right, I was so focused on the geometry that I completely missed the singularity at the poles (and Antarctica)
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What does where the land mass lies have to do with it? All of the land masses except for Antarctica have north and south. The major factor is the shape.
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Imagine a «square on a sphere» landmass delimited by two meridians east and west and two parallels north and south. If it's fully in the N hemisphere, the N coastline will be shorter than the S coastline. If in the S hemisphere, the reverse holds.
End of conversation
New conversation -
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And maybe a sinusoidal projection - https://en.m.wikipedia.org/wiki/List_of_map_projections#/media/File%3ASinusoidal_projection_SW.jpg …
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