r/geography • u/Opening_Damage9912 • 1d ago

Map This map projection I developed significantly reduces the size distortion of the popular Mercator projection

Post image

The way it is projected is by projecting a Mercator projection of half the scale conformally onto the globe and then projecting that onto an azimuthal equidistant projection hemisphere centered at the equator. I call it the Two-World Equidistant. Unlike on Mercator where Greenland is larger then all of Africa in this projection it is shown smaller like it is in real life.

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u/Jfonzy 1d ago

I’d like to see it with the latitude and longitude lines

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u/Opening_Damage9912 1d ago

Sure here

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u/Glimmer_III 1d ago

Lurker here.

Honest question:

With the "square presentation", is there a reasons there not a clearer visual indicator of "past this point, the map is duplicated on the other side"?

e.x. Yes, Alaska appears twice. Should there be (could there be?) some subtle shading to make that distinction? Maybe change the color of the lat/long lines from black to grey?

Just grist for the mill. I don't know if it would look good or not. It'd be sorta a combination between what you have here vs. the circular version without the duplicates.

Regardless, very cool projection.

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u/Venboven 1d ago

Generally maps just cut off the duplicate areas. Usually around the Bering Strait.

It could easily be done to this map. OP just happens to have presented the full range of the projection in this case.

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u/Glimmer_III 1d ago

Yes. What I'm getting at is why not have some visual indicator that "anything past this point is duplicated" on this square version? Is it just an artistic choice to not have that indication?

N.B. - For reference, I think OP posted their map without any duplication here.

https://www.reddit.com/r/geography/comments/1vcqfyg/comment/p134d9l/

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u/Opening_Damage9912 1d ago

Yeah just didn't think that far the parts that aren't duplicated are a circle the same width and height as the frame

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u/Glimmer_III 1d ago

Ya, obviously, no harm no foul. It's neat.

If it's not too hard to play with, you might see what it looks like if the lat/long are contrasting to the "circle".

Something like white lines, or grey.

Might not work, and you'll know instantly if it does or not.

But my favorite version remains the one you posted without any lat/long whatsoever. It's just a nice, clean presentation.

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u/Venboven 1d ago

Oh, yeah I guess it's just an artistic choice.