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The world on Van der Grinten projection (2011) (infosec.pub)

submitted 1 week ago by Innerworld@lemmy.world to c/earthscience@mander.xyz

6 comments fedilink hide all child comments

The Van der Grinten projection is a compromise map projection that is neither equal-area nor conformal. It projects the entire Earth into a circle, though the polar regions are subject to extreme distortion. The projection was proposed by Alphons J. van der Grinten in 1904, and, unlike perspective projections, is an arbitrary geometric construction on the plane. It was adopted as the National Geographic Society's reference map of the world from 1922 until 1988.

15° graticule. Imagery is a derivative of NASA’s Blue Marble summer month composite with oceans lightened to enhance legibility and contrast. Image created with the Geocart map projection software.

Author: Strebe

CC BY-SA 3.0

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[–] CombatWombat@feddit.online 1 points 1 week ago (1 children)

Well, I mean, of course you would want to avoid being either conformal or equal-area. As an experienced cartographer, I am both intimately aware of the technical meaning of both those terms, and their drawbacks in map composition.

[–] Galapagon@sh.itjust.works 3 points 1 week ago (2 children)

Could you please explain it to a pleb like me senpai?

[–] marcos@lemmy.world 3 points 1 week ago (1 children)

A conformal projection makes straight lines appear on the map with the same relative direction they appear on the surface.

An equal-area projection makes the areas of parts of the map proportional to the area of the surface they represent.

That map on the post is neither. The most useful maps are normally neither.

[–] porcoesphino@mander.xyz 2 points 1 week ago

Doesn't "useful" depend a lot on application and that's why we have more than one map type?

[–] CombatWombat@feddit.online 2 points 1 week ago

No because I was lying and have no idea what any of that means lol