this post was submitted on 24 Jan 2026
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[–] scala@lemmy.ml 2 points 1 day ago (4 children)

Anyone know of a 2D map print of true size? All I've found print wise is Mercator or other such variations.

[–] fossilesque@mander.xyz 4 points 1 day ago (1 children)

Mathematically impossible, but you could try an Equal Area projection.

[–] ChaoticNeutralCzech@feddit.org 3 points 1 day ago (1 children)

Equal area projections usually preserve straight and perpendicular meridians and parallels. That's neutral but then there's the political decision of what latitude gets the correct aspect ratio. And Gall-Peters is not anti-colonialist if representing Africa correctly was your goal.

[–] scala@lemmy.ml 2 points 23 hours ago

Essentially this. A true sized projection, it can be in any "cut" of the globe as long as all the continents are true to size.

[–] Denixen@feddit.nu 4 points 1 day ago (1 children)

Let me know if I understand correctly. You want a true to life sized map of earth? 😳

[–] Mycatiskai@lemmy.ca 3 points 1 day ago (4 children)

They want a 2d map of earth but with every continent to true size at scale, rather than Mercator projection where the northern hemisphere is expanded to increase their importance over the southern hemisphere.

[–] Denixen@feddit.nu 1 points 13 hours ago

Ah that makes a lot more sense! 😅

[–] scala@lemmy.ml 2 points 1 day ago
[–] snapoff@sh.itjust.works 2 points 1 day ago (1 children)

Mercator wasn’t created in order to increase importance of the northern hemisphere, but to allow for directional rhumb lines to be drawn for shipping. For its intended purpose of navigation, it does an excellent job.

[–] Mycatiskai@lemmy.ca 2 points 1 day ago* (last edited 23 hours ago) (2 children)

It may not be the intended purpose but I certainly does change how the world is seen by everyone using it to warp the mind's eye to how the world actually physically is.

Edit: Does it do an excellent job for navigational purposes if you are shipping from Japan to Brazil or it it only excellent for shipping from the northern hemisphere to the northern hemisphere?

[–] SlurpingPus@lemmy.world 3 points 22 hours ago

Do you seriously think that the geometrical properties of the projection change below the equator? You need to learn this thing called geometry.

[–] tigeruppercut@lemmy.zip 3 points 22 hours ago

It works for any shipping lines

The Mercator projection was designed for use in marine navigation because of its unique property of representing any course of constant bearing as a straight segment. Such a course, known as a rhumb (alternately called a rhumb line or loxodrome) is preferred in marine navigation because ships can sail in a constant compass direction.

https://en.wikipedia.org/wiki/Mercator_projection

That's not why Mercator exists

[–] MajorasTerribleFate@lemmy.zip 1 points 21 hours ago

Technically, the outer surface of a sphere is, itself, two-dimensional. It is, however, non-Euclidean and cannot be perfectly preserved in a Euclidean two-dimensional space.

[–] selokichtli@lemmy.ml -1 points 1 day ago (2 children)

I don't know what you mean by "other such variations", but maybe you are looking for a map with something like the Mollweide projection? That's a bit of distortion in shape but trying to keep areas real.

[–] WhiskyTangoFoxtrot@lemmy.world 1 points 21 hours ago (1 children)

What do they call the projections that have slices taken out of them at the oceans?

[–] selokichtli@lemmy.ml 1 points 21 hours ago (1 children)

The projection is the mathematical transformation from the curved surface of the Earth to a mathematical surface. You can have types of projections based on the mathematical surface (conical, cylindrical...), or based on the features they want to rescue from this transformation (conformal, equal-area...), but, sorry, I've never heard of a classification based on these "slices". Moreover, now that I think of it, even those projections we are familiar with have to be cut somewhere.

[–] WhiskyTangoFoxtrot@lemmy.world 1 points 21 hours ago (1 children)

Another post in this thread had an example of one, called Goode's Homolosine Equal-area Projection.

[–] selokichtli@lemmy.ml 1 points 20 hours ago

No, I know what you mean but that looks like some azimuthal projections put together in some conventional way. Maybe the concept you are looking for is a "composite" projection.

[–] scala@lemmy.ml 1 points 1 day ago* (last edited 19 hours ago) (2 children)

No, because Africa is larger than Russia, this shows Russia as massive.

[–] MajorasTerribleFate@lemmy.zip 1 points 21 hours ago (1 children)

Africa: 30.3 million km²

Asia: 44 million km²

Nowhere near the difference Mercator projection maps make it out to be, but Asia definitely is larger.

[–] scala@lemmy.ml 1 points 19 hours ago
[–] selokichtli@lemmy.ml 0 points 23 hours ago

You may want to double check that, or you probably will need an imaginary map.