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Using a human head to demonstrate map projections (lemmy.world)

submitted 2 weeks ago by [email protected] to c/[email protected]

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[–] [email protected] 36 points 2 weeks ago (1 children)

This isn't representing projections of a human head. This is representing projections of the globe if the globe had a giant human head drawn on it instead of the continents.

[–] [email protected] 5 points 2 weeks ago (1 children)

But then you have to figure out how to transfer the drawing of the head onto the curved surface, and how you do that is going to determine how the projections look.

[–] [email protected] 6 points 2 weeks ago (1 children)

No, you can ignore that part. The image isn't showing how to accurately draw a head onto a surface, it's showing how this given head drawing would look in different projections.

[–] [email protected] 2 points 2 weeks ago* (last edited 2 weeks ago) (1 children)

Projections from what? You don't need a projection for a drawing, it's already a 2d image.

Edit: I realize that you can use it to compare the different projections to each other, but it doesn't show which one is more accurate overall. In this image it looks like they used the globular projection as the "default' with the most realistic drawing, and created the others based on that, but they could have picked any one of them to be the default.

[–] [email protected] 1 points 2 weeks ago* (last edited 2 weeks ago)

Yes, again, that's the point.

It assumes the sphere projection is correct, and shows how each of the 2D projections isn't correct. This isn't hard.