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I thought that too. http://en.wikipedia.org/wiki/Mercator_projection http://en.wikipedia.org/wiki/Mercator_projection Which map projections would you choose? A

by castell 11y ago

I thought that too. http://en.wikipedia.org/wiki/Mercator_projection http://en.wikipedia.org/wiki/Mercator_projection Which map projections would you choose? A difficult decision: http://en.wikipedia.org/wiki/List_of_map_projections http://en.wikipedia.org/wiki/List_of_map_projections

anc84 11y ago
Robinson or Winkel-tripel like National Geographic does.
- coldpie 11y ago
  Hammer retroazimuthal, back hemisphere. Which is, coincidentally, also my favorite skateboarding move.
  - HCIdivision17 11y ago
    This is really cool looking, and I have no idea what you'd use it for. And this is just the neatest thing to play with: https://www.jasondavies.com/maps/hammer-retroazimuthal/ https://www.jasondavies.com/maps/hammer-retroazimuthal/
    - fennecfoxen 11y ago
      "As a retroazimuthal projection, azimuths (directions) are correct from any point to the designated center point." (-- Wikipedia, which knows everything and is never wrong.) It looks like one retroazimuthal variant (the Craig retroazimuthal) is sometimes called the "Mecca projection", so you know which way to kneel at sundown if you're into that sort of thing.
  - fennecfoxen 11y ago
    Okay, hipster. Transverse Mercator, south-oriented. https://trac.osgeo.org/proj/wiki/TMSO https://trac.osgeo.org/proj/wiki/TMSO
sesqu 11y ago
Azimuthal equidistant on my house.
logfromblammo 11y ago
If you have to do it yourself anyway, why not make your own projection? I'd do a Dymaxion-style projection onto a truncated icosahedron (Goldberg polyhedron G(1,1), a.k.a. the soccer ball shape), with the poles centered in two of the pentagons, and as many edges as possible over bodies of water. Then I'd print each tile image and plaster it to its own mounting board, trimming the backs of the board edges to 69 degrees on all the hexagons and 73.5 degrees on all the pentagons. At that point, I'd permanently join the tiles with appropriate amounts of contiguous land mass, using brackets, and attach magnets to the remaining edges in such a way that you could assemble them like a puzzle. I'd rather have a gigantic globe (that can also be dismantled for moving or storage) than have a wall map.
contravariant 11y ago
Well, if you want something rectangular, preserving area, with vertical meridians then you automatically end up with a cylindrical area projection. If you want an aspect ratio of 3/2 (approximately) you end up with the Gall-Peters projection. Although if you're prepared to cut out part of the map then you have a lot more freedom in your choice. Edit: Just discovered that if you prefer a conformal map instead of one with equal area then you end up with the Mercator projection.

by castell 11y ago

anc84 11y ago

Robinson or Winkel-tripel like National Geographic does.

coldpie 11y ago
Hammer retroazimuthal, back hemisphere. Which is, coincidentally, also my favorite skateboarding move.
- HCIdivision17 11y ago
  This is really cool looking, and I have no idea what you'd use it for. And this is just the neatest thing to play with: https://www.jasondavies.com/maps/hammer-retroazimuthal/ https://www.jasondavies.com/maps/hammer-retroazimuthal/
  - fennecfoxen 11y ago
    "As a retroazimuthal projection, azimuths (directions) are correct from any point to the designated center point." (-- Wikipedia, which knows everything and is never wrong.) It looks like one retroazimuthal variant (the Craig retroazimuthal) is sometimes called the "Mecca projection", so you know which way to kneel at sundown if you're into that sort of thing.
- fennecfoxen 11y ago
  Okay, hipster. Transverse Mercator, south-oriented. https://trac.osgeo.org/proj/wiki/TMSO https://trac.osgeo.org/proj/wiki/TMSO

sesqu 11y ago

Azimuthal equidistant on my house.

logfromblammo 11y ago

If you have to do it yourself anyway, why not make your own projection? I'd do a Dymaxion-style projection onto a truncated icosahedron (Goldberg polyhedron G(1,1), a.k.a. the soccer ball shape), with the poles centered in two of the pentagons, and as many edges as possible over bodies of water. Then I'd print each tile image and plaster it to its own mounting board, trimming the backs of the board edges to 69 degrees on all the hexagons and 73.5 degrees on all the pentagons. At that point, I'd permanently join the tiles with appropriate amounts of contiguous land mass, using brackets, and attach magnets to the remaining edges in such a way that you could assemble them like a puzzle. I'd rather have a gigantic globe (that can also be dismantled for moving or storage) than have a wall map.

contravariant 11y ago

Well, if you want something rectangular, preserving area, with vertical meridians then you automatically end up with a cylindrical area projection. If you want an aspect ratio of 3/2 (approximately) you end up with the Gall-Peters projection. Although if you're prepared to cut out part of the map then you have a lot more freedom in your choice. Edit: Just discovered that if you prefer a conformal map instead of one with equal area then you end up with the Mercator projection.