Experimental projections

[Atarimaster]

… and Tissot’s indicatrix:

tissot15x.png (37.02 KiB) Viewed 4356 times

[daan]

I like it! It pushes distortion into north and south Pacific and central Atlantic.

My guess is a Wagner + Guyou?

I’ve done a lot of these over the years, but I think yours is a little more successful than mine. Mostly I was going for novelty, such as the britches projection:

Blending what…?

Jeans.jpg (92.17 KiB) Viewed 4356 times

— daan

[Atarimaster]

I like it! It pushes distortion into north and south Pacific and central Atlantic.

Yes, I was really surprised how well it turned out. (New Zealanders might like very much! )

My guess is a Wagner + Guyou?

Exactly! Guyou and Wagner VII to be precise (with P = 0.6 in favor of Wagner). I was curious to find out how a blend of a conformal and an equivalent projection might look.

Mostly I was going for novelty, such as the britches projection

That one surely looks very unusual!
One of the blended projections is easy, Sinu-Mollweide. The other one’s gotta be a cylindrical projection with heavy areal distortion – Web Maps Mercator, maybe?

Did you ever try to sell this to a jeans manufacturer as emblem for a marketing campaign?

[daan]

One of the blended projections is easy, Sinu-Mollweide. The other one’s gotta be a cylindrical projection with heavy areal distortion – Web Maps Mercator, maybe

Not a bad guess, although an unbounded projection wouldn’t work here. It’s Adams World in a Square I.

Did you ever try to sell this to a jeans manufacturer as emblem for a marketing campaign?

Sadly, my dreams of parlaying this projection into a retirement bonanza have been dashed by the puzzling unresponsiveness of my industry contacts.

— daan

[Luca_bat_map]

Hi all!

Talking about experiments... what do you think about this one? It's the merge (as usual... graphic work...) of four conformal conic projection. It's a similar arrangment to the Cahill-Keyes one but it's conformal (more or less... I cannot guarantee since I used graphic manipulation...) and the area error on land masses is very low! Even lower than my "bat" projection (or Cahill conformal map). Compared to that this one have north pole splitted but south pole in just one right-size piece!

bird projection - 800.jpg (262.98 KiB) Viewed 4315 times

Sorry for the low resolution but it's the maximum wide to upload image directly here...

Luca

[Atarimaster]

Talking about experiments... what do you think about this one?

Looks very nice, great work!

Personally, I’d probably prefer to use the variant without the repeated (darker) parts of the map.
(Although I did ask for supporting repetitions in Geocart a while back, I usually prefer maps that don’t repeat certain portions.)

Kind regards,
Tobias

[Luca_bat_map]

Personally, I’d probably prefer to use the variant without the repeated (darker) parts of the map.
s

Yeah me too, that's why I still like more the maps where northern emisphere is kept in one piece: it's the only way to keep Eurasia united without heavily affecting the overall symmetry (more or less)... Thanks for the appreciation!

[Piotr]

Another experimental projection has been brought up in https://mapthematics.com/forums/viewtop ... 2215#p2215 . It involves taking the center hemisphere in the transverse Dietrich-Kitada projection, then doing Longitude Mix by a factor of 0.5 then stretching horizontally by a factor of 2. It has been noted that the middle part of the projection resembles a cylindrical projection.

[Piotr]

The rectangular experimental map projection



Another map thing

[Piotr]

Making Azimuthal Equidistant into a Longitude Mix by a factor of 2 (not 0.5) and then stretching horizontally by 0.5 (not 2), the result is a hemispheric map.