Authagraph projection

jbclaypool

Anyone know of a website which can convert other projections to authagraph?

Loopysue

Do you mean orthographic?

If you are starting with an equirectangular world map you could try NASA's G.Projector, but right at the moment I can't seem to get the page to open. Maybe their server is down. You should be able to find it close to the top of the result page if you Google "map projection converter".

jslayton

https://github.com/jkunimune/Map-Projections is suggested to be able to produce something very similar to the authagraph. It's not web-based, however. That's based on https://blog.map-projections.net/an-equal-area-projection-in-the-fashion-of-the-authagraph-map#upd20180627 and it's a bit old as far as articles go.

I wasn't able to find any formulae for the projection, meaning that I won't be implementing that one any time soon.

It looks to be one of those novelty projections like the dymaxion that's heavily optimized for a subjective "goodness of appearance" metric that only fits a specific configuration of continents and is pretty bad for virtually all others.

The general process would be to go from your current projection to plate carree (equirectangular) and then feed that to some forward projection software. There do tend to be distortions when converting images like this, though, especially for maps with extreme singularities like the authagraph.