Compare Map Projections

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6 comments

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Andreas Skyman

I think this might be my new favourite site on the internet. Wow! Everything I've been wanting to explore about projections at my fingertips! The _only_ drawback is that now that I've found this site, I won't feel so compelled to implement/write my own version of it, but hopefully I will find something else to do with my time. Thank you very much!
Wed Nov 16, 2016 6:24 pm CET   –    One Reply

Tobias Jung

Thank you very much for your kind words! :-)
Hope you keep enjoying the site, and whenever you’ve got any suggestions, feel free to contact me!
Thu Nov 17, 2016 11:12 am CET
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HumanImprint

Can you look at Wagner II? It says the date was made after Wagner I, but also after Wagner III.
Wed Aug 09, 2017 6:40 pm CEST   –    One Reply

Tobias Jung

Thank you for your comment!

Yes, that’s confusing, but these dates are correct.
Wagner published the projections that are nowadays (he himself didn’t use those numbers) called Wagner I and Wagner III in a paper that was published in 1932. Then, in 1949, he published the book »Kartographische Netzentwürfe«, in which he again presented some of the projections he had developed earlier, along with some new ones.
The ordinal numbers were added later (to my knowledge, by John P. Snyder), using the order in which they are shown in the 1949 book.
And since Wagner went from the equal-area projection, to the projection with some amount of areal distortion, to the one with equally spaced parallels, they are now called Wagner I, II, and III, although they were originally published in a different chronological order.
Wed Aug 09, 2017 7:13 pm CEST
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Nathan

have you heard of the waterman butterfly projection?
Mon Aug 28, 2017 11:30 pm CEST   –    One Reply

Tobias Jung

Oooops! Somehow, I missed to reply… Sorry!
Yes, I know the Waterman butterfly, and I’d love to add it to the website, but no software that I use is able to generate it. Thus, I can’t create the images that I use for all the other projections.
At some point in the future, I’m going to add a post to the blog, listing »the missing projections« that I’m not showing yet for this reasons. It’ll include the Waterman as well as the Dymaxion, Cahill-Keyes, Authagraph…
Mon Nov 13, 2017 12:12 pm CET
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Peter Weenink

Hi, Tobias,
Thanks for your informative projection website! I'm working on Mapvision, a GEO-portal with international info about carto/geo/topo/hydrography, and much more global geo-related info. Sometime this year I will put a link to your site at: http://www.mapvision.eu/node/m…
Best regards, Peter.
Wed Sep 13, 2017 6:43 pm CEST
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Roland

Great job! Extremely useful, intuitive website, for research, education, or simply enjoying free time!
Wed Oct 11, 2017 10:53 am CEST
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Robin

The projection you call "Hammer-Cylindrical" is obviously not cylindrical. Some info on the source/derivation would be useful.

In that vein... This is a very useful website, but from a professional standpoint, it would help if there more citations to sources, esp. for some of the more esoteric projections.
Mon Nov 13, 2017 6:54 am CET   –    One Reply

Tobias Jung

The Hammer-Cylindrical is a mix of the Hammer and the cylindrical equal-area projections.
It was made using Flex Projector, I grabbed it from the gallery of that application:
http://flexprojector.com/galle…
I don’t know how it was mixed exactly, since FP offers a few options.

About the sources and citations: Good point!
I’m going to add more information, but I’ll do it bit by bit as time goes by.

Thank you for you comment and suggestion!
Mon Nov 13, 2017 12:04 pm CET
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