Compare Map Projections

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2 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   –    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
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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   –    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
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