Feedback
For comments, questions, suggestions and criticism of any kind, write an email to:
… OR:
Leave a comment on this site
Some pages (e.g. the articles about Basic Knowledge or Selected Projections)
offer a commentary function for comments regarding the subject in question.
For general comments regarding the website map-projections.net, use the comment form below:
Comments
9 comments
There are further comments in the german version.
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
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.
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
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…
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
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.
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
Roland
Great job! Extremely useful, intuitive website, for research, education, or simply enjoying free time!
Wed Oct 11, 2017 10:53 am CEST
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.
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!
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
Clinton
Hi Tobias
Great website! Quick question... what is meant by 'compromise', under the property column - for some projections?
Thanks
Great website! Quick question... what is meant by 'compromise', under the property column - for some projections?
Thanks
Wed Aug 14, 2019 5:41 pm CEST – One Reply
Tobias Jung
Hello,
thank you! :-)
Quick answer: The term „compromise“ refers to projection that is neither equal-area, nor conformal or equidistant.
For more information about these properties, see:
https://map-projections.net/pr…
Hope this helps!
thank you! :-)
Quick answer: The term „compromise“ refers to projection that is neither equal-area, nor conformal or equidistant.
For more information about these properties, see:
https://map-projections.net/pr…
Hope this helps!
Wed Aug 14, 2019 6:08 pm CEST
Rick
Fantastic project! Very professional and well executed. Keep up the good work. Sehr gut und mit Belehrung gelesen!
Mon Mar 16, 2020 5:32 am CET
Liam
Except, the surface of the world is not spherical or even convex in the slightest. There is no measurable curve at all. Also,the world is stationary and does not move at all. It is the Sun etc that moves in the sky above the stationary world below. https://ibb.co/7W3sSZS https://ibb.co/w79B7b2 https://ibb.co/j6FZqcb
Sun July 19, 2020 8:41 am CEST – One Reply
Tobias Jung
Feel free to believe that.
Sun July 19, 2020 1:43 pm CEST
Tobias Jung
Hope you keep enjoying the site, and whenever you’ve got any suggestions, feel free to contact me!