topic Re: When will the AuthaGraph projection be supported by ArcGIS? in Coordinate Reference Systems Questions

When will the AuthaGraph projection be supported by ArcGIS?

emmornile1 — Mon, 14 Oct 2019 18:10:46 GMT

It would be nice to be able to use the AuthaGraph projection (AuthaGraph projection - Wikipedia) in ArcGIS. Is adding this in the production plan?

Re: When will the AuthaGraph projection be supported by ArcGIS?

ColinKelly — Mon, 14 Oct 2019 18:40:35 GMT

emmor nile‌ This would be a perfect question to post in the Ideas section of GeoNet rather than simply asking the question generically as the coordinate system is not yet implemented. Posting this to the Ideas page would allow others to upvote the idea to help it gain traction for the Development team to see and potentially implement it in a future version of the software.

Re: When will the AuthaGraph projection be supported by ArcGIS?

RobertBorchert — Mon, 14 Oct 2019 18:56:00 GMT

Probably never as the AuthaGraph, while significantly more accurate for projecting size and shape, would be very difficult to make useful in a GIS environment. It cannot even be used for navigation. And I could not imagine making it work with modern GPS.

It is neat, it is revolutionary, it is art.

Re: When will the AuthaGraph projection be supported by ArcGIS?

emmornile1 — Mon, 14 Oct 2019 20:57:15 GMT

Thanks, I have to say that the whole esri community site is baffling to navigate.

Re: When will the AuthaGraph projection be supported by ArcGIS?

MelitaKennedy — Tue, 15 Oct 2019 19:32:34 GMT

Hi Emmor,

There are no equations available for it publicly, and I suspect that there could be copyright, trademark, or patent issues.

It's sphere-based only which is not ideal and there are some significant shape distortions in certain areas (Brazil and Australia).

Melita

Re: When will the AuthaGraph projection be supported by ArcGIS?

emmornile1 — Fri, 25 Oct 2019 17:34:12 GMT

Thanks Melita, good to hear from you again. I agree with the distortions you mention, but the ability to tessellate seems handy. Obviously it wouldn't work for navigation or as a mobile basemap, but for illustrations this view of the world could tell a good story. Too bad if the equations aren't made public.

Re: When will the AuthaGraph projection be supported by ArcGIS?

RobertBorchert — Tue, 29 Oct 2019 16:13:40 GMT

Could you detail how it would be handy?

Maybe for students or people with a GISP and to get peoples attention.

Re: When will the AuthaGraph projection be supported by ArcGIS?

MelitaKennedy — Wed, 30 Oct 2019 22:01:27 GMT

Okay, so we don't let you actually tessellate because of data duplication, but the Peirce Quincuncial can be tessellated. It was added in 10.7 / Pro 2.3 or 2.4. Upcoming in 10.8 and Pro 2.5 is Adams in a Square II, which can also be tessellated.

Melita