topic Custom Projections in AGOL in ArcGIS Online Questions

Custom Projections in AGOL

AnnaScholl — Mon, 04 Jan 2021 20:19:47 GMT

Dear friends,

It seems this has been asked before but the answers didn't quite give me the info I'm looking for. I have a custom projection for India (transverse mercator) for a school project in Pro. We are now making a dashboard and need to transition to AGOL. Web Mercator is, of course, completely inappropriate for most maps, and I need to change the projection. The question is, how? All of our data is in this custom projection, so this shouldn't be a problem. If the answer involves Arcgis REST, how do I go about publishing my own service?

Many thanks,

Re: Custom Projections in AGOL

Anonymous User — Mon, 04 Jan 2021 20:59:37 GMT

Hi Lydia, check out the "How to Make Non-Mercator Web Maps" section in the following article: https://www.esri.com/arcgis-blog/products/arcgis-online/mapping/here-are-some-equal-area-projected-maps-for-arcgis-online-and-how-to-make-them/

Hopefully this helps!

Re: Custom Projections in AGOL

Anonymous User — Tue, 05 Jan 2021 06:11:29 GMT

Hi Lydia,

In addition to Cartochien's advice, if you still have ArcGIS Pro you can change the projection using these steps:

you can then you can publish the layer to AGOL

Open the map in AGOL through your contents
share as a web app
choose the dashboard option

Hope this helps

Re: Custom Projections in AGOL

AnnaScholl — Tue, 05 Jan 2021 08:07:16 GMT

Thanks! Unfortunately, when I go to publish the layer to AGOL, it gives me an error that the basemap (e.g. Topographic) is in a different projection than the other layers (my custom projection). I haven't been able to figure out how to get through this step.

Re: Custom Projections in AGOL

AnnaScholl — Tue, 05 Jan 2021 08:12:19 GMT

This would be great, and seems straightforward, but I can't figure out how he starts out... "choose a projection that suits you." This I have, but how did he get the landmass data, water data, etc? Where could I find this?

Re: Custom Projections in AGOL

AnnaScholl — Tue, 05 Jan 2021 13:10:44 GMT

Hi all! Got a solution: https://learn.arcgis.com/en/projects/design-and-publish-basemaps/

thanks 😄