Is it possible to define a custom projection for use in an ArcGIS Online app. (Similar to this on ArGIS Server: Defining a custom projection for a WMS service—Documentation | ArcGIS Enterprise )
WKID 27500 is close to my projection but I need to modify it slightly.
Hi Weldon Hoppe ,
I guess it is possible to publish your data using a different coordinate system. You will need your own basemap to me able to display the data. Choose basemap—ArcGIS Online Help | Documentation
I would be careful with going that way, it might be better to project the data to a known and supported coordinate system to avoid incompatibility later on and being able to combine it with other data in an easy way.
I am publishing in a standard coordinate system. However, I would like to use the Coordinate widget to allow the user to display coordinates in a custom system. I am limited to selecting a WKID for the alternate system(s). Is it possible to add a WKID for the custom system to my online project?
thank you,
Weldon
I don't think so. The whole idea of a WKID is that it is "well-known" and when you create a custom projection it will not be well-known.
I understand your point of WKID, however, based on the reference to "Defining a custom projection for a WMS service" in my orignal post, I was just wondering if there is a way to submit a custom definition in WKT format in Online that is only used for my project.
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