What coordinate system is ArcGIS online using for data exports?

[Katie_Macintyre_Atmos]

When exporting data to a CSV from the table widget in experience builder, X and Y columns are added but the coordinates look to be nonsense. What coordinate system is this? It doesn't look to be standard WGS84 or Web Mercator. The actual location of the points is in the UK and they display in the correct location both on the experience builder webmap, and when I bring the layer into ArcPro.

x	y
-515889	7718968
-515721	7718480
-515797	7717138
-514981	7719600
-515037	7719787

[JeffreyThompson2]

The units are based on the coordinate system of the basemap. There are many different national/regional coordinate systems in the world that are more accurate than the global systems for the regions they were made for. Based on the size of the numbers, that looks like UTM. You will need to find your UTM zone to potentially make them meaningful.

[Katie_Macintyre_Atmos]

I thought UTM too but they still don't make sense, we're in zone 30. The basemap is WGS84 so I was expecting them to be lat/long. 

[Marc_Patti]

Did you ever find out what the issue was on this? I'm also looking to have our CSVs export in standard WGS84 but can't find any settings that would change the output coordinate format. 

[grahamsy2k]

It might be in meters for Web Mercator. You can check by changing a map projection in Pro to Web Mercator and then changing the coordinates that display at the bottom of the map to meters or use the Go to XY tool and setting the measurement to meters. Looks like those coordinates fall somewhere in Scotland?