Feature service layer vs Web Map Publishing

[tmo]

I initially published my data as a feature service layer so that symbology configurations would stay intact when publishing data.

After publishing my feature service layer, I grouped my data layers (tedious) for easier viewing. Then pushed it as a web map which contained said groupings.

Then housed under the new Experience App (preserves symbology > Web App Builder).

Upon subsequent data feature service layer overwrites I realized groups are not preserved (I do not want to build groups upon each subsequent data update and overwrite).

With that, I grouped my data layers in ArcPro (tedious). Then realized after the publishing analysis function that 'groups' are not preserved from Pro to ARCGOL (as a feature service layer), but web maps do preserve groups.

Decided to skip the feature service layer and publish as a web map.  Web map requires I include a base map. Base map included, but now stating the service layer has a different projection than the maps projection. Do the auto fix and now my web map/basemap match and are in WGS 84. However my data layers are in NAD 83 State Plane California V FIPS 0405 (US Feet).

So with discovering what works and what I can and cannot do I will publish my web map with said grouped data layers. The web map is in WGS 84 and data layers all in the LA County specific projection California V FIPS 0405. Is this difference going to be a problem, or do I need to put these layers in WGS 84? 

All this runaround because I wanted to create groups and preserve symbology.

[RussRoberts]

We just released the Group layer item: https://www.esri.com/arcgis-blog/products/arcgis-online/mapping/group-layer-items-a-new-way-to-bring...

If you can use Map Viewer you can group all your layers and save them off as a group layer item and bring them into new maps/apps. 

[JuanManuelCruzHerrera]

maravilloso

[tmo]

Great, thank you for the response.

With that in mind, if I were to have this separate grouped item of my data layers, when I overwrite the data will the grouping/popup formatting stay the same?

This has been my concern, one-organizing the data into  groups and then, two- avoiding the tediousness of reformatting/grouping said data once it is overwritten/updated to ArcGOL.

[RussRoberts]

It depends on where the operational layer is info is stored. If the operational items have their popups etc saved back to their own individual item and then you create a Group layer item the info will just be at the operational layer item level. You could overwrite the operational layer item info if you do not do a save/save as on the sub layers but only do a Save/Save As on the Group Layer item. This would be similar to web map saving.