Ordering of layers

[DavidLudder]

I am building an ArcGIS online map showing RSEI facilities and Census Block Groups. Both appear to be map layers (the RSEI facilities layer does not seem to be a feature layer). I can't get the RSEI facilities layer to layer above the census layer so that the RSEI facilities show on top of the census layer. I can't move the RSEI layer above the census layer. And, I can't move the census layer to basemap. Any suggestions?

[DavidPike]

Is the RSEI layer a Map Service?  Do you have the URL?

Map Services can't sit above Feature Services I don't think (for whatever Esrieason).

If you can specify the feature by REST endpoint index 'ServiceName/MapServer/0' instead, then it acts as a feature layer which you can then put on top.

[DavidLudder]

David,

Thank you for your reply.  I am an amateur at GIS mapping so don't know if or how I could "specify the feature by REST endpoint index 'ServiceName/MapServer/0' instead."  My developing map can be viewed at https://arcg.is/TaqLn0.  I am trying to get the RSEI "Map Image Layer" to show on top of the USA Census Redistricting Block/Block Group "Feature Layers." 

The RSEI Map Image Layer is from https://www.arcgis.com/home/item.html?id=c87458d1dfaf4885846f1d4a9938fc05and hazard - Overview (arcg...

The Census Feature Layer is from https://www.arcgis.com/home/item.html?id=d1105f1e65a743cc84fc12c034625fc7

I understand that feature layers are designed to show on top of map image layers. In this case I want the reverse or to modify the layers to accomplish the same result.

[DavidPike]

Ok I've tested this and it works.

In your Web Map, 'Add Layer from Web', add the following layers individually then reorder them as needed.

https://geopub.epa.gov/arcgis/rest/services/EMEF/rsei_2018/MapServer/0

https://geopub.epa.gov/arcgis/rest/services/EMEF/rsei_2018/MapServer/1

https://geopub.epa.gov/arcgis/rest/services/EMEF/rsei_2018/MapServer/2