Adding Image Layer as Basemap Problems

[TonyThatcher]

Hello.  I'm running into problems adding an image layer (raster catalog) from a Map Server service as a BaseMap layer.  I get the following error.

"Layers added as Basemaps must be MapServer or ImageServer ArcGIS Server Web Services"

All feature layers from this service work fine.  Does ArgGIS Online not support raster catalogs?  Here's the url for the image layer.

http://gisportal.msl.mt.gov/arcgis/rest/services/application/Yellowstone_Hydrology/MapServer/54

Thanks!

-Tony

[MikeMinami]

You can't add an individual sub-layer inside of a map service. You can only add the whole thing. So the URL you need to specify should be this: (basically remove the "/54" from your URL).

gisportal.msl.mt.gov/arcgis/rest/services/application/Yellowstone_Hydrology/MapServer

Thanks,

Mike