Add USGS Topos to basemap gallery

[TedChapin]

I would like to add the USGS Topo cached service to the basemap gallery.  I know the URL:
http://services.arcgisonline.com/ArcGIS/rest/services/USA_Topo_Maps/MapServer

Is there a config file that lists all the online basemaps?  I don't want it to be the basemap at startup, I just want it to be available to users to switch to.

[AnthonyGiles · Accepted solution]

Sarah,

I just search for the service in arcgis online:

http://www.arcgis.com/home/search.html?q=Topo&t=content

Then go to the service details and copy the image by right clicking it.

Regards

Anthony

[Anonymous User]

Thank you Anthony!