Adding Map Tiles to ArcGIS online

Just some helpful links (unsorted):

http://blogs.esri.com/esri/arcgis/2013/03/21/adding-tile-layers-to-your-web-map/

http://jonahsmaps.tumblr.com/post/63650958094/customized-basemaps-and-layers-in-arcgis-online

http://blogs.esri.com/esri/arcgis/2013/04/01/using-stamen-and-mapbox-tilesets-as-basemaps-in-arcgis-com/

http://thunderforest.com/

http://wiki.openstreetmap.org/wiki/Tiles

http://maps.stamen.com/#watercolor/12/37.7706/-122.3782

• http://{subDomain}.tile.opencyclemap.org/cycle/{level}/{col}/{row}.png
• http:/{subdomain}tile.stamen.com/watercolor/{level}/{col}/{row}.jpg
• http:/{subdomain}tile.stamen.com/toner/{level}/{col}/{row}.png

http://www.arcgis.com/home/group.html?owner=cartogeek&title=Stamen%20basemaps

http://www.nps.gov/npmap/blog/using-park-tiles-in-arcgis-online.html