Being able to view public imagery directly in ESdat has always been hampered by the lack of free imagery that can legally be viewed through independent GIS systems. Many large companies have large libraries of GIS imagery, so this isn’t a problem for them, however, many don’t.
BING Maps is now able to be viewed directly through ESdat relatively cheaply ($60/year is the price we have been given).
To do this first visit http://register.onterrasystems.com/wms.aspx and register in order to obtain a token.
Then in ESdat view the GIS and make sure your data has a co-ordinate system specified; it is indicated on the bottom left of the map. Any value other than “Unknown” will work. If you don’t know how to specify a co-ordinate system see the “Further Functional Tutorial - Mapping” Tutorial at http://www.esdat.net/esdathelp/index.html?tutorials.htm
More information and images http://esdat.net/BING_Maps_ESdat.aspx