3097c0a6_ey_source___OpenStreetMap_Wiki__Meaning
[Value] Bing 2012 [Country(ies)] worldwide [Meaning] 
Tracing of the current version (since Summer 2012) of Microsoft's map service Bing's aerial imagery (but not their actual maps). Note that it is still 2012 and not 2013 because of the age of the images.
Key:source - OpenStreetMap Wiki