Perhaps related to Google's Map Engine tools? It appears to be a layer on top of the base map, though maybe it was part of their Partner Program: http://maps.go

Perhaps related to Google's Map Engine tools? It appears to be a layer on top of the base map, though maybe it was part of their Partner Program: http://maps.google.com/help/maps/mapcontent/basemap/index.html http://maps.google.com/help/maps/mapcontent/basemap/index.ht...