I don't know if "most" is totally accurate, but definitely the highest resolution ones and probably the most recent ones. Probably anything less than 1m. There

I don't know if "most" is totally accurate, but definitely the highest resolution ones and probably the most recent ones. Probably anything less than 1m. There is a significant discrepancy between the imagery viewable in 3D mode and the stuff that's only 2D, because Google simultaneously captures high resolution aerial photography and Lidar, particularly around cities. You can see vast differences in urban or rural landscape sometimes because the stuff you see in Google maps can be taken as far as years apart from the 3D aerial stuff. For example, you can see where the data source and rendering method change just outside the city of Winnipeg on the South end. Probably testable in many other cities simply by seitching between google maps and google earth.