The photos of where I live are 5 years old. There is a shopping center that is just being built in the photos that's been there a long time. There are clouds in a lot of the areas outside the US. (weather satellites?) Here I think they use US topo maps that are shot from aircraft every few years. I could be wrong but that's about the resolution for topo maps.
Anyway what will they think of next. It's neat to check out all the places where you have been and are going.