Is it prohibited to use knowledge you get from proprietary images or videos? Example: I found a geotagged photo (ponramio) in Google Earth with a well on it. So I know: "Ah, there is a well where I can get water!". Can I use that knowledge to mark that well on my map? ...
I'm no lawyer, but unless your usage of the information falls under fair use (the definition of which varies by country), you need to get permission from the copyright holder. The Panoramio TOS (Terms of Service) redirects to the Google TOS, which state:
Additionally the Panoramio help section on copyright has the following information: