According to Google's guidelines https://www.google.com/intl/en-GB_ALL/permissions/geoguidelines/ https://www.google.com/intl/en-GB_ALL/permissions/geoguideli.

According to Google's guidelines https://www.google.com/intl/en-GB_ALL/permissions/geoguidelines/ https://www.google.com/intl/en-GB_ALL/permissions/geoguideli... I interept it as "for non-commercial usage, give attribution to us and you're fine". I don't think Jon has given enough attribution though since some of the images do not have google watermark/copyright symbol (cropped?)