Yep, Fatman. Futhermore, a box of cornflakes once gone is gone....

Yep, Fatman. Futhermore, a box of cornflakes once gone is gone. The photos can be accessed indefinitely. The difference is like that between a synchronic study and a diachronic study. If you want to install solar panels, present data is all you need. If however you want to know about, say, the effect of a housing development, new road, mine, even a changing climate, etc etc on an area them you need diachronic, that is, longitudinal data - the more the better. Have there been weed invasions, are there more or less trees, what about overshadowing, and so on. These are processes, not frozen moments, and are ideal for people such as planners. Nearmap sells both.