Comment Re:Someone's going to complain (Score 5, Informative) 208
FYI, this came up many years ago in the US. Defendants challenged the admissibility of evidence from aerial observations. The courts pretty much held that since the police are allowed to fly helicopters and airplanes over your house, anything that they observe while doing so is admissible under the 4th Amendment.
The basic rule for criminal evidence is that the cops can make observations from anyplace they're allowed to be. If they're standing on a sidewalk and see a marijuana plant in your front window, that's probable cause. Same if they walk up to your front door. They can look around any non-fenced areas on your property too. They can't stand in the bushes and peek through your windows, unless they have some other business being there (hint: do not have a burglar alarm if you're growing weed anywhere someone can see it through a window).
So if the cops can see your mj plants (or pool) from the air or some unfenced part of your yard, you're toast.
The rules for adminsitrative searches (e.g. code enforcement or tax enforcement) are much more lenient than criminal searches. Administrative searches often don't require a warrant, or if they do the warrants are much easier to obtain.