How Effective Are Helicopters At Searching For Weed?

ok so i was chillen at my buddies place accouple nights ago, he lives about 15 minutes north of me and at about 9 oclock we staarted hearing helicopter noises, turns out there were about 6 helicopters out searching feilds in that area, looking for dope.

and today at my local hydro store he said the cops were out early this year.

i have 7 plants ranging from 5 to 7 feet that are eclosed in a complete circle of pine tress on the edge of the forest, the opening is roughly 25 square feet, with pine trees that are about 15 - 20 feet tall.

my question is if the police are flying over my house in their copters how easily will they be able to find a grow of that size, do the use special cameras that show the weed and how effective are those?

6 Helicopters flying above one specific field looking for a grow op is very unlikely. It's more likely they were looking for a fugitive as the costs and available resources to enforce laws via Helicopters are astronomical.
Sure they will be out looking, but if you are gauging your grow due to this assumption, I say you're just being paranoid.

You seem to have been diligent when it came to location. And, as well all know; Location is everything.

Good luck!

no it was 6 helicopters spread out across the county , this seems like alot to me too and i thought the must be looking for something else but, theres not alot of shit going on in my area like the only illegal shit is weed and theres alot of it especially in the country they were searching, my county isnt as heat but im just abit concerned because last year a person had a 50plant grow op just down the road that the cops found out about but they were too late, so im worried that the grow from last year might bring some unwanted attention from popo and helicopters