[john70t]

(may be wrong but)

I thought:
1). Sativa (i.e. Mexican dirt weed)
Looks more like hemp. Grows tall like grass fields. Smaller flower/buds. Less THC. Not desired.
Grown in southern areas where it is dry and hot.

2). Indica (commercially sold pot)
Shorter plant, spreads out and needs room, has easily identifiable large flowers/buds. More THC.
Grown in the north where damp and cold.


The fall is when government surveillance planes do their thing.
The commercial pot farms are easy to spot because of extra heat signature and the grow leaves have dropped leaving the curing buds behind.
I'm quite sure there is plenty of sophisticated photo-analytical software designed to identify plants from the air.