Probably depends on the density both of the canopy and underneath. A look at the aerial photo shows not too many individual trees stand out.
I don't envy you the job.
The aerials are deceptive. On the ground, the individual trees all stand out since there is absolutely no undergrowth and they are all mature tall trees with a high canopy so all you see are the trunks unless you look up. That's what makes it so tough. I'm sure there will lots of complaints about my mapping.
My call would be open/scattered trees if the canopy is close to other trees, and only individual in the most obvious cases. Better that than overlapping green circles.