I'm sorry, but in this particular case, I think Frontier "Screwed the Pooch".
In Horizons, you would scan a planet and would be shown that Bio & Geo indications were located at IDENTIFIED Locations.
You could land, drive the SRV to the site and use the SRV Scanner on the item.
Now you get the 'Oh they're somewhere in that 20 Sq Km blue area.
Then they saddled us with an extremely Primitive Sampling device (at least they got rid of the stupid sampling game), that "EVEN THO"
it has a detachable Sample Cannister, it's incapable of being able to remove a canister with 1-2 samples of a particular item, and attaching a new one.
Frontier has Prided itself on making the gameplay as realistic as possible, but there's no realism here. In a Reality Situation, you wouldn't be passing up all sorts of New things because you're still looking for more of the old one. Correction! A Different Kind of the old one. No. You would be able to swap sample containers. I'm currently on a tiny moon with 6 Biologicals. I've been driving around for over an hour, and have passed 4 NEW type Bio's, but I can't sample those because I'm STILL trying to find 2 more of the 1st Bio I sampled. I've even launched and landed in a new location and have still not been able to get Sample #2!
I HAVE came across new colonies, but they're the same as the 1st, so I can't take a sample. Oh yes. 90% of this tiny moon is blue.
So until they upgrade our Sampling device to be smart enuf to be able to swap canisters so multiple items can be sampled, I'm going to stop frustrating myself by
the pattern of Drive, dismount, scan, mount and drive again.
Maybe the Devs can tell me why they had to Screw Up a perfectly good system.
Or is it that we're supposed to spend hours driving around. This is worse that landing on a Metal Rich Planet that's "100% Metal", then driving for several minutes without
seeing anything on the scanner!
I have 2402.8 hrs in Elite and it's been one of my favorites. Still hoping to one day land on an "Earth-Type World".