I can obviously see the ore spots themselves, but the edges aren't visible very well as the groundcover covers up most of it.
So for trying to cram as many miners on the ore spot as possible, it's annoying to have to switch to the map back and forth to figure out where the ore spots are.
See the red circle? Ore right there! Didn't see it at first glance.

For oil, it sometimes makes the resource spots nearly invisble; it took me a while before I found this one:

I'm aware I can turn off decoratives in my settings; if permanently, this makes the world look very empty, if temporary, I'd have to switch it off every time I want to work on ore spots (which is annoying.
I don't recall having this issue in earlier versions, so is this something that's changed in one of the later experimental versions?