Access to nature was something I sort of subconsciously selected for when I moved a few years back to be closer to the kids. It got me curious how close my situation was to the idealized standard in the post and I have to say, I think they nailed it.
I'm a little lucky to have found a house that borders a large therapeutic horse riding center so looking out my back windows (chain link fence on the back so minimal obstruction) I am looking straight into a small forest. That aside, my own property has 3 trees between 25' - 60` tall out front and out back there's an 80' tall sweet gum tree (it's lucky I value it's existence slightly more than I loathe the 6 billion stupid spike balls out drops for me every year) an 80' (I believe) maple, and a useless 95' Pine tree that the squirrels are slowly De-Branching).
It's a small property in the suburbs so those trees give me well over 30% coverage so I've got 2/3.
Quick check on Google maps and unfortunately I'm 483 meters away from my neighborhood park so I missed the mark there. But I think having 3-4 large parks all connected by 15+miles of hiking trails, a botanical garden, and an arboretum within a 5 mile radius more than makes up for that extra 183 meters.
Having spent the last 3+ years living with this level of access to nature spaces, it's become the bare minimum I expect from wherever I move in the future. And if I'm honest, I'll likely not be happy with anything less than being able to see more nature than society when I step out of the house..