You’re only supposed to use slabs (plates) if they were pre-made. If it was poured (whether in one batch or multiple), the wiki says it should be just “concrete”.

https://wiki.openstreetmap.org/wiki/Key:surface :

concrete: Portland cement concrete, forming a large surface, typically cast in place and may have predetermined breaking joints. For pre-fabricated plates, please use concrete:plates or concrete:lanes if you know how the concrete is laid out and one of these tags fits.

edit: Tbh most people probably don’t realize this, I probably mistagged some myself. I assume even advanced software would treat “concrete” and “concrete:plates” equally, perhaps giving some special treatment for “concrete:lanes”.

6.6% of trees have the species tag filled out! That’s much more than I expected!

In C an assignment is an expression where the value is the new value of what was being assigned to.

In a = b = 1, both a and b will be 1.

a = *(p = p + 1)

is the same as

p += 1
a = *p

, so ++p.

Perhaps *(p += 1) will be to your liking?

I took it as a chance to weed them out. I went through each one manually and made a choice whether to keep it. Went from ~260 to 130.

I also unsubbed from each so as to make yt unusable, so I wouldn’t be tempted to go there, unless specifically looking for something.