this post was submitted on 15 Oct 2024
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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 :
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".
Unless I see them being constructed, how would I know?
@pineapplelover @Tyoda @openstreetmap
The ones on the wiki have visible lifting points.
They might also have visible alignment issues or evidence of moulding at the seam or corners.
So a concrete sidewalk would mean the entire sidewalk was poured in one piece? No moulding or anything?
@pineapplelover @openstreetmap
They would usually be poured in one or two slabs with the joints added to the wet concrete or cut later.
If it looks like an impossible mould would me needed it's more likely to be pre-fab and lifted into place later.
This thread says concrete means the entire thing was poured in one piece, no lines
https://help.openstreetmap.org/questions/85524/concrete-vs-concreteplates
@pineapplelover @openstreetmap
That thread has a top answer with a grand total of one vote on it, I wouldn't take it as consensus on anything.
Concrete that is poured in one piece usually has visible lines. They're placed there after the fact or when the concrete is wet to control how it cracks as it settles. That doesn't mean it's separate plates. The cuts normally aren't full depth.
The wiki seems to have good information also
https://wiki.openstreetmap.org/wiki/Key:surface