@vectorial8192 dum dum you didn't understand the meaning of the "surface" tag.

In the context of sport pitches, `surface` is describing the material that is used to pave the ground of the pitch. Examples could be plastic, or natural grass, etc.

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This "false positive" note from StreetComplete is alas a false positive: the question is valid. The sports pitch does exist; us not able to go onto the rooftop to verify things is irrelevant.

Therefore, closing.