[Tagging] 2 meaning for crossing=zebra

[Tobias Knerr]

On 26.10.2018 16:24, Tom Pfeifer wrote:
> Do you see the contradiction? If the crossing is unmarked, the ground
> object already does not provide any guidance. As we map what's on the
> ground, there is nothing to map.

It's not uncommon for a crossing to be physically evident on the ground
(e.g. because of lowered kerbs) even if there are no painted markings.
To me, that would be a typical example of an unmarked crossing.