Add label for amenity=car_sharing

[matthijsmelissen]

amenity=car_sharing is currently rendered with icon, but without label. In bigger places there are multiple operators, so rendering the name or operator value would be nice.

See also https://trac.openstreetmap.org/ticket/3526.

[matkoniecz]

I want to encourage interested people to reach some consensus what should be displayed - name/operator/brand. I know less that it is necessary to decide on some variant - and I want to implement some kind of label as part of refactoring and fixing amenity-points.

[HolgerJeromin]

In the cities i checked, brand is not often used but operator.
In Aachen, Stuttgart, Heilbronn, Karlsruhe and Cologne you would be interested in the "name (operator)" (or operator if name is missing) for selecting the location for your rental.

[nebulon42]

Is there a consensus yet? I'd like to fix #857, but I don't know how the label should be displayed.

[sb12]

This has been solved by #1452.

[matthijsmelissen]

Thanks for pointing out.