[Tagging] Clean-up the seamark landmark tags on the wiki (and perhaps later in the db)

[Andreas Labres]

On 24.11.12 20:59, Martin Koppenhoefer wrote:
> what about landmark=yes?

IMO it should read maritime_landmark=yes to indicate, that this tower or
building or quary or whatever is a landmark that is suitable for maritime
navigation. This key can then be used for a maritime map to decide whether to
draw a feature or not.

That is almost the same as "it is visible from sea", but visibility is
changing/can be limited.

/al