We (OpenSeaMap) are open to suggestions on this. The harbour project has
recently been re-started after a hiatus of several years. As we are
building a separate database to contain imports from various public
harbour data sources. These harbour objects only require a simple
"seamark:type=harbour" tag to cause our map to render an icon and pop-up
data from this database with a mouse hover. The question is: how do OSM
mappers contribute to this data? Hence the facility availability tags.
(These tags have existed for years, but were rarely used).
I would be interested to hear (constructive!) ideas.
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