Comment 9 for bug 1234725

>Personally, I'd prefer to hide the port spots if covered under trees, stones or buildiings.

My intention was to hide them too, if covered. The point was to hint the existence of port space, if the player could accidentally build something that blocks the harbor.

 With forests expanding over time, do unused port spaces with trees nearby have a "best before" date? In other words, can an expedition benefit a port space if trees have concurered it? Should an expedition also carry a stonecutter and lumberjack, to overcome cases like this? (surely not in b18, but long term.)