OpenSeaMap-dev:Skyline
Aim
It would be fine to have a skyline for harbour approach.
Some harbours don't have a sufficient help for safe approach by lights and/or buoys, or are difficult by night or day. Some coasts are very flat, and also the islands around, and it is very difficult to see where to steer.
So it would be fine to have a skyline, graphic or as panorama photo, with mountains and trailing and rising edges behind, enriched by landmarks like church, church tower, big and/or high buildings, silos, gas and fuel tanks, skycraper, radio towers, windmills, etc.
This we could link on the chart, in the approach (in front) of the harbour, as a popup-graphic.
