A lighthouse map

That's crazy! Lighthouse map visualizes lighthouses with their range, color, and flash patterns.

It asks the Overpass API for all elements with an seamark:light:sequence or seamark:light:1:sequence attribute, decodes these, and displays them as coloured circles on the map using Leaflet. It also tries to take the seamark:light:range and seamark:light:colour into account.

It's provided by Geodienst, which belongs to the Center of Information Technology of the University of Groningen.

Lighthouse map by the Center of Information Technology of the University of Groningen