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.