look closer, right in the middle of this map fragment near denmark there is a rectangle inscripted ESD 138 and ESD 139. turns out these are military designated zones, where planes and ships are sometimes restricted. link about the first one is in the post, about the second one I could not even find info
...I didn't expect that #OpenStreetMap tiles include military facilities (• ▽ •;)
(look right in the middle)
(was randomly spinning the map, having fun with completed #eez, found these... danger zones or something)
mapcarta.com/W383490935 - on esd 138
#maps #OSM #geosky #geospatial #sea