Hi, when you zoom in the examples in the "External data" section, you may see that, for example, Alaska is shaded not only on the continent, but also on 20-km range in the sea. What is the reason? It looks wierd when you use this feature to color one province and not the neighbouring provinces.
Ok, I guess the shape from OpenStreetMap is retrieved. I wish it could use https://commons.wikimedia.org/wiki/Data:Alaska.map (although this one seems imperfect).