There's a difference between map-data, and maps. That is, a map is something more than a collection of data.
The individual datapoints don't enjoy copyright, it's the creative and artistic expression of them, including the selection of which facts to show, that may.
Feel free to, for example, copy the fact that Oslo is capitol of Norway from a map, from a encyclopedia, from any other copyrigthed work. That fact is not, and can not be, copyrigthed. But a text that writes about Norway and mentions the capitol, can be. And a map that shows Norway, and displays the capitol, also can be.