They only show when the layer is loaded in the map (the osm tiles are in the national view as well, because it makes for a somewhat smoother transition to state level, but they are covered by the other tiles).
Let me know if you approve of this solution or i should rephrase something. If you have no changes to suggest, I will merge this.
Bachibouzouk
commented
4 years ago 
Closes #307
@yelsre this removes the ☮ sign and adds attribution to se4all with the link to the about map page.
the sources now read:
They only show when the layer is loaded in the map (the osm tiles are in the national view as well, because it makes for a somewhat smoother transition to state level, but they are covered by the other tiles).
Let me know if you approve of this solution or i should rephrase something. If you have no changes to suggest, I will merge this.