(Blogpost auf Deutsch unter www.geo.ebp.ch)
I believe in abstraction for conveying information, or ‘rough’ context for information, efficiently. Since a while, hex and square tile maps are all the rage in the US. Check out this post by the npr visuals team on the technique, with some US examples:
(Side-note: As you can see, Switzerland has this peculiar concept of half-cantons, that’s what the triangular shapes are)
I put a shapefile, an svg file and an ArcGIS project file on GitHub. Feel free to use any of these resources, cc-by license applicable.