I am looking for a high-resolution scan of Eduard Imhof's hand-painted relief map of Walensee from 1938 ("Karte der Gegend um den Walensee", 1:10,000). (It is in the public domain)
The original painting is huge (about 4.8 × 2 meters) and belongs, as far as I know, to ETH Zurich. I can only find small, low-quality photos online, but I would like to make a high-quality print.
Does anyone have a high-resolution version that they are willing to share, or know if there is one online (e.g. from ETH, Swisstopo, or an archive)?
Thanks!
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MrFrankly