Hello,
This solution perhaps misses the mark, but it's another idea to keep in mind for map display.
Stanford's paper conservator Deb Fox once suggested having a large magnet board in the Map Room so that users could see the center of large maps without leaning over them on a table top. Because Deb was coming from the perspective of preservation, she liked the idea of using magnets because they would neither pierce nor kind the paper.
Good luck and please share your solution!
Best,
Emily Prince
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Map Cataloger
Branner Earth Sciences Library & Map Collections
Stanford University