There's a good ecosystem for Lithophanes [0][1] and maps [2][3]. This would be a cool addition to that.
[0] https://all3dp.com/2/how-to-3d-print-your-own-lithophane/
[1] https://www.youtube.com/channel/UCU13fzqAu4BTAhOSHJgHRqg
[2] https://blog.prusa3d.com/how-to-print-maps-terrains-and-land...