oakmad's Profile

Find a vintage poster shop (like Retro Gallery in Houston) or any of the IVPDA members. They all know paper restoration experts around the country, one of the best is in Portland. Essentially what you want done is linen backing, the map is removed from its backing and mounted on linen using a water soluble paste. Its museum quality paper preservation. They can also clean it for you and repair the tears. I've had loads of posters go through the process in much worse condition than your map and they all came through great including tears and missing sections.

Good luck!