This piece is a raised-relief terrain map of Michigan at 1:7.5M scale, with 50:1 vertical exaggeration.
Purchase a finished ornament from my Etsy shop at
https://www.etsy.com/listing/479977420/michigan-3d-printed-christmas-ornament
The source of the elevation data is the U.S. Geological Survey. The USGS home page is http://www.usgs.gov/.