Digital elevation model converted to STL file for Floyd, Virginia. Source: USGS Public available elevation data. 10 m resolution. Model 1:100,000 scale 2x vertical exaggeration. You can drop the model below the bed a bit to reduce printing time, about 8mm should work. 

General User disclaimer: This is an artistic representation of a real place in the Earth, sourced from publicly available data. This is an artistic representation and may contain errors, inaccuracies, and in no way should be used for navigation. The designer is in no way liable for misuse of this model. Please print and enjoy this fantastic piece of art. Printed with multiple filaments and some details touched up with marker. Your product may vary slightly