Precise Positioning and the 45th Parallel

Historical marker location:

Perry, Maine

( Marker is on South River Road (U.S. 1) 1.8 miles north of County Route 190, on the left when traveling north.)

Surveying Then and Now.

Maine played an important role in the Underground Railroad: Maine was a major stop on the Underground Railroad, which was a network of secret routes and safe houses used by slaves to escape to freedom in the North.