2007-2009 Ohio Official Transportation Map – http://www.dot.state.oh.us/map1/ohiomap/
from http://www.sandusky-county-scrapbook.net/SenecaJohnPhotos/images/Ohio_1820.jpg
http://worldmapsonline.com/SatPosters/OhioSpace.jpg
http://www.mapwatch.com/news-blog/images/ground-water-resource-map.gif
Here is a new map of the redistricting of Ohio congress: http://chadely.com/2012/ohio/congress/ohio-districts-2012.html