CLHarwood
Junior Member
This popped up on my news feed this week, lots of good information on how to use the old Sanborn maps. It was written for genealogy research but I think would be helpful for detecting as well. HH!
https://www.familytreemagazine.com/...y-of-congress-new-sanborn-maps-for-genealogy/
https://www.familytreemagazine.com/...y-of-congress-new-sanborn-maps-for-genealogy/