Tried lining up a 1747 Bowen map with a modern survey in Vermont and the scale was way off
So I picked up a cheap reproduction of Emanuel Bowen's map of the New England colonies at a flea market in Burlington last month, mostly because I liked the little sea monster drawing. I got the idea to lay it over a current topo printout of my county to see how the towns lined up, and man, it was a mess. The Connecticut River on his map sits a good 8 miles east of where it actually runs, and two towns that should be about 12 miles apart are nearly touching on the old one. Turns out a lot of these 1700s maps were drawn from traveler reports and guesswork, not real surveys, so the longitude is basically made up in spots. I had to keep reminding myself the shape of the land was more of a rough idea back then. Now I'm wondering if there's a decent way to date these reproductions or find out which survey a map like that was based on, since the flea market guy had no clue. Has anyone here worked out a scale for an old map like this without losing their mind?
Bowen maps are mostly decoration, not survey data. For scale, pick two points that still exist today and just do the math. Dating a repro is easier from the paper and print quality than the map itself.