The NYPL Map Warper is a tool for digitally aligning (« rectifying ») historical maps from the NYPL’s collections to match today’s precise maps. Visitors can browse already rectified maps or assist the NYPL by aligning a map. Play the video above to tour the site and learn how to rectify a map yourself.
Everyone is welcome to participate!
via Loïc Haÿ
See on maps.nypl.org