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!
|1908||26 minutes ago.||5 control points.|
|1908||34 minutes ago.||6 control points.|
|1908||42 minutes ago.||7 control points.|