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!
Map of the city of Boston and vicinity / Drawn by G.W. & W.S. Bromley, Phila. ; corrected and printed by City of Boston.
From Massachusetts (In 5 layers) Depicts: 1896
|1896||about 8 hours ago.||3 control points.|
From Whole (In 4 layers) Depicts: 1865
|1865||about 8 hours ago.||4 control points.|
Map of the United States and territories / Compiled from the official surveys of the General Land Office, and other authentic sources, under the direction of the Hon. Willis Drummond, commissioner.
From Whole (In 4 layers) Depicts: 1873
|1873||about 9 hours ago.||8 control points.|