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 state of Vermont / From surveys under the direction of H.F. Walling ; drawn, engraved, printed, colored and mounted at H.F. Walling's Map Establishment.
From Vermont (In 5 layers) Depicts: 1875
|1875||1 minute ago.||30 control points.|
From Atlas 159, 1885. (In 2 layers) Depicts: 1884
|1884||23 minutes ago.||4 control points.|
Topographical map of New York City, County, and vicinity / Based on Randel's and other official surveys, drawings and modern surveys by J.F. Harrison & T. Magrane.
From New York City & Vicinity (In 3 layers) Depicts: 1853
|1853||about 8 hours ago.||13 control points.|