NYPL Map Warper: Home -

How to use this tool

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!

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Most Recently Rectified Maps

Title	Year	Last modified	Status
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 View Map \| Rectify Map \| Download KML Bibiliographic records: Digital Collections	1875	1 minute ago.	30 control points.
Staten Island, Plate No. 23 Map bounded by Burger, Williams, Broadway From Atlas 159, 1885. (In 2 layers) Depicts: 1884 View Map \| Rectify Map \| Download KML Bibiliographic records: Digital Collections	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 View Map \| Rectify Map \| Download KML Bibiliographic records: Digital Collections	1853	about 8 hours ago.	13 control points.

More Rectified Maps...

There are no known US copyright restrictions in maps available through Map Warper.
NYPL is distributing these images under a Creative Commons CC0 1.0 Universal Public Domain Dedication.
For more information, see the Export tab for a map.