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
Part of Section 3 : New York City. from Atlas of the city of New York, borough of Manhattan. From actual surveys and official plans / by George W. and Walter S. Bromley. (In 1 layer) Depicts: 1911 View Map \| Rectify Map \| Download KML Bibiliographic records: Digital Collections	1911	1 day ago.	18 control points.
Double Page Plate No. 22, Part of Sections 11 & 12, Borough of the Bronx: Bounded by Grand Avenue, W. Kingsbridge Road, Jerome Avenue, E. 196th Street, Valentine Avenue, E. 188th Street and W. Fordham Road From Volume Two: North of 172nd Street 1938 (In 3 layers) Depicts: 1938 View Map \| Rectify Map \| Download KML Bibiliographic records: Digital Collections	1938	1 day ago.	6 control points.
Double Page Plate No. 23, Part of Sections 11 & 12, Borough of the Bronx: Bounded by Valentine Avenue, E. 196th Street, Bainbridge Avenue, E. 197th Street, Fordham University Webster Avenue, E. Fordham Road, Washington Avenue, E. 189th Street, Webs... From Volume Two: North of 172nd Street 1938 (In 3 layers) Depicts: 1938 View Map \| Rectify Map \| Download KML Bibiliographic records: Digital Collections	1938	2 days ago.	6 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.