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!

Most Recently Rectified Maps

Title	Last modified	Status
Vol. 2. Plate, C. Map bound by Division Pl., Newtown Creek, Orient St., Vandervoort Ave.; Including Amos St., Bennett St., Parker St., Benton St., Bullion St., Maspeth St., Porter Ave., Varick Ave., Stewart Ave., Cardner Ave., Scott Ave., Seneca Ave. from Detailed estate and old farm line atlas of the city of Brooklyn : complete in six volumes ... from official records, private plans, and actual surveys ... / by G.M. Hopkins, C.E. (In 2 layers) Depicts: 1880 View Map \| Edit/Rectify Map \| Download KML Bibiliographic records: Digital Gallery \| CATNYP	1 day ago.	4 control points.
Vol. 1. Plate, B. Map bounded by Lafayette Ave., Stuyvesant Ave., Putnam Ave., Tompkins Ave.; Including Van Buren St., Greene St., Lexington Ave., Quincy St., Gates Ave., Monroe St., Madison St., Throop Ave., Yates Ave., Lewis Ave. from Detailed estate and old farm line atlas of the city of Brooklyn : complete in six volumes ... from official records, private plans, and actual surveys ... / by G.M. Hopkins, C.E. (In 2 layers) Depicts: 1880 View Map \| Edit/Rectify Map \| Download KML Bibiliographic records: Digital Gallery \| CATNYP	1 day ago.	4 control points.
Vol. 1. Plate, H. Map bound by Atlantic Ave., New York Ave., Butler St., Park Pl., Franklin Ave.; Including Pacific St., Dean St., Bergen St., St. Marks Ave., Prospect Pl., Bedford Ave., Rogers Ave., Nostrand Ave. from Detailed estate and old farm line atlas of the city of Brooklyn : complete in six volumes ... from official records, private plans, and actual surveys ... / by G.M. Hopkins, C.E. (In 2 layers) Depicts: 1880 View Map \| Edit/Rectify Map \| Download KML Bibiliographic records: Digital Gallery \| CATNYP	1 day ago.	4 control points.

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