The NYPL Map Rectifier

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Smart card ...
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Cool tool ...
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The NYPL Map Rectifier 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!

	Outline & Index Map of Volume One, Atlas of New York City, Borough of Manhattan : 59th Street to 110th Street. 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 2 layers) View Map | Edit/Rectify Map Bibiliographic records: Digital Gallery | CATNYP	about 1 year ago.	Unrectified.
	Plate 40, Part of Section 4: Bounded by Twelfth Avenue Hudson River Piers, W. 59th Street, Eleventh Avenue and W. 50th Street. 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 2 layers) View Map | Edit/Rectify Map Bibiliographic records: Digital Gallery | CATNYP	about 1 year ago.	Unrectified.
	Plate 30, Part of Section 4: Bounded by W. 47th Street, Seventh Avenue, W. 42nd Street and Ninth Avenue. 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 2 layers) View Map | Edit/Rectify Map Bibiliographic records: Digital Gallery | CATNYP	about 1 year ago.	Unrectified.
	Plate 29, Part of Section 4: Bounded by W. 47th Street, Ninth Avenue, W. 42nd Street and Eleventh Avenue. 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 2 layers) View Map | Edit/Rectify Map Bibiliographic records: Digital Gallery | CATNYP	about 1 year ago.	Unrectified.
	Borough of Richmond, Topographical Survey. from Borough of Richmond, Topographical Survey. (In 2 layers) View Map | Edit/Rectify Map Bibiliographic records: Digital Gallery | CATNYP	about 1 year ago.	Unrectified.

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Read more: http://maps.nypl.org/warper/

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