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NYPL Map Warper

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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

Map Title Last modified Status
?t=t&id=1505046
from America: being the latest, and most accurate description of the Nevv vvorld; containing the original of the inhabitants, and the remarkable voyages thither. The conquest of the vast empires of Mexico and Peru, and other large provinces and territories, with the several European plantations in those parts. Also their cities, fortresses, towns, temples, mountains, and rivers. Their habits, customs, manners, and religions. Their plants, beasts, birds, and serpents. With an appendix, containing, besides several other considerable additions, a brief survey of what hath been discover'd of the vnknown south-land and the Arctick region. Collected from most authentick authors, augmented with later observations, and adorn'd with maps and sculptures, by John Ogilby ... (In 3 layers) Depicts: 1671
about 11 hours ago. 45 control points.
?t=t&id=1576154
from New topographical atlas of Erie Co., New York, from actual surveys especially for this atlas. (In 3 layers) Depicts: 1866
about 20 hours ago. 3 control points.
?t=t&id=433814
from An atlas of the state of New York : containing a map of the state and of the several counties. / Projected and drawn under the superintendence and direction of Simeon de Witt ... And also the physical geography of the State ... (In 3 layers) Depicts: 1829
about 21 hours ago. 3 control points.
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.