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!

Recipient of the 2012
Cutting Edge Technology in
Library Services Award from
the Office of Information Policy
of the American Library
Association
Oitp logo 2012

Most Recently Rectified Maps

Title	Year	Last modified	Status
A plan of the battle, on Bunkers Hill / by an officer on the spot. From Massachusetts (In 5 layers) Depicts: 1775 View Map \| Rectify Map \| Download KML Bibiliographic records: Digital Collections	1775	about 11 hours ago.	3 control points.
A map of the British colonies in North America : with the roads, distances, limits, and extent of the settlements, ... / by ... Jno. Mitchell ; Tho. Kitchin, sculp. from Parts (In 1 layer) Depicts: 1775 View Map \| Rectify Map \| Download KML Bibiliographic records: Digital Collections	1775	about 12 hours ago.	3 control points.
Map of the Indian Territory, Northern Texas and New Mexico. from Supplement to the New York observer. (In 1 layer) Depicts: 1842 View Map \| Rectify Map \| Download KML Bibiliographic records: Digital Collections	1842	about 12 hours ago.	36 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.