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
Cutting Edge Technology in
Library Services Award from
the Office of Information Policy
of the American Library
Association
Most Recently Rectified Maps
| Map | Title | Year | Last modified | Status |
|---|---|---|---|---|
|
From Counties (In 2 layers)
Depicts: 1858
Bibiliographic records:
Digital Collections
|
1858 | about 3 hours ago. | 3 control points. |
|
From Philadelphia (In 6 layers)
Depicts: 1876
Bibiliographic records:
Digital Collections
|
1876 | about 12 hours ago. | 52 control points. |
|
From Massachusetts (In 5 layers)
Depicts: 1874
Bibiliographic records:
Digital Collections
|
1874 | about 13 hours ago. | 8 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.
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.