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!
Berkeley County, Virginia / Compiled under the direction of Lieut. Col. J.N. Macomb, A.D.C. chf. top. engs. : for the use of Maj. Gen. Geo. B. McClellan, commanding U.S. Army, 1861 ; improved & extended by D.H. Strother, Lt. Col. 3d Va. Cavalry, A.A.D.C.
From West Virginia (In 5 layers) Depicts: 1861
|1861||2 days ago.||5 control points.|
from New general atlas. (In 2 layers) Depicts: 1860
|1860||2 days ago.||4 control points.|
Big Flats Village; Big Flats Subscriber's Business Directory.; Horse Heads Subscriber's Business Directory.; Breesport Village
from Atlas of Chemung Co., New York : from actual surveys / by and under the direction of F. W. Beers ; assisted by Geo. P. Sanford & others. (In 1 layer) Depicts: 1869
|1869||3 days ago.||8 control points.|