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!
Official map of south-west portion of San Bernardino County including San Bernardino & adjacent valleys. California / Compiled from latest official maps of U.S. surveys, railroad and irrigation surveys, county records and other reliable sources & dr...
From California (In 5 layers) Depicts: 1891
|1891||about 10 hours ago.||6 control points.|
from Atlas of Nassau County, Long Island, N.Y. Complete in one volume. Historical, statistical. Based upon maps on file at the county seat in Mineola and upon private plans and surveys furnished by surveyors and individual owners. Supplemented by careful measurements & field observations by our own corps of engineers. (In 1 layer) Depicts: 1914
|1914||5 days ago.||20 control points.|
Map of Louisiana / Surveyor general's office, Donaldsonville, La., Oct. 1st, 1860 ; Wm. J. McCulloh, Sur. Genl. La.
From Louisiana (In 5 layers) Depicts: 1860
|1860||6 days ago.||3 control points.|