When I was a kid, my father brought home from I know not where an enor­mous col­lec­tion of Nation­al Geo­graph­ic mag­a­zines span­ning the years 1917 to 1985. I found, tucked in almost every issue, one of the magazine’s gor­geous maps—of the Moon, St. Peters­burg, the Himalayas, East­ern Europe’s ever-shift­ing bound­aries. I became a car­tog­ra­phy enthu­si­ast and geo­graph­i­cal sponge, por­ing over them for years just for the sheer enjoy­ment of it, a plea­sure that remains with me today. Whether you’re like me and sim­ply love the imag­i­na­tive exer­cise of trac­ing a map’s lines and con­tours and absorb­ing infor­ma­tion, or you love to do that and you get paid for it, you’ll find innu­mer­able ways to spend your time on the new Open Access Maps project at the New York Pub­lic Library. The NYPL announces the release with the expla­na­tion below:

The Lionel Pin­cus & Princess Firyal Map Divi­sion is very proud to announce the release of more than 20,000 car­to­graph­ic works as high res­o­lu­tion down­loads. We believe these maps have no known US copy­right restric­tions.* To the extent that some juris­dic­tions grant NYPL an addi­tion­al copy­right in the dig­i­tal repro­duc­tions of these maps, NYPL is dis­trib­ut­ing these images under a Cre­ative Com­mons CC0 1.0 Uni­ver­sal Pub­lic Domain Ded­i­ca­tion. The maps can be viewed through the New York Pub­lic Library’s Dig­i­tal Col­lec­tions page, and down­loaded (!), through the Map Warp­er.

What does this mean? Sim­ply put, “it means you can have the maps, all of them if you want, for free, in high res­o­lu­tion.” Maps like that above, of New York’s Cen­tral Park, issued in 1863, ten years before Fred­er­ick Law Olm­st­ed and Calvert Vaux com­plet­ed their his­toric re-design.

Can you—as I did with my neat­ly fold­ed, yel­low­ing archive—have all the maps in full-col­or print? Well, no, unless you’re pre­pared to bear the cost in ink and paper and have some spe­cial­ized print­ing equip­ment that can ren­der each map in its orig­i­nal dimen­sions. But you can access some­thing worlds away from what I could have imagined—a dig­i­tal enhance­ment tech­nol­o­gy called “warp­ing,” also known as “geo­rec­ti­fi­ca­tion.”

This, explains the NYPL, “is the process where dig­i­tal images of maps are stretched, plac­ing the maps them­selves into their geo­graph­ic con­text, ren­dered either on the web­site or with tools such as Google Earth.” For exam­ple, below see a “warp­ing” of the 1916 Redraft of the 1660 “Castel­lo Plan” for then-New Ams­ter­dam over a cur­rent-day Google Earth image of low­er Man­hat­tan (and note how much the island has been expand­ed past its 17th cen­tu­ry shores). The “warp­ing” tech­nol­o­gy is open access, mean­ing that “any­body with a com­put­er can cre­ate an account, log in, and begin warp­ing and trac­ing maps.” User con­tri­bu­tions remain, “a la Wikipedia,” and add “one more piece to this new his­tor­i­cal geo­graph­ic data mod­el.”

The “warp­er” is a spe­cial fea­ture that helps place his­tor­i­cal maps in a mod­ern visu­al field, but it in no way ruins the enjoy­ment of those maps as archival pieces or art objects. You can see car­tog­ra­ph­er John Wol­cott Adams orig­i­nal 1916 Castel­lo Plan redraft below, and vis­it NYPL’s Dig­i­tal Col­lec­tions for a high res­o­lu­tion image, ful­ly zoomable and, yes, print­able. For more on the incred­i­ble warp­ing tech­nol­o­gy NYPL makes avail­able to us, see this extend­ed blog post, “Unbind­ing the Atlas: Work­ing with Dig­i­tal Maps.” Over ten thou­sand of the collection’s maps are of New York and New Jer­sey, dat­ing from 1852 to 1922, includ­ing prop­er­ty, zon­ing, and topo­graph­ic maps. In addi­tion, over one thou­sand of the maps depict Mid-Atlantic cities from the 16th to the 19th cen­turies, and over 700 are topo­graph­ic maps of the Aus­tro-Hun­gar­i­an Empire between 1877 and 1914. That should be enough to keep any ama­teur or pro­fes­sion­al map-lover busy for a good long while. Start dig­ging into the maps here.

Relat­ed Con­tent:

The British Library Puts 1,000,000 Images into the Pub­lic Domain, Mak­ing Them Free to Reuse & Remix

Down­load 15,000+ Free Gold­en Age Comics from the Dig­i­tal Com­ic Muse­um

Down­load Over 250 Free Art Books From the Get­ty Muse­um

14,000 Free Images from the French Rev­o­lu­tion Now Avail­able Online

Josh Jones is a writer and musi­cian based in Durham, NC. Fol­low him at @jdmagness