Map Warper

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Find maps and other imagery, upload, and rectify against a real map.

You can then download and use the rectified map in your mapping applications.

Just sign up and you can start uploading and get warping!

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What is it?

It's a free to use, open source map warper / map georectifier, and image georeferencer tool. Developed, hosted and maintained by Tim Waters, this project is supported by Topomancy LLC and the New York Public Library.

Mail me at for more information!


Internationalization (i18n) and Translations for Mapwarper. (English, Dutch, Japanese)
Many thanks to Ellen Gehring of Erfgoed Leiden en Omstreken for the Dutch translations. Ellen with the ELO wanted their own warper and because of this, support for locales, internationalisation and... read more

New shortcuts and add layer features in has been updated with several months of the latest code. Some of these features are directed towards the rectify map interface with the addition of keyboard shortcuts and the... read more

What’s coming to – new stuff! is getting an upgrade of code early this first week in April. New things: Keyboard shortcuts New JSON-API and docs Map caching for faster maps Bigger map windows Upgraded... read more

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Last Rectified Maps

Map Title Year Last Updated Status
London 1560 map
late middle ages map. Very inaccurate, but can it be warped?
2021 5 months ago 15 control points
Karl spruner von merz  paris am ende des xvi jahrhunderts  1854   david rumsey
16th c map of paris
1600 5 months ago 21 control points
Jx217xm7539 00 0001
Prepared under the direction of Chief of the Engineers, GHQ, AFPAC, U.S. Army, by Nippon Map Co., Tōkyō, Feb. 1946, the map depicts the bombardment of Tokyo from 1944-1945, administrative and municipal boundaries, transportation routes, and water features.
1946 11 months ago 8 control points
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Recent Mosaics

Mosaic Title Year Last Updated Number of Maps Percentage Complete
4112 Karjalan kartat, 1:100 000 topografinen
Maanmittaushallitus ja Topografikunta valmistivat neliväristä topografista karttaa 1:100 000 vuosina 1928-51. Normaalilehden koko on 30 km x 40 km eli se kattaa 12 1:20 000 lehden aluetta. Kartoilla esitetään yleiset maastotiedot mukaan lukien korkeuskäyrät ja nimistö. Esitystapa on 1:20 000 karttaa yleispiirteisempi, mutta toisaalta samalla karttalehdellä voi tarkastella tuntuvasti laajempaa aluetta. Kartta kattaa koko Kannaksen ja Laatokan Karjalan. Kartta antaa hyvän ja varsin yksityiskohtaisenkin kuvan asutuksesta ja luontosuhteista. Se sopii hyvin esimerkiksi kylätason tarkasteluun. Compiled by Jouni Tuominen. Links: Source / Biblio Ref Download KML
1928 over 4 years ago 47 maps 100%
(47 maps)
 ahlainen  1 Senaatin kartasto, 1:21 000 topografinen
Senaatin kartasto on toinen Senaatin kartastojen sarjoista. Maanmittausylihallituksessa alun perin ollut sarja on sijoitettu osaksi Rauhankadun toimipisteessä säilytettävää maanmittaushallituksen historiallista kartta-arkistoa. Compiled by Jouni Tuominen. Links: Source / Biblio Ref Download KML
over 4 years ago 404 maps 100%
(404 maps)
Missing Senaatti
Compiled by Markus Merenmies.
over 4 years ago 0 maps 0%
(0 maps)
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