Map Warper

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Update July 2020: Ran out of disk space. Maps older than 2 years will need re-warping to work. Downtime will happen again.


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!

Upload Map!

What is it?

It's a free to use, open source map warper / map georectifier, and image georeferencer tool for individuals and small groups. Developed, hosted and maintained by Tim Waters. If you like this project, please consider donating to keep the project going.

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
Rudolph 1936
map of Potosí lakes
2021 33 minutes ago 5 control points
Screenshot 2021 04 14 163120
2021 39 minutes ago 3 control points
New york subway map
2021 about 1 hour ago 10 control points
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Recent Mosaics

Mosaic Title Year Last Updated Number of Maps Percentage Complete
1616145973214 0 1866 Laga skifte Hökmark
1866 Laga skifte Hökmark Aktbeteckning 24-lör-192 Län Västerbottens län Kommun Skellefteå Datum 1871-06-09 Åtgärd Laga skifte Antal bilder 479 Compiled by Cecilia. Links: Source / Biblio Ref Download KML
1866 2 days ago 19 maps 11%
(2 maps)
Missing Mühendishane-i Berri Hümayun
1845 İstanbul Haritası Compiled by Muhammed Ali Başaran.
1845 6 days ago 0 maps 0%
(0 maps)
Brenna 1837 orig barlassina Mappa del Brenna
Mappa del tenente Brenna - 1837-1850 Compiled by maurizioa. Download KML
7 days ago 6 maps 100%
(6 maps)
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