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
Austria 1920
2021 1 minute ago Unrectified
1944 us army   paramushir  south
1944 10 minutes ago 14 control points
Cad map brisbane and suburbs gordon and gotch ca1920
2021 21 minutes ago 25 control points
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Recent Mosaics

Mosaic Title Year Last Updated Number of Maps Percentage Complete
S19 fragment 1 S19 Lublin-Obroki
Compiled by AndyB66. Download KML
2016 about 4 hours ago 11 maps 100%
(11 maps)
1900 national publishing railroad map of connecticut  massachusetts  and rhode island   geographicus   mactri nationalpublishing 1900 test
Compiled by Anelise Hanson Shrout. Download KML
3 days ago 2 maps 100%
(2 maps)
Missing Heywood Distr Park M1
Compiled by Chris Bates. Links: Source / Biblio Ref
4 days ago 0 maps 0%
(0 maps)
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