Map Warper

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Update Nov 2021: Ran out of disk space, again. Downtime will happen again. Please try to delete your maps (edit tab) after you are done with them for other users.


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
Provinz brandenburg 1905
Jüdische Friehöfe in der Provinz Brandenburg
2021 about 2 hours ago 3 control points
Usgs ngm23505 3
1983 about 6 hours ago 4 control points
Screen shot 2021 12 01 at 8.07.28 pm
2021 about 11 hours ago 12 control points
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Recent Mosaics

Mosaic Title Year Last Updated Number of Maps Percentage Complete
Cairo9 Cairo 1958
Compiled by Jackie Coquillette. Download KML
about 12 hours ago 2 maps 50%
(1 map)
Ark 2.1 pw syt 1 rdz DK47 Rdzawka - Nowy Targ
Compiled by AndyB66. Download KML
2013 1 day ago 7 maps 100%
(7 maps)
L 09nxftquwyb1iwl jc8ap duiphnbt Land Book of the Borough of Manhattan, City of New York. Desk and Library ed. 1930
Compiled by Julian Boilen. Download KML
1 day ago 187 maps 99%
(186 maps)
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