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
Blank map of europe 1714.svg
2021 less than a minute ago 4 control points
Mumbai slums map
2021 5 minutes ago 34 control points
Keijo kasaicho 005
1:600 Contour map of Kasai-cho, Nan-bu, Keijo, 1914 No.5 (In 1 layer)
1914 44 minutes ago 4 control points
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Recent Mosaics

Mosaic Title Year Last Updated Number of Maps Percentage Complete
Keijo kasaicho 001 京城府南部笠井町外四町原圖
1:600 Contour map of Kasai-cho, Nan-bu, Keijo, 1914 Compiled by Qube. Download KML
1914 about 1 hour ago 12 maps 42%
(5 maps)
Archwebviewerstream  1 京城府南部芳山町外三町原圖
1:300 Contour map of Hosan-cho,Nan-bu, Keijo, 1914 Compiled by Qube. Download KML
1914 about 2 hours ago 12 maps 100%
(12 maps)
Cairo10 Cairo 1958
Compiled by Jackie Coquillette. Download KML
about 19 hours ago 1 map 100%
(1 map)
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