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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Recent Mosaics

Mosaic Title Year Last Updated Number of Maps Percentage Complete
Atlas mass middlesex co 1906 007 8881754250 o 1906 Middlesex County Walker Atlas Vol 2
Mapjunction orig 00m039 Anastasia on upWork QUALITY TESTING: Compiled by Mapjunction. Download KML
1906 about 23 hours ago 39 maps 100%
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Missing smoo
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1 day ago 0 maps 0%
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Os donegal townland index 63360 sh03 Donegal-Townland-Index-63360
Layer of all 1:63k Donegal townland index sheets Compiled by Steve_k. Download KML
1956 1 day ago 13 maps 100%
(13 maps)
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