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
Georeferencing mgb
Temple University Digital Mapping
2022 about 8 hours ago 4 control points
Default bcmlrpqj
S. Voisin - 1884
1884 about 9 hours ago Unrectified
Shenandoah map
Topographical map of Shenandoah National Park.
2021 about 10 hours ago 4 control points
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Recent Mosaics

Mosaic Title Year Last Updated Number of Maps Percentage Complete
Paradise winter recreation nov18wmap Mt Rainier Winter Map
Compiled by Ryan.
about 11 hours ago 2 maps 0%
(0 maps)
Missing Edam
Kadasterkaart 1811 Compiled by Henk.
2 days ago 0 maps 0%
(0 maps)
02 dsc9098 1896 Erie Canal Schillner Survey
a mosaic composed of maps from the 1896 Schillner Survey of the NYS Canal System Maps from NYS Archive, scans from the Canal Society of New York website Compiled by Richard Welty. Links: Source / Biblio Ref Download KML
1896 2 days ago 24 maps 100%
(24 maps)
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