Map Warper

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Update July 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
Daoudene 2013 ereendavaa 2
From Daoudene et al. 2013. Timing of exhumation of the Ereendavaa metamorphic core complex north-eastern Mongolia – U–Pb and 40Ar/39Ar constraints 10.1016/j.jseaes.2011.04.009
2013 about 3 hours ago 6 control points
2021 about 6 hours ago Unrectified
2021 about 7 hours ago Unrectified
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Recent Mosaics

Mosaic Title Year Last Updated Number of Maps Percentage Complete
Missing WARMF
Compiled by Marina. Download KML
5 days ago 2 maps 100%
(2 maps)
Trem0001 Toronto Map 1860
Found and collected from Compiled by Hannes Rost. Links: Source / Biblio Ref Download KML
1860 5 days ago 2 maps 100%
(2 maps)
196 se 15 1968 Hong Kong 60s
Collection of latest out-of-copyright topographic maps in Hong Kong Compiled by Download KML
1969 9 days ago 110 maps 100%
(110 maps)
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