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
Ernest mamboury
2022 14 minutes ago 4 control points
Or atlas plate 60
Fourth Epoch Map of Atlanta Campaign from Official Records War of the Rebellion Atlas - Plate 60 (In 2 layers)
1901 about 7 hours ago 10 control points
Nc sc casarez
1860 about 14 hours ago 1 control point
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Recent Mosaics

Mosaic Title Year Last Updated Number of Maps Percentage Complete
Or atlas plate 57 2 Atlanta Campaign Mosaic
Composite of Epochs of Atlanta Campaign Compiled by Robert Hale. Links: Source / Biblio Ref Download KML
1864 about 7 hours ago 4 maps 100%
(4 maps)
Or atlas plate 57 2 Atlanta Campaign Epoch Mosaic
Compiled by Robert Hale. Download KML
about 7 hours ago 4 maps 100%
(4 maps)
Bromley 1911 plate 1 Bromley Manhattan 1911
Compiled by Rallye Shen. Links: Source / Biblio Ref Download KML
1911 1 day ago 50 maps 100%
(50 maps)
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