Map Warper

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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
09b388e81bcf2022fb8763e79178cfe5 ourglnyd
1911 17 minutes ago 7 control points
Ma worcester north 20150715 tm geo
2015 29 minutes ago 7 control points
1983 ma worcester north 351448 25000 geo
1983 36 minutes ago 13 control points
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Recent Mosaics

Mosaic Title Year Last Updated Number of Maps Percentage Complete
Getpreviewfile Hong Kong 1968
Collection of latest out-of-copyright topographic maps in Hong Kong Compiled by Download KML
1968 about 2 hours ago 10 maps 100%
(10 maps)
Ohv 4th page 2 OR/WA OHV
Compiled by Steven Beardsley. Download KML
1 day ago 34 maps 100%
(34 maps)
Cpage 2 Raleigh Sanborn 1914 P2-P31
Raleigh Sanborn 1914 Pages 2 through 31, mosaic together. Compiled by Mark Klose. Download KML
1914 2 days ago 30 maps 100%
(30 maps)
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