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
Lapaz 1941 v3
1941 27 minutes ago 8 control points
Ca napa 299520 1902 125000 geo
2020 40 minutes ago 4 control points
Greenfield Church in Fairfield, CT and surrounding lots
2020 41 minutes ago 2 control points
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Recent Mosaics

Mosaic Title Year Last Updated Number of Maps Percentage Complete
Hopkins 1919 plate 27 Jersey City Downtown Waterfront 1919
Compiled by John Beekman. Download KML
1919 about 6 hours ago 7 maps 100%
(7 maps)
Getpreviewfile Hong Kong 60s
Collection of latest out-of-copyright topographic maps in Hong Kong Compiled by Download KML
1969 about 15 hours ago 90 maps 100%
(90 maps)
12001 1956 2r 123 UF campus mosaic
Compiled by Paul Kirk. Download KML
1956 1 day ago 1 map 100%
(1 map)
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