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
Mahalleler ankara
Map of the districts of Ankara
2020 about 2 hours ago 23 control points
Whiteclayconstruction9 1 17
2020 about 5 hours ago 8 control points
White clay creek preserve
2020 about 6 hours ago 6 control points
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Recent Mosaics

Mosaic Title Year Last Updated Number of Maps Percentage Complete
Getpreviewfile Hong Kong 60s
Collection of latest out-of-copyright topographic maps in Hong Kong Compiled by Download KML
1969 2 days ago 80 maps 100%
(80 maps)
Hopkins1919 plate29 Morris Canal in Jersey City circa 1919
Plates from 1919 Hopkins Atlas showing the route of the Morris Canal in Jersey City just prior to its official abandonment in 1924. Compiled by John Beekman. Download KML
1919 2 days ago 8 maps 100%
(8 maps)
E010695199 v8 North Bay
Compiled by Tessa Alex. Links: Source / Biblio Ref Download KML
1905 5 days ago 21 maps 76%
(16 maps)
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