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
Pa sgl 226
2020 about 3 hours ago 14 control points
Sgl 226
2020 about 4 hours ago 16 control points
about 5 hours ago 3 control points
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Recent Mosaics

Mosaic Title Year Last Updated Number of Maps Percentage Complete
Missing Flood in South East Iran
Compiled by Sosha.
2020 3 days ago 0 maps 0%
(0 maps)
Wyafntkfttgfbnazsydqkak kifcelnx Land Book of the Borough of Manhattan, City of New York. Desk and Library ed. 1930
Compiled by Julian Boilen. Download KML
3 days ago 201 maps 63%
(127 maps)
1891 ma mrsid west   david rumsey 1891 MA Walker Atlas - David Rumsey
Mosiac of East and West portions Compiled by Mapjunction. Download KML
1891 5 days ago 4 maps 100%
(4 maps)
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