Map Warper

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Update July 2020: Ran out of disk space. Maps older than 2 years will need re-warping to work. Downtime will happen again.


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
1895 district map from moya copy
1895 about 5 hours ago 5 control points
Topographic map of Canada, Tile 31-H-10, St.Hyacinthe. Scale 1:63360.
about 6 hours ago 4 control points
Topographic map of Canada, Tile 31-H-07, Granby. Scale 1:63360.
about 6 hours ago 4 control points
See all maps

Recent Mosaics

Mosaic Title Year Last Updated Number of Maps Percentage Complete
Or.01 syt km 0 1.1 420x1500 S19 Kraśnik-Łążek
Compiled by AndyB66. Download KML
2016 2 days ago 30 maps 100%
(30 maps)
Private Bogotá y Sabana - Prueba
Compiled by Luis Colón. Download KML
4 days ago 31 maps 100%
(31 maps)
Ps ark 01 S19 Lublin-Kraśnik
Compiled by AndyB66. Download KML
2015 5 days ago 33 maps 100%
(33 maps)
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