Map Warper

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Update Nov 2021: Ran out of disk space, again. Downtime will happen again. Please try to delete your maps (edit tab) after you are done with them for other users.


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
Laguna de perlas nicaragua 50k 3453ii 1965
Laguna de Perlas, 3453ii, Nicaragua, OpenTopo, USGS, E751, E751X34542
1965 about 8 hours ago 4 control points
2022 about 8 hours ago Unrectified
Kaart van de jurisdictie verwolde 1811
1811 about 9 hours ago 27 control points
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Recent Mosaics

Mosaic Title Year Last Updated Number of Maps Percentage Complete
Dtp102706 Goad Plan d'assurance de Constantinople : Vol. II Pera et Galata / Chas. E. Goad
Compiled by Arkadiusz B. Download KML
about 15 hours ago 14 maps 100%
(14 maps)
Plate 26 test Plate Alignment Test
Compiled by Dennis. Download KML
9 days ago 2 maps 100%
(2 maps)
La pavona nicaragua 50k 2956ii 1965 OpenTopo Nicaragua
OpenTopo maps of Nicaragua published by USGS under CCL Compiled by miluethi. Links: Source / Biblio Ref Download KML
9 days ago 97 maps 100%
(97 maps)
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