Map Warper

Log In Create Account
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

Search for

browse all maps

Last Rectified Maps

Map Title Year Last Updated Status
West front 1 month before sur
2020 36 minutes ago Unrectified
Western front
2020 about 1 hour ago 3 control points
2020 about 2 hours ago 4 control points
See all maps

Recent Mosaics

Mosaic Title Year Last Updated Number of Maps Percentage Complete
Txu pclmaps oclc 6540719 palermo 249 2 modificato3 AMS Italy 1:50,000
Italy 1:50,000 Series 4229, U.S. Army Map Service, 1941 Compiled by Andrea Musuruane. Links: Source / Biblio Ref Download KML
1944 1 day ago 43 maps 100%
(43 maps)
3 sw 12d 198203 HKG
Compiled by Download KML
5 days ago 58 maps 100%
(58 maps)
1140x500 pzt kwvxzrfm Pod Skocznią
Compiled by Tomasz Koc. Download KML
5 days ago 3 maps 100%
(3 maps)
View all Mosaics
Create a new mosaic