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!

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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!


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

Mapwarper Tutorial & Spatial Humanities Workshop by Lincoln Mullen
Lincoln Mullen has written a great series of workshops on the Spatial / Digital Humanities over five days. Day 3 is focused around Georectification with and is a very... read more

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Last Rectified Maps

Map Title Year Last Updated Status
Ballarat East -12 Township Plan, Imperial measure 5031
2018 about 1 hour ago 3 control points
Beato liebana burgo osma facsimile edition 11
2018 about 1 hour ago 8 control points
Sanborn   downtown cc
2018 about 1 hour ago 14 control points
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Recent Mosaics

Mosaic Title Year Last Updated Number of Maps Percentage Complete
Palosverdes colorado parks
Compiled by Jeremy S. Download KML
about 22 hours ago 173 maps 99%
(171 maps)
20180904t122438 Carte d'arpentage [...]
Compiled by foxandpotatoes. Download KML
9 days ago 4 maps 100%
(4 maps)
Es 49 Mumbai MCGM DP 2034
ES49 and ES53 in Mulund Compiled by Arun Ganesh. Download KML
10 days ago 2 maps 100%
(2 maps)
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