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
1905 dekalbcoplatmap sycamore town1
From Standard atlas of De Kalb county, Illinois, including a plat book of the villages, cities, and townships of the county. Map provided courtesy of the Illinois History and Lincoln Library at the University of Illinois at Urbana-Champaign.
1905 36 minutes ago 35 control points
2018 about 1 hour ago Unrectified
2018 about 1 hour ago Unrectified
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Recent Mosaics

Mosaic Title Year Last Updated Number of Maps Percentage Complete
Atlas mass cambridge 1894 010 9461374780 o 1894 Cambridge Bromley Atlas 00m354
00m354 1894 Cambridge Bromley Atlas Aligned for Mapjunction by Anastasia Lavrenteva on Compiled by Mapjunction. Download KML
about 17 hours ago 33 maps 100%
(33 maps)
Palosverdes colorado parks
Compiled by Jeremy S. Download KML
about 19 hours ago 81 maps 98%
(79 maps)
13244 13248 3416 3420 12 admin boundary
Compiled by etajin. Download KML
7 days ago 105 maps 100%
(105 maps)
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