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
2018 17 minutes ago 4 control points
Qtopo a1 pjdlzmfs
QTOPO 1:25,000 printed to size A1 PNG format
2018 about 3 hours ago 4 control points
2018 about 3 hours ago 7 control points
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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
3 days ago 33 maps 100%
(33 maps)
13244 13248 3416 3420 12 admin boundary
Compiled by etajin. Download KML
4 days ago 105 maps 100%
(105 maps)
1927 brookline bromley atlas plate 10 atlas mass brookline 1927 016 9458437191 o 1927 Brookline Bromley Atlas
Mapjunction 00m032 G. W. Bromley & Co., 1927 Compiled by Mapjunction. Download KML
8 days ago 23 maps 100%
(23 maps)
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