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
Statenisland s10 m25
2017 1 minute ago 5 control points
Plano de la bahia de cartagena de indias marzo 1791
1791 4 minutes ago Unrectified
Fmapoteca 994 figac 26 dcpjxqit
2017 6 minutes ago 8 control points
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Recent Mosaics

Mosaic Title Year Last Updated Number of Maps Percentage Complete
36csw191707b Western Front 1917 07
Western Front in The Great War, as close to July 1917 as could be found. Please contact if missing maps found and available for use here. Maps sources: McMaster University depository of maps Under Creative Commons license. Compiled by Fed. Links: Source / Biblio Ref Download KML
1917 41 minutes ago 52 maps 100%
(52 maps)
1875 charlestown hopkins atlas plate a 1875 Charlestown Hopkins Atlas
1875 Atlas of Charlestown - Hopkins and Co. 00m140 MOSAIC Photoshopped / Aligned for Mapjunction by Rory McCarthy on - Atlas of the county of Suffolk, Massachusetts, vol. 6 : including the late city of Charlestown, now wards 20, 21, 22 City of Boston, G.M. Hopkins & Co., 1875 Compiled by Mapjunction. Download KML
1875 about 1 hour ago 16 maps 100%
(16 maps)
C2743 21 9 8mb a
Compiled by juglozanoca. Download KML
1 day ago 1 map 100%
(1 map)
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