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!

Upload Map!

What is it?

It's a free to use, open source map warper / map georectifier, and image georeferencer tool. Developed, hosted and maintained by Tim Waters, this project is supported by Topomancy LLC and the New York Public Library.

Mail me at for more information!


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

Doing Digital History 2016 – Map Warper Tutorial
Doing Digital History 2016 is a two week Summer institute sponsored by National Endowment for the Humanities and was held at George Mason university in DC/Arlington earlier in the year.... read more

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Last Rectified Maps

Map Title Year Last Updated Status
Map mazas
2017 about 7 hours ago 9 control points
2017 about 8 hours ago 5 control points
Dub 23 05 1869
Dublin 1869 Sheet 23-05, 25 inch, by kind permission of Trinity College Map library. (In 2 layers)
1869 about 9 hours ago 5 control points
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Recent Mosaics

Mosaic Title Year Last Updated Number of Maps Percentage Complete
Roebuck 1869 Brian H 1969 IRL OS 25 inch
Brian H 1969 IRL OS 25 inch, by kind permission Trinity College Map Library Compiled by Brian Hollinshead. Links: Source / Biblio Ref Download KML
1869 about 9 hours ago 2 maps 100%
(2 maps)
Irl ww 11 1911 6inch near sallygap BrianH Dublin Historic
Compiled by Brian Hollinshead. Download KML
about 9 hours ago 32 maps 100%
(32 maps)
Missing UVM Med Center
This is a map of the UVM Medical Center Compiled by kip.
4 days ago 0 maps 0%
(0 maps)
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