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
Image uploaded from ios 1024
2017 24 minutes ago 5 control points
Map 1911
A combination of plates 4 and 6 of the 1911 atlas, illustrating Salem's Point neighborhood, which was destroyed by the Great Salem Fire of 1914.
2017 40 minutes ago 10 control points
A memorial of the town of hampstead 2c new hampshire. historic and genealogic sketches  281903 29  2814577151507 29 abkmhzcw
2017 about 2 hours ago 1 control point
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Recent Mosaics

Mosaic Title Year Last Updated Number of Maps Percentage Complete
Missing especie en amenaza
oso de anteojos en estado vulnerable Compiled by yalena. Links: Source / Biblio Ref
2017 2 days ago 0 maps 0%
(0 maps)
1955 boston vkf00 5 1955 Boston USGS Aerial
Compiled by Elad Horn. Download KML
2 days ago 5 maps 100%
(5 maps)
Sfnf mvum south Santa Fe Natl. Forest MVUM
Compiled by K S. Download KML
4 days ago 6 maps 100%
(6 maps)
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