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
Fig 02
2018 6 minutes ago 7 control points
2018 19 minutes ago Unrectified
Plate 4
Atlas of the city of Springfield and the town of Longmeadow, Massachusetts (In 1 layer)
1910 43 minutes ago 6 control points
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Recent Mosaics

Mosaic Title Year Last Updated Number of Maps Percentage Complete
Plate 1 1910 Springfield Richards Atlas
Compiled by John. Download KML
42 minutes ago 4 maps 100%
(4 maps)
008 Shawinigan,Canada, 1955
City of Shawinigan Quebec Canada Mosaic made from 1955 city fire dept topo map Compiled by michel leard. Download KML
1955 3 days ago 13 maps 100%
(13 maps)
Cp20763 Street Map Amendment Rectifications Compiled by Matt Gardner. Download KML
7 days ago 4 maps 100%
(4 maps)
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