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
Atwood map of usa 1851c
Map Of The United States, Canada, Mexico, Central America, and the West India Islands With a Portion of Venezuela & New Granada; Showing the routes overland and by the Isthmus to California and Oregon, Also the new Boundaries of California, Utah, & New Mexico, Compiled from the latest Authorities. Engraved & Published By J.M. Atwood, No. 19 Beekman Street, New York. 1851. D. McLellan, Printr. Spruce St ... Entered ... 1851, by J.M. Atwood ... New York.
1851 12 minutes ago Unrectified
Nordsteimkehehlingen uebersichtsplan 1
2018 about 2 hours ago 13 control points
65 map of kittery
This map is from the York County Atlas published 1872. Page 65: Map of Kittery. Map retrieved from DigitalMaine repository.
1872 about 14 hours ago 4 control points
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Recent Mosaics

Mosaic Title Year Last Updated Number of Maps Percentage Complete
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)
Plate 1 1910 Springfield Richards Atlas
Compiled by John. Download KML
5 days ago 3 maps 100%
(3 maps)
Cp20763 Street Map Amendment Rectifications Compiled by Matt Gardner. Download KML
7 days ago 4 maps 100%
(4 maps)
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