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
Wh 24 1837 1912 1959 ballymore
IRL Westmeath sheet 24 Ballymore 1913 6inch (In 1 layer)
2018 2 minutes ago 12 control points
Wh 25 1837 1912 1963
IRL Westmeath sheet 25 Lough Ennell West 1912 6inch (In 1 layer)
1912 8 minutes ago 7 control points
Wh 26 1938 1912 lough ennell e
IRL Westmeath sheet 26 Lough Ennell East 1912 6inch (In 1 layer)
1912 15 minutes ago 4 control points
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Recent Mosaics

Mosaic Title Year Last Updated Number of Maps Percentage Complete
Wh 4 1837 1911 rgb Westmeath 1911 O.S. 6 inch
Westmeath 1911 O.S. 6 inch sheets Compiled by Brian Hollinshead. Links: Source / Biblio Ref Download KML
1911 about 4 hours ago 17 maps 94%
(16 maps)
Irl gsgs 3906 20 23 nw athlone Westmeath GSGS 3906
Westmeath GSGS 3906 sheets which include County Westmeath. Compiled by Brian Hollinshead. Links: Source / Biblio Ref Download KML
1 day ago 20 maps 100%
(20 maps)
Ndwanderung2017 mosaic
test Compiled by ischl254. Download KML
4 days ago 1 map 100%
(1 map)
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