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
Py cerrito comprim
2017 about 2 hours ago 12 control points
2017 about 2 hours ago 9 control points
G7654 b8 1919 s9 1
1919 about 3 hours ago 4 control points
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Recent Mosaics

Mosaic Title Year Last Updated Number of Maps Percentage Complete
Jpeg 1930.xx.xx aerial143 ward21and22 plate25and26 1930 Boston Planning Aerial In Progress
00m380 Large project to combine over 600 aerial photos from the Boston Planning and Development Agency's archives. Compiled by Mapjunction. Download KML
1930 2 days ago 4 maps 100%
(4 maps)
Palosverdes colorado parks
Compiled by Jeremy S. Download KML
3 days ago 144 maps 99%
(142 maps)
Missing test
Compiled by Zia-M.
3 days ago 0 maps 0%
(0 maps)
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