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
5578 dramatal 1933
1933 Zbroslawice (In 1 layer)
1933 34 minutes ago 14 control points
5678 hindenburg 1934
Zabrze 1934 (In 1 layer)
1934 38 minutes ago 13 control points
5579 tarnowitz mz 1940
1940 Tarnowskie Góry (In 1 layer)
1940 about 1 hour ago 9 control points
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Recent Mosaics

Mosaic Title Year Last Updated Number of Maps Percentage Complete
5678 hindenburg 1934 Messtischblatt
Mapy topograficzne Messtichblatt 1933-1940 Compiled by SQ9NIT. Download KML
about 1 hour ago 4 maps 100%
(4 maps)
Img 2032 1983 Citywide Aerial Photo
00m391 1983 Citywide Aerial Photo Aligned for Mapjunction by Anastasia Lavrenteva on Compiled by Mapjunction. Links: Source / Biblio Ref Download KML
about 3 hours ago 2 maps 100%
(2 maps)
19670815 aerialphoto 1402 25 1965 Boston Downtown BPDA Aerials
00m385 1965 Boston Downtown BPDA Aerials Aligned for Mapjunction by Anastasia Lavrenteva on Compiled by Mapjunction. Download KML
1965 about 6 hours ago 5 maps 100%
(5 maps)
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