Map Warper

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Update July 2021: Ran out of disk space, again. Downtime will happen again. Please try to delete your maps (edit tab) after you are done with them for other users.


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!

Upload Map!

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!


Internationalization (i18n) and Translations for Mapwarper. (English, Dutch, Japanese)
Many thanks to Ellen Gehring of Erfgoed Leiden en Omstreken for the Dutch translations. Ellen with the ELO wanted their own warper and because of this, support for locales, internationalisation and... read more

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

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Last Rectified Maps

Map Title Year Last Updated Status
Dina0 wasser schmalwiesen page 0001
2015 less than a minute ago 6 control points
Seki closureareas 8x11 letter portrait 20211018 reduced yzeawbuj
(In 1 layer)
2021 about 1 hour ago 3 control points
246996476 656165185812154 6856396328735534585 n
Serbia Donja i Gornja Tresnjica sa vidikovac Boskovac
2021 about 1 hour ago 4 control points
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Recent Mosaics

Mosaic Title Year Last Updated Number of Maps Percentage Complete
Fseprd954834 Sequoia fire closures
Compiled by Matt Trent. Download KML
about 1 hour ago 5 maps 100%
(5 maps)
Missing PVLIV
Compiled by KONSTANTINOS MICHALOPOULOS. Links: Source / Biblio Ref
2021 3 days ago 0 maps 0%
(0 maps)
1zc3760090471 upstate NY, 1952 Aerial
imagery from a 1952 Aerial Imagery Pass from USGS earth explorer Compiled by Richard Welty. Download KML
1952 7 days ago 47 maps 100%
(47 maps)
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