Map Warper

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Sorry! The server has no disk space left, so you'll probably experience some trouble logging in or uploading. I'm also on vacation at the moment but will fix everything when I return. - Tim Okay


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!


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
Perkiomen skippack 1893
Land owners in Skippack and Perkiomen Township, Montgomery County, PA, in 1893.
1893 about 2 hours ago Unrectified
03825 1885 0008
2019 about 6 hours ago 28 control points
03825 1885 0007
2019 about 6 hours ago 6 control points
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Recent Mosaics

Mosaic Title Year Last Updated Number of Maps Percentage Complete
Kreuter 103 Kreuter-Karten
Compiled by Simon. Download KML
1840 about 22 hours ago 8 maps 100%
(8 maps)
1888 cambridge sanborn plate 1 2 2cc 1888 Cambridge Sanborn Atlas
Title Sanborn Fire Insurance Map from Boston, Suffolk County, Massachusetts. Created / Published Sanborn Map Company, Vol. 6, 1888 Notes - Vol. 6, 1888. - 79 Sheets. - Double-paged plates numbered 182-219. Bound. Repository Library of Congress Geography and Map Division Washington, D.C. 20540-4650 USA Digital Id Language English Online Format image Description Vol. 6, 1888. 79 Sheets. Double-paged plates numbered 182-219. Bound. IIIF Presentation Manifest Manifest JSON/LD Compiled by Mapjunction. Links: Source / Biblio Ref Download KML
1888 2 days ago 58 maps 100%
(58 maps)
No.1 Tibet geology 1-6
Compiled by Katherine Zhang. Download KML
15 days ago 6 maps 100%
(6 maps)
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