Map Warper

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Space update: Freed up some space. Some maps might need to be re-warped - 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!

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
Egmore tif
2019 18 minutes ago Unrectified
Nungambakkam tiff2
2019 about 1 hour ago 42 control points
L tm 22 2018
2018 about 7 hours ago 4 control points
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Recent Mosaics

Mosaic Title Year Last Updated Number of Maps Percentage Complete
Getpreviewfile Hong Kong 60s
Collection of latest out-of-copyright topographic maps in Hong Kong Compiled by Download KML
1968 about 6 hours ago 62 maps 100%
(62 maps)
Arlington 101 1875 Beers Middlesex
Compiled by Mapjunction. Download KML
1875 about 20 hours ago 6 maps 100%
(6 maps)
3 sw 18d 201905 HKG
Compiled by Download KML
7 days ago 11 maps 100%
(11 maps)
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