Map Warper

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Update Sept 2022: Uploads temporarily disabled. No space left, again.
To help free up space, I removed a few files, so you may need to re-rectify (and/or crop) a map if you can't see it in the maps Preview tab.
Also a few maps which were old, untouched and never rectified, with no points on them and without belonging to a mosaic were removed, so you might need to re-upload.


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
Map showing the county boundaries in color. Prime meridians are Greenwich and Washington D.C.
1865 about 3 hours ago 4 control points
Mke 1923 final
Near West Side Project
1923 about 3 hours ago 25 control points
1923 am000316 polonia detail
about 4 hours ago 88 control points
See all maps

Recent Mosaics

Mosaic Title Year Last Updated Number of Maps Percentage Complete
196 se 15 1968 Hong Kong 70s
Collection of latest out-of-copyright topographic maps in Hong Kong Compiled by Download KML
1971 6 days ago 118 maps 100%
(118 maps)
Susquehannock trail system  north STS
Compiled by George. Download KML
7 days ago 2 maps 100%
(2 maps)
04 d1 michaux s f atv 8 PA DCNR ATV Trails
Compiled by Philip Jenks. Download KML
11 days ago 3 maps 100%
(3 maps)
View all Mosaics
Create a new mosaic