Map Warper

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Update July 2020: Ran out of disk space. Maps older than 2 years will need re-warping to work. Downtime will happen again.


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
Heliconia distribution plantsoftheworld
Map showing regions where heliconia is native green and introduced purple. POWO 2019. "Plants of the World Online. Facilitated by the Royal Botanic Gardens, Kew. Published on the Internet; Retrieved 29 September 2020."
2019 about 2 hours ago 9 control points
Usgs gq478 1 projectrasterclip
TITLE = Geologic map of the Deep Lake quadrangle, Park County, Wyoming AUTHORS = Pierce, W.G. PUBLISHER = U.S. Geological Survey SERIES NAME = Geologic Quadrangle Map SERIES NUMBER = GQ-478 PUBLICATION DATE = 1965 SCALE = 1:62,500 URL = /Prodesc/proddesc_13113.htm
1965 about 2 hours ago 9 control points
10 werst karte l6  1922  144
2020 about 4 hours ago 3 control points
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Recent Mosaics

Mosaic Title Year Last Updated Number of Maps Percentage Complete
3 sw 18d 201905 HKG
Compiled by Download KML
about 12 hours ago 51 maps 100%
(51 maps)
Worcester 1922 plate 01 The 1922 Richards Atlas Map of the City of Worcester, MA
Plates assembled Compiled by Kathleen Morrill. Download KML
1922 9 days ago 19 maps 100%
(19 maps)
Missing beacon hills
Compiled by nnoemi. Links: Source / Biblio Ref
17 days ago 0 maps 0%
(0 maps)
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