Map Warper

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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
Screenshot 2024 06 20 16 59 14 664
2024 about 2 hours ago 3 control points
 %ec%b6%a9%eb%82%a8 %ed%83%9c%ec%95%88  %ec%84%9c%eb%b6%80%eb%b0%9c%ec%a0%84 %eb%b3%b8%ec%82%ac transparent mosaic group1 downsizing
2024 about 4 hours ago 23 control points
Afplx m0041 racxubth
1870 about 4 hours ago 3 control points
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Recent Mosaics

Mosaic Title Year Last Updated Number of Maps Percentage Complete
83102 202301 14 2023 369 HKG
Compiled by Download KML
about 5 hours ago 25 maps 100%
(25 maps)
Nypl.digitalcollections.a1e93824 8d4c 50ee e040 e00a180619ed.001.g 1911-Bronx NW
Atlas of city of New York Borough of the Bronx. Sections 11, 12 & 13. From actual surveys and official plans by George W. and Walter &. Bromley, Civil Engineers Compiled by AlanL. Links: Source / Biblio Ref Download KML
1911 2 days ago 23 maps 100%
(23 maps)
Nypl.digitalcollections.a1e92cd8 5985 23d4 e040 e00a18061d5c.001.g Bronx Vol. 1 (1911)
Atlas of the city of New York : Borough of the Bronx ... from the actual surveys and official plans [1911-1913] Bronx Vol. 1 (1911) Date Issued: 1911 Publisher: G.W. Bromley & Co. G.W. Bromley & Co. (Publisher) Bromley, George Washington (Cartographer) Bromley, Walter Scott (Cartographer) Compiled by AlanL. Download KML
1911 3 days ago 25 maps 100%
(25 maps)
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