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
2019 3 minutes ago 9 control points
K0bic55vmg4 hursiqte
1959 19 minutes ago 76 control points
1968 dublin half inch sheet 16 ne crop
IRL DUBLIN half inch 1968 part sheet 16
1968 about 1 hour ago 11 control points
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Recent Mosaics

Mosaic Title Year Last Updated Number of Maps Percentage Complete
Calabogie to bancroft CLUPA
Compiled by Xavier Bourque. Download KML
1 day ago 7 maps 100%
(7 maps)
14 wv sanborn 1931 Sanborn Fire Insurance Map from Waterville, Maine 1931 #28
Sanborn Fire Insurance Map from Portland, Cumberland County, Maine. Compiled by Wardecker. Download KML
1931 2 days ago 1 map 100%
(1 map)
Nypl.digitalcollections.510d47e2 15fc a3d9 e040 e00a18064a99.001.g Brooklyn Vol 1 1908 Bromley
G.W. Bromley & Co. (Publisher) Bromley, George Washington (Author) Bromley, Walter Scott (Author) Collection Atlases of New York City Brooklyn Atlas of the borough of Brooklyn, City of New York: from actual surveys and official plans Volume One Dates / Origin Date Issued: 1908 Place: Philadelphia Publisher: G.W. Bromley & Co. Compiled by AlanL. Download KML
1908 3 days ago 47 maps 100%
(47 maps)
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