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!

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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
510d47e2 142f a3d9 e040 e00a18064a99.001.g
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. (In 1 layer)
1908 about 1 hour ago 3 control points
Agdm 26919 full
2023 about 3 hours ago 18 control points
Maps pages 2and3 bmgwishk
1778 about 5 hours ago 120 control points
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Recent Mosaics

Mosaic Title Year Last Updated Number of Maps Percentage Complete
Plate55l Denver 1890 Sanborn
1890 Sanborn Atlas of Denver Volumes 1 and 2 Compiled by Dennis. Links: Source / Biblio Ref Download KML
1890 about 7 hours ago 46 maps 100%
(46 maps)
03c 8848 130 00 pp breziniai 03 pp  1 LTKK130-PP_115+60–309+57
Compiled by Chris. Download KML
2023 2 days ago 6 maps 33%
(2 maps)
Citify birzisku ir m. riomerio g. 01 KUN-Biržiškų-ir-M-Riomerio-g-PP
Compiled by Chris. Download KML
2018 3 days ago 3 maps 100%
(3 maps)
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