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. Developed, hosted and maintained by Tim Waters, this project is supported by Topomancy LLC and the New York Public Library.

Mail me at for more information!


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

Mapwarper Tutorial & Spatial Humanities Workshop by Lincoln Mullen
Lincoln Mullen has written a great series of workshops on the Spatial / Digital Humanities over five days. Day 3 is focused around Georectification with and is a very... read more

Doing Digital History 2016 – Map Warper Tutorial
Doing Digital History 2016 is a two week Summer institute sponsored by National Endowment for the Humanities and was held at George Mason university in DC/Arlington earlier in the year.... read more

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Last Rectified Maps

Map Title Year Last Updated Status
1916 am001549 polonia detail
2 minutes ago 53 control points
Atlas mass haverhill 1892 006 9461711300 o
1892 Haverhill and Bradford Walker Atlas 00m063 Aligned for Mapjunction by Nebojsa Pesic on
about 2 hours ago 9 control points
Fmapoteca 1373 fmb 12
about 4 hours ago 7 control points
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Recent Mosaics

Mosaic Title Year Last Updated Number of Maps Percentage Complete
1955 boston vkf00 5 1955 Boston USGS Aerial
Compiled by Elad Horn. Download KML
4 days ago 5 maps 100%
(5 maps)
Missing iran
Compiled by hamidreza20.
6 days ago 1 map 0%
(0 maps)
Lawrence 1926 1b 1926 Lawrence, MA
Maps taken from 1926 Atlas of Lawrence, MA. Owned by State Library of Massachusetts. Compiled by Colby Lipscomb. Download KML
7 days ago 4 maps 100%
(4 maps)
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