Map Warper

Log In Create Account


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

Search for

browse all maps

Last Rectified Maps

Map Title Year Last Updated Status
2017 about 2 hours ago Unrectified
Tullamore Estate, Doncaster, Victoria, Australia 3108
2017 about 9 hours ago 4 control points
Candia lot
Subdivision for sale. Wanting to see it in context.
2017 about 16 hours ago 3 control points
See all maps

Recent Mosaics

Mosaic Title Year Last Updated Number of Maps Percentage Complete
Ca000012 DeKalb County, IL 1929 Plat
Compiled by Eva Johnson. Links: Source / Biblio Ref Download KML
1929 4 days ago 18 maps 100%
(18 maps)
1874 west roxbury boston hopkins and co. atlas 00m1   plate a 1874 West Roxbury, Boston, Hopkins and Co. Atlas
1874 West Roxbury, Boston, Hopkins and Co. Atlas 00m1__ ATLAS Photoshopped / Aligned for Mapjunction by Rory McCarthy on - Atlas of the County of Suffolk, Massachusetts, Vol.5th, West Roxbury, Boston. G.M. Hopkins & Co., 1874 Compiled by Mapjunction. Links: Source / Biblio Ref Download KML
4 days ago 17 maps 100%
(17 maps)
Basecarto mymosaic
Compiled by Geoizzo. Download KML
2017 8 days ago 2 maps 100%
(2 maps)
View all Mosaics
Create a new mosaic