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!


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

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

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Last Rectified Maps

Map Title Year Last Updated Status
Usa m389 95
2017 16 minutes ago 26 control points
Plymouthoverlay 1w8n8bz
Aligned for by Bill Warner How do we know where to dig? June 25, 2014 by ericjohnson002 | 0 comments Good question. Luckily, historical archaeologists have a lot of resources to help us out. Long before the team opened excavations on the perimeter of Burial Hill, we collected old maps and conducted geophysical surveys to help us determine the precise coordinates of each excavation unit.
1621 about 2 hours ago 3 control points
Usa m389 93
2017 about 2 hours ago 25 control points
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Recent Mosaics

Mosaic Title Year Last Updated Number of Maps Percentage Complete
Charles river depth map crab 1 2016 Charles River Depth Map CRAB
Uploaded for ...... ...... by Nebojsa Pesic ........ Overview of The Charles River Alliance of Boaters and MIT Sea Grant Chart the Charles River ........ ....... CRAB and MIT Sea Grant Chart of the Charles River ........ ........ Online Map in Google Maps: ........... .......... Online ARCgis Map....... ............. Download KML file for Google Earth: ......... ......... PDF wall chart (note that the map appears to be distorted!) Compiled by Mapjunction. Links: Source / Biblio Ref Download KML
2016 about 1 hour ago 7 maps 100%
(7 maps)
Missing especie en amenaza
oso de anteojos en estado vulnerable Compiled by yalena. Links: Source / Biblio Ref
2017 4 days ago 0 maps 0%
(0 maps)
1955 boston vkf00 5 1955 Boston USGS Aerial
Compiled by Elad Horn. Download KML
5 days ago 5 maps 100%
(5 maps)
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