Click here to skip to content

Help us place our digitised maps

Are you interested in local history and old maps? Would you like to explore historic places across the globe? If so, you can help the British Library. You can quickly create an overlay of historic maps on current mapping and compare the past with the present.

The fourth release of BL Georeferencer, in which we asked the public to identify the locations of nearly 2,800 scanned historic maps, has been completed. The names of participants have been credited on this site, and the British Library would like to thank these individuals for all the time and research contributed. In many cases, a great deal of detective work was required to solve the puzzles of geography and interpret historical changes to the landscape!

The top contributor of this latest release of historic maps was Dr Susan Major, who added over 10,000 control points. Read more about the BL Georeferencer project and the historic mapping.

Here's how it works...

See a video explanation of how to use BL Georeferencer

For questions about the project, or to ensure that you are notified when more maps become available for georeferencing, contact

Progress Bar

British + Irish towns: fire insurance plans

Military maps: World War I and US Civil War

Klokan logo