Maps and views blog

26 October 2012

Chance to georeference maps online!

It was only this morning that a new set of 700 maps was opened to the public for georeferencing, but this afternoon I am overwhelmed at the interest we've received. Participating individuals examined the scanned maps closely - many of which were not easy to decipher, being of an earlier and more "characterful" sort - and, using an online gazetteer and map, found and assigned their locations. Amazing.

There is plenty left to do. Please give it a try!

Screenshot for instructions
Once a map has been georeferenced with this tool, it may be viewed overlaid on the landscape, and each participant is credited for the number of points they submit.  

But it is not all about immediate gratification and competition! Georeferencing these maps extends their usability and findability, and allows visualisation in new ways using popular geospatial tools. The British Library has tremendous collections of historic maps that, without georeferencing, lack visibility via digital technologies, so we decided to crowd-source the activity. All the data created from this effort will be used for enhanced searching; the results of our initial pilot (thanks to those volunteers) have already been applied in Old Maps Online ( and we have plans for our own uses.