Coinciding nicely with GIS Day 2013 the British Library's Lead Curator of Digital Mapping Kimberly Kowal has just released online the biggest batch yet of digitised maps needing georeferencing: 2,700 of them! 

She explains, "We're asking the public to help "place" them, ie identify their locations by assigning points using modern mapping. It can be a challenge, but it is an opportunity to discover familiar areas as they existed around one hundred years ago." 

Read more about it over on the British Library Maps & Views Blog.

Or just dive right in and get georeferencing!