OSMers were invited to run a mini mapping party at Brixton Market as
part of a tech themed event, which in turn is part of the wider
project called Spacemakers Brixton. Passersby were able to mark
improvements on the map with pins and yarn.
http://wiki.openstreetmap.org/wiki/Spacemakers_Brixton_mini_mapping_party
Brixton pin map is by Ciarán Mooney http://www.flickr.com/photos/20156581@N03/
and licensed cc-by-sa http://creativecommons.org/licenses/by-sa/2.0/deed.en