Vodpod videos no longer available.
Here is a great wiki designed for creating a copyleft map of the world. It’s a user generated, free, editable map that can be used by anybody. All you need is to go for a stroll with a GPS then come home and upload the data to the site, tag it and off you go to being your own Herman Moll.
What’s great is that there is a specific set of tags for historic elements on the map and these can be futher refined if need be. So everyone out there in Sheffield and beyond go and have a go!
(the above video is a rather snazzy rendering of the data contributed over 2008 to OpenStreetMap created by the folks at http://www.itoworld.com/ as found on the infosthetics blog which can be found here.)