Robin Wilson, a PhD student at the University of Southampton made a very interesting page that contains a categorised list of links to over 300 sites providing freely available geographic datasets – all ready for loading into a Geographic Information System.

He said in his website :

I kept coming across GIS datasets online that looked like they might be useful – for my research, my friends research, or just for fun! I thought I’d keep a list of the ones that looked good – and then decided to put it online so that other people could benefit from it too. Fast-forward a few months and this is what you have: over three-hundred links, and hundreds of hits per day.

That is the link to Robin’s website : http://freegisdata.rtwilson.com