OpenGeoscience (UK)

"OpenGeoscience is a new web service that provides geological maps for the whole of Great Britain, images from its extensive collection of photographs and a wide range of other digital information - all for free. The British Geological Survey has been making geological maps of the UK for 175 years and this is the first time maps of such detail will be made freely available using the internet. These maps are based on the standard BGS geological map at a scale of 1:50,000. This enables resolution of geological details to about 50 metres on the ground - essentially street-level - a world first in terms of releasing country-wide information at street-level scale"