Mapping Wikipedia is a groundbreaking visualisation of the world mapped according to articles in 7 different languages. The map displays both the global patterns and the vast number of geo-located items. The dataset was produced by the Oxford Internet Institute as part of a project that examines Wikipedia in the Middle East and North Africa.
This is the mySociety cache of OS OpenData, released 1st April 2010, and other related similarly-licensed data, as allowed under the licences.
This website is an essential resource for the precise Global Positioning System (GPS) user in Great Britain. It also contains useful information for ALL users of GPS, both recreational and professional.
The GeoNames geographical database covers all countries and contains over eight million placenames that are available for download free of charge.
Here’s a really useful GPS Coordinate Converter. Geographic coordinates and mental arithmetic aren’t a comfortable fit.
Old-Maps is the UK’s most comprehensive historical map archive comprising site centred historical maps covering England, Wales and Scotland. We provide a complete step by step picture of land use changes that have taken place from the mid-19th Century onwards, from OS County Series, OS Town Plans and post-war National Grid mapping to unique Russian Maps of UK target locations from the cold-war era.
An aerial photograph of Windsor Castle. Splendid!
A useful map of postcode regions (i.e. the first two letters of the postcode).