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.
Here’s a collection of webservices for finding out geographical-related information. There are currently three services available for finding the time zone or local time, the sunrise and sunset times, and the height above sea level at a given latitude and longitude.
The GeoNames geographical database covers all countries and contains over eight million placenames that are available for download free of charge.
With no guarantees to its accuracy, here you can download a list of UK postcode area codes and their grid coordinates. There are now 2821 area codes in the list. Let me know if you think there are any missing area codes.
Here’s a really useful GPS Coordinate Converter. Geographic coordinates and mental arithmetic aren’t a comfortable fit.