On Good Friday, April 2nd 2010, Ordnance Survey launched OS OpenData. This brilliant new mapping technology allows you to create your very own innovative applications using Ordnance Survey mapping.
As with Google Maps, you can add pointers, markers, highlight regions, draw polygons and a whole lot more with the Ordnance Survey OpenData mapping service. I have written a simple application on LambWatch which plots a few points on an O.S. map and also assigns HTML "bubbles" to them. Check out Walks in Earby via the LambWatch site for a simple example of how the Ordnance Survey map can be integrated into a website (you will need to agree to keep dogs on leads before you can view the map though!)
Integration of O.S. mapping into your application is not restricted to a website either.... You can download entire map images for use in whatever application you are building, be it desktop, flash, anything!! Check out what kind of Ordnance Survey mapping you can download into your application on the OS OpenData Map Supply page!
Watch this space..... If I am any judge, I can just imagine that right now, the techies at Google are frantically beavering away to add this O.S. data as an "overlay" option to their mapping feature. Just like you can overlay satellite imaging, you will soon be able to overlay O.S. data. You saw it here first!!