Completely unrelatedly, for a while now I’ve been thinking about how to make a free-as-in-freedom map of Edinburgh. Not just the kind of map which you look at, but also a semantic map which computers could process. It would allow route-finding applications – not just finding routes for cars, but also for cyclists who want to avoid busy roads and hills. Another application could tell you where the nearest ATM or pub was. There are hundreds of useful applications, all of which need high-quality semantically-rich maps. But, as far as I can tell, in the UK all of the commonly used maps are derived from Ordnance Survey data which, despite being a sort-of public body, charge royalties for the data.
Now, on one hand, that’s quite reasonable because it takes a lot of effort to make good maps. But, on the other hand, I have a strong feeling that somehow this information ought to be in the public domain. Local people and companies could use this data in all sorts of ways. It ought to be a shared community resource.
So, I’m left wondering how I can use technology to map Edinburgh. Maybe a combination of a digital camera, GPS and a bicycle would be a good way of grabbing useful raw datapoints? Finding existing public domain map data would be a really useful start – satellite images and photos from aircraft. And there was a recent conference about open-source mapping tools. I think I need to do some basic reading about map-making, because quite honestly I don’t know where to start.