© OpenSteetMap Contributors and CC Tim Waters
These lines are made up of tiny dots which are overlaid in places. The dots make up a trail by an individual, which can be seen when zooming into the map online. Each dot represents the moment when the GPS picked up a signal of that individual’s location. The darker the line, the more people have carried out this process while walking that particular route. Speed is indicated by a greater gap between dots. Pauses appear as a density of dots. The GPS device might indicate a route taken on a cycle or, also, in a car.
What is interesting about the above map is that no map outline is included in the image, nevertheless the outline of the campus appears in the accumulation of dots, as you can see by looking at this map which is taken from the Chamberlin, Powel and Bon Development Plan.
© University of Leeds and Chamberlin, Powell and Bon
This map (and the previous one on Blue Plaques) show the infinite possibility for cartographies to become ways of presenting personal and qualitative information while also handing over a degree of control of the mapping process and end result to the user/cartographer. The open source software that is often used for these types of collaborations also, to a large extent, disengages it from capitalist production and, hence, provides much more freedom of expression, production and distribution.
Open Source Mapping: Blue Plaques on Campus