Lately I have begun contributing to the OpenStreetMap project. I guess you can think of it as a sort of Wikipedia but with the intent being to create free maps rather than a free encyclopedia. Working on OSM is lots of fun for me since one of the primary means of creating the raw data used to trace roads is by collecting GPS tracks. Basically the procedure I use is to go for a bike ride with the GPS running and taking plenty of photos of street signs. Back home I correlate the photos with the GPS track to easily see the geographic position of each photo. Finally, I load the track and photos into the JOSM mapping software where I can use the track and photos to create roads with correct names. It is also possible to map positions of libraries, sporting facilities, bus stops, and lots more.
The visual impact of your work is also quite satisfying. For example, compare the before and after images of the mapping I did of the village Stångby earlier today:
I bet people who see me photographing street signs think I’m a bit crazy. I don’t mind though, I live to entertain 
