Having tracked myself for several weekdays I realized that the path I am taking every day is virtually identical, thus I decided to visualize data from the only day of past week which followed a different route, a saturday. While the data set that I was able to extract from iPhone app MyTracks was rather scarce( it did not have any altitude information, readings were taken rather sporadically even at 30-second track pace, it did show quite accurately the essence of the route I followed. The route is not repeating itself, as it reflects my movement on a bike around the central part of Barcelona, with the most time spent nearby Placa Catalunya where I also did some off-bike activities.   Through this self-tracking exercised I have learned several things: \ it is worth purchasing apps to collect consistent clean data rather than using free software \ frequency of data sample collection must be thoroughly correlated with the means of transportation used the most \ the absence of Z-coordinate in the data set takes away from understanding ones movement in a city with great topography like Barcelona