At work we got an i-gotU (a GPS logger) as a Christmas present. To show what one can do with it I decided to ask a few people to use their i-gotU to record their travels for two weeks. This resulted in over 42000 locations done by 8 different persons. Each person got his/her own color in the visualization to be able to see when people were near one another. Since the office is in Amsterdam and most people live in (different parts of) Amsterdam you can quickly see the contours of Amsterdam’s city-plan appear. Also interestingly is to note that people have their own specific areas where they spend most of their time.