Professor of urban planning, Amy Hillier, recently spoke at TEDxPhilly to talk about how data visualization technology can map a city’s emotions and memories. Geographic Information System (G.I.S.) technology has become more commonplace and allows statistics to be easily mapped, but in this article, "Mobile Technology: Mapping a City's Emotions, Memories," Hillier argues that we can go one step further. By using data visualization to map the city that isn’t visible to the eye (i.e. sewage system, water pipes, and other underlying infrastructure), it can be used as an experiential tool. She gives an example of two children living in different neighborhoods whose experiences can be quantified by mapping where they eat, where they go for entertainment, and average household income. The hope is that using the technologies in this way can change our environment for the better.