This chapter addresses some theoretical underpinnings of an analytical approach to understanding how location-based media, or urban interfaces, layer urban spaces. It proposes that the analysis of media artworks, installations and other locative-based media projects brings different conceptual and theoretical tools to the already growing fields of software studies and the relationship of code and algorithms to cities and the built environment. The way in which the urban, public context is a layer in the design that requires curating, becomes clear when people consider the way this installation like so many locative media or artworks travels. Let us conclude with some thoughts about the implications of the model of curating as an analytical framing concept and frame the features, potential and consequences for a broader notion of cultural curating. As Kitchin and Dodge have argued, the countervalent nature of code/space is directly linked to urban systems, embedded within the built environment, regulating the flows and rhythms of the city.