This design-based research aims to propose a location-based urban media related to socio-technological factors through investigating the relationship between physical structure and non-physical factors in city spaces.

Historically, topography has been one of essential parts for the formation of urban structure. Streets and plazas, core elements of urban structure, have been subjected to topography and played significant roles as communicative space in our daily life. These days, with the development of new technology, our perception of space has extended to new domains. One of new domains can be described as the interweaved relationship between urban structures and technological factors relevant to communication. It will be investigated through variations in an amount of traffic from mobile phones. That is because a mobile phone is one of the indicators of technological factors closely related to modern daily life and is one of digital media device. The urban communication structure will be represented as contour lines according to an amount of traffic so that the invisible factor could become compatible with the topographical configuration in a city space. Therefore, between physical and intangible topography, the rhythm of communication behavior and its territorialisation will be investigated and a new communicative domain that can be media for itself can be suggested.

This urban media concept by the methodology above makes us recognize a new medium domain by telecommunication and create a multiplicity of tangibly as well as intangibly interactive design factors about urban tissue and structure in contemporary city. Furthermore the concept of urban media based on location could be a basis for planning new technology-related city works such as 'ubiquitous' city.