Bricks for a Urban Location Aware System

I am using different positioning techniques (GPS, WiFi and GSM) to investigating the fluctuating location quality and timeliness experienced in a large-scale coverage such as the Barcelona urban area.

(from left to right) Using a homemade S60 Application to collect GSM fingerprints in specific POI such as metro stations, WiFi map (courtesy of Yuji Yoshimura, Agencia d`Ecologia Urbana de Barcelona), GPS drifts in of of the many compact low-rise buildings area of Barcelona.

Relation with my thesis: toying around to come up with design ideas and contexts for their implementations.