This book constitutes the refereed proceedings of the Third International Symposium on Location- and Context-Awareness, LoCA 2007, held in Oberpfaffenhofen, Germany, in September 2007.

The 17 revised full papers presented were carefully selected during two rounds of reviewing and improvement from 55 submissions. The papers are organized in topical sections on wifi location technology, activity and situational awareness, taxonomies, architectures, and a broader perspective, the meaning of place, radio issue in location technology, and new approaches to location estimation.