This book constitutes the refereed conference proceedings of the 12th International Symposium
W2GIS 2013 held in Banff Canada in April 2013. The 11 revised full papers and 5 short papers
presented were carefully selected from 28 submissions. The program covers a wide range of
topics including Spatial Semantics and Databases Location-based Services and Applications
Trajectory Representation and Sensor Web Spatial Analysis and Systems and Map Generation and
Modeling.
