This book constitutes the refereed proceedings of the Second International Conference on GeoSpatial Semantics, GeoS 2007, held in Mexico City, Mexico, in November 2007. The papers are organized in topical sections on models and languages for geo-ontologies, alignment and integration of geo-ontologies, ontology-based spatial information retrieval, formal representation for geospatial data, and integration of semantics into spatial query processing.

Constitutes the refereed proceedings of the 4th International Conference on GeoSpatial Semantics, GeoS 2011, that was held in Brest, France, in May 2011.