Nowadays there is abundant geospatial information on the web. However most of this information lacks the semantic notation that would permit software mechanisms to easily integrate heterogeneous data sources in complex analyses. In this paper we introduce an architecture designed to achieve this goal by using semantic web technologies. Our system has a client-server architecture, it uses GeoTools and Protege APIs to combine multiple spatial data sources into an ontology. The use of these tools enhances our analyses, providing us with reasoning and inference capabilities. Copyright © 2013 SCITEPRESS.