Fifth International Terra Cognita Workshop 2012


The wide availability of technologies such as GPS, map services and social networks has resulted in the proliferation of geospatial data on the Web. In addition to material produced by professionals (e.g., maps), the public has also been encouraged to make geospatial content, including their geographical location and a record of their outdoor activities, available online. The volume of such user-generated geospatial content is constantly growing. Similarly, the amount of data extracted from the Web and published as Linked Open Data is increasing. Linked Open Data include many data sets with geospatial properties such as coordinates, feature class or topological relations.

The geo-referencing of Web resources and users has given rise to various services and applications that exploit it. With the location of users being made available widely, new issues such as those pertaining to security and privacy arise. Likewise, emergency response, context sensitive user applications, and complex GIS tasks all lend themselves toward solutions that combine both the Geospatial Web and the Semantic Web.

The workshop will bring together researchers and practitioners from various disciplines, as well as interested parties from industry and government, to advance the frontiers of this exciting research area.

Keynote Speakers

  • Matthew Perry (Oracle Corp., Nashua, NH, U.S.A.) : Keynote title: The GeoSPARQL OGC standard
  • Ralf Moeller (Hamburg University of Technology, Germany): Keynote title: Evaluation of a Perfect Rewriting Algorihm for Ontology Based Query Answering over Spatial Databases


  • Dave Kolas (Raytheon BBN Technologies)
  • Matthew Perry (Oracle)
  • Rolf Grütter (Swiss Federal Institute for Forest, Snow and Landscape Research)
  • Manolis Koubarakis (National and Kapodistrian University of Athens)