WP 2 – Semantics based geospatial data management

The main objectives covered in this workpackage are:

  • Adaptive data organization: Geospatial operations exhibit a high degree of locality in access which may be translated into physical data layout by clustering identifiers of geometries and their thematic content by geospatial location. This means that data access patterns will be local, resulting in improved CPU-memory traffic patterns and in decreased inter-node communication on clusters.
  • Integration of complex geospatial algorithms into the database kernel: Examples of these would be route planning or map comparison/conflation. These typically involve graph-like traversal of linked structures, e.g. road network with highly local and highly repetitive access patterns, thus benefiting from a special memory-based data representation for often reused intermediate results.
  • GeoSPARQL standard compliance: The existing implementation is very close to GeoSPARQL, thus this is mostly a matter of renaming functions and predicates.
  • Data modelling with possible engine-level support for provenance or versioning: We expect such meta-information to be necessary in a heterogeneous melting pot of geodata.

Along with these objectives we will ensure fast searching, retrieval and display of the spatial data over the web. This involves different zoom levels, both in a spatial sense and in a semantic sense, i.e. hierarchical searches based on e.g. tourism taxonomies, depending on the use cases. Accurate query cost estimation is a key for this functionality, along with possible reuse of intermediate results.


T2.1 State of the Art in geospatial and semantic data management
T2.2 Integration with external geospatial databases
T2.3 Geospatial query optimization
T2.4 Geospatial clustering
T2.5 Distributed geospatial capabilities
T2.6 Geospatial problem solving
T2.7 Exposing INSPIRE data as Linked Data

Hosted by

Universität Leipzig , InfAI: Institut für Angewandte Informatik

Funded by

EU Seventh Framework Programme (FP7)

Community and Social Media



EDF2015 and Linked Data Europe: Big Geospatial Data Workshop ( 2015-11-24T23:46:33+01:00 Alejandra Garcia Rojas)

2015-11-24T23:46:33+01:00 Alejandra Garcia Rojas

In 2015, the European Data Forum took place in Luxembourg on the 16th and 17th November. GeoKnow team had the pleasure to be present at the event with a booth for showing GeoKnow results. The conference welcomed over 700 participants from industry, research, policy makers, and community initiatives form all over Europe. Read more about "EDF2015 and Linked Data Europe: Big Geospatial Data Workshop"

Linked Open Data Switzerland at SWBI2015 ( 2015-10-12T09:56:15+02:00 Daniel Hladky)

2015-10-12T09:56:15+02:00 Daniel Hladky

Daniel Hladky from Ontos presented GeoKnow at the SWBI2015 conference two talks. The first talk was the keynote on October 7, 2015 with the title “Linked Data Service (LINDAS): Status quo of the Linked Data life-cycle and lessons learned“. Read more about "Linked Open Data Switzerland at SWBI2015"

FAGI-gis: fusing geospatial RDF data ( 2015-10-05T13:08:20+02:00 Giorgos Giannopoulos)

2015-10-05T13:08:20+02:00 Giorgos Giannopoulos

GeoKnow introduces the latest version of FAGI-gis, a framework for fusing Linked Data, that focuses on the geospatial properties of the linked entities. Read more about "FAGI-gis: fusing geospatial RDF data"

GeoKnow Public Datasets ( 2015-09-19T16:15:29+02:00 Alejandra Garcia Rojas)

2015-09-19T16:15:29+02:00 Alejandra Garcia Rojas

In this blogpost we want to present three public datasets that were improved/created in GeoKnow project. LinkedGeoData Size: 177GB zipped turtle file URL: http://linkedgeodata.org/ LinkedGeoData is the RDF version of Open Street Map (OSM), which covers the entire planet geospatial data information. Read more about "GeoKnow Public Datasets"

GeoKnow at Semantics 2015, Vienna ( 2015-09-18T15:12:48+02:00 Alejandra Garcia Rojas)

2015-09-18T15:12:48+02:00 Alejandra Garcia Rojas

Several partners of GeoKnow were present this year at the Semantics conference 2015. The previous day of the conference we organised a workshop about the work done during these last three years in GeoKnow. Read more about "GeoKnow at Semantics 2015, Vienna"