Ontologies and Linked Geospatial Data

    One of the important contributions of TELEIOS is the development of Earth Observation ontologies and the publication of relevant linked geospatial data. Currently the following ontologies and datasets have been developed in the project:

  • The DLR ontology. This is an ontology for the Virtual Observatory for TerraSAR-X data that is described in Deliverable D6.2.1 and is available publicly at http://www.earthobservatory.eu/ontologies/dlrOntology.owl.

  • The NOA ontology. This is an ontology for the fire monitoring service of the National Observatory of Athens. The ontology is described in Deliverable D7.2 and is available publicly at http://www.earthobservatory.eu/ontologies/noaOntology.owl.

  • Linked geospatial data. In the course of developing the Earth Observation applications the following data sets were published as linked data by TELEIOS partners:

    • The CORINE Land Cover of Europe dataset. The CORINE Land Cover project is an activity of the European Environment Agency that collects data regarding the land cover of European countries. The project uses a hierarchical scheme with three levels to describe land cover. The first level indicates the major categories of land cover on the planet, e.g., forests and semi-natural areas. The second level identifies more specific types of land cover, e.g., forests, while the third level narrows down to a very specific characterization, e.g., coniferous forests. The dataset is available as an ESRI shape file that is based on this classification scheme. This shape file is transformed in RDF as follows. Every land cover type is represented with a class (e.g., ConiferousForest), and the hierarchy of land cover types is expressed with the respective class taxonomy. For each specific area in the shape file, a unique URI is created and it is connected with an instance of the third level. Additionally, the geometry of each area is represented by a spatial literal.
    • The Urban Atlas of Europe dataset. Urban Atlas is an activity of the European Environment Agency that provides reliable, inter-comparable, high-resolution land use maps for 305 Large Urban Zones and their surroundings (more than 100.000 inhabitants as defined by the Urban Audit) for the reference year 2006.  The GIS data can be downloaded together with a map for each urban area covered and a report with the metadata. The transformation method followed for this dataset was similar to that of CORINE Land Cover dataset.
    • The Greek Administrative Geography dataset. This dataset describes the administrative divisions of Greece (prefecture, municipality, district, etc.). It has been populated with relevant data that are available in Greek open government data portal. For each administrative unit in the dataset (e.g., a municipality) various pieces of information are available (e.g., population and geographical boundaries).
    • The Coastline of Greece dataset. This dataset describes the geometry of the coastline of Greece. For each area contained in the shapefile a unique URI is created and a spatial literal is attributed to it. The spatial literal corresponds to the closed polygon which defines the underlined area.

    The use of these datasets in the NOA fire monitoring service is described in Deliverable D7.2 and the datasets are publicly available at Greek Linked Open Data portal.