Papers by Kostis Kyzirakos
Lecture Notes in Computer Science, 2014
ABSTRACT Earth Observation satellites acquire huge volumes of high resolution images continuously... more ABSTRACT Earth Observation satellites acquire huge volumes of high resolution images continuously increasing the size of the archives and the variety of EO products. However, only a small part of this data is exploited. In this paper, we present how we take advantage of the TerraSAR-X images of the German Aerospace Center in order to build applications on top of EO data.
Lecture Notes in Computer Science, 2013
Strabon is a very scalable and efficient RDF store for storing and querying geospatial data that ... more Strabon is a very scalable and efficient RDF store for storing and querying geospatial data that changes over time. We present the geospatial and temporal features of Strabon and we demonstrate their utilization in the fire monitoring and the burn scar mapping applications of the National Observatory of Athens.
Lecture Notes in Computer Science, 2013
Geospatial extensions of SPARQL like GeoSPARQL and stSPARQL have recently been defined and corres... more Geospatial extensions of SPARQL like GeoSPARQL and stSPARQL have recently been defined and corresponding geospatial RDF stores have been implemented. However, there is no widely used benchmark for evaluating geospatial RDF stores which takes into account recent advances to the state of the art in this area. In this paper, we develop a benchmark, called Geographica, which uses both real-world and synthetic data to test the offered functionality and the performance of some prominent geospatial RDF stores.
Deliverable D1. 4v1, …, 2010
AGU Fall Meeting Abstracts, Dec 1, 2010
One of the issues of current interest in sensor networks is how to discover and integrate data fr... more One of the issues of current interest in sensor networks is how to discover and integrate data from a wide range of sources: from data persisted in legacy information systems or coming from sensor networks to data available in the Web (ie, linked data). One way to facilitate disparate data discovery and integration is to describe them semantically. The SemsorGrid4Env project is working on systems where data sources can be located with semantic web technologies while defacto standards can be used to actually access the ...
• The vision of the Geospatial Semantic Web: Provide a formal semantic specification to enable th... more • The vision of the Geospatial Semantic Web: Provide a formal semantic specification to enable the discovery, query and consumption of geospatial content.
Resource metadata is modeled using stRDF, an extension of RDF, that can be used to represent th... more Resource metadata is modeled using stRDF, an extension of RDF, that can be used to represent thematic, spatial and temporal metadata.
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Papers by Kostis Kyzirakos