Anzeige
Erschienen in:
2014 | OriginalPaper | Buchkapitel
Geographic Summaries from Crowdsourced Data
verfasst von : Giuseppe Rizzo, Giacomo Falcone, Rosa Meo, Ruggero G. Pensa, Raphaël Troncy, Vuk Milicic
Erschienen in: The Semantic Web: ESWC 2014 Satellite Events
Aktivieren Sie unsere intelligente Suche, um passende Fachinhalte oder Patente zu finden.
Wählen Sie Textabschnitte aus um mit Künstlicher Intelligenz passenden Patente zu finden. powered by
Markieren Sie Textabschnitte, um KI-gestützt weitere passende Inhalte zu finden. powered by
Abstract
In this paper, we present a research prototype for creating geographic summaries using the whereabouts of Foursquare users. Exploiting the density of the venue types in a particular region, the system adds a layer over any typical cartography geographic maps service, creating a first glance summary over the venues sampled from the Foursquare knowledge base. Each summary is represented by a convex hull. The shape is automatically computed according to the venue densities enclosed in the area. The summary is then labeled with the most prominent category or categories. The prominence is given by the observed venue category density. The prototype provides two outputs: a light-weight representation structured in GeoJSON, and a semantic description using the Open Annotation Ontology. We evaluate the quality of the summaries using the Sum of Squared Errors (SSE) and the Jaccard distance. The system is available at http://geosummly.eurecom.fr.