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Demarcating new boundaries: mapping virtual polycentric communities through social media content / Anthony Stefanidis in Cartography and Geographic Information Science, vol 40 n° 2 (March 2013)  

Public [article]  inCartography and Geographic Information Science > vol 40 n° 2 (March 2013) . - pp 116 - 129 Titre : Demarcating new boundaries: mapping virtual polycentric communities through social media content Type de document : Article/Communication Auteurs : Anthony Stefanidis, Auteur ; Amy Cotnoir, Auteur ; Arie Croitoru, Auteur ; Andrew Crooks, Auteur ; Matthew Rice, Auteur ; Jacek Radzikowski, Auteur Année de publication : 2013 Article en page(s) : pp 116 - 129 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale [Termes IGN] analyse de données [Termes IGN] communauté virtuelle [Termes IGN] détection de cible [Termes IGN] données issues des réseaux sociaux [Termes IGN] données localisées des bénévoles [Termes IGN] identification automatique [Termes IGN] Syrie [Termes IGN] visualisation cartographique Résumé : (Auteur) The proliferation of social media has led to the emergence of a new type of geospatial information that defies the conventions of authoritative or volunteered geographic information, yet can be harvested to reveal unique and dynamic information about people and their activities. In this paper we address the identification and mapping of global virtual communities formed around issues of specific national interest. We refer to these connected virtual communities formed around issues related to a specific state as the polycentric virtual equivalent of that state. Identifying, mapping, and analyzing these virtual communities is a novel challenge for our community, and this is the subject we pursue in this paper. We present these communities relative to established conventions of statehood, address the harvesting of relevant geographical information from social media feeds, and discuss the challenge of visualizing such information. In order to do so we use the current geopolitical situation in Syria as a demonstrative example. Numéro de notice : A2013-746 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/SOCIETE NUMERIQUE Nature : Article DOI : 10.1080/15230406.2013.776211 En ligne : https://doi.org/10.1080/15230406.2013.776211 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32882 [article]

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#Earthquake: Twitter as a distributed sensor system / Andrew Crooks in Transactions in GIS, vol 17 n° 1 (February 2013)  

Public [article]  inTransactions in GIS > vol 17 n° 1 (February 2013) . - pp 124 - 147 Titre : #Earthquake: Twitter as a distributed sensor system Type de document : Article/Communication Auteurs : Andrew Crooks, Auteur ; Arie Croitoru, Auteur ; et al., Auteur Année de publication : 2013 Article en page(s) : pp 124 - 147 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web [Termes IGN] acquisition de données [Termes IGN] capteur non-imageur [Termes IGN] contenu généré par les utilisateurs [Termes IGN] diffusion de l'information [Termes IGN] épicentre [Termes IGN] Etats-Unis [Termes IGN] production participative [Termes IGN] séisme [Termes IGN] surveillance géologique [Termes IGN] Twitter Résumé : (Auteur) Social media feeds are rapidly emerging as a novel avenue for the contribution and dissemination of information that is often geographic. Their content often includes references to events occurring at, or affecting specific locations. Within this article, we analyze the spatial and temporal characteristics of the twitter feed activity responding to a 5.8 magnitude earthquake which occurred on the East Coast of the United States (US) on August 23, 2011. We argue that these feeds represent a hybrid form of a sensor system that allows for the identification and localization of the impact area of the event. By contrasting this with comparable content collected through the dedicated crowdsourcing ‘Did You Feel It?’ (DYFI) website of the U.S. Geological Survey we assess the potential of the use of harvested social media content for event monitoring. The experiments support the notion that people act as sensors to give us comparable results in a timely manner, and can complement other sources of data to enhance our situational awareness and improve our understanding and response to such events. Numéro de notice : A2013-044 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/SOCIETE NUMERIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/j.1467-9671.2012.01359.x Date de publication en ligne : 09/10/2012 En ligne : https://doi.org/10.1111/j.1467-9671.2012.01359.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32182 [article]

vol 33 n°2 - March 2009 - Distributed and mobile spatial computing (Bulletin de Computers, Environment and Urban Systems) / P. Laube  

Public [n° ou bulletin]  Titre : vol 33 n°2 - March 2009 - Distributed and mobile spatial computing Type de document : Périodique Auteurs : P. Laube, Auteur ; Matt Duckham, Auteur ; Arie Croitoru, Auteur Année de publication : 2009 Langues : Anglais (eng) Numéro de notice : 239-0902 Affiliation des auteurs : non IGN Nature : Numéro de périodique En ligne : http://www.sciencedirect.com/science/journal/01989715/33/2 Format de la ressource électronique : URL Sommaire Permalink : https://documentation.ensg.eu/index.php?lvl=bulletin_display&id=26463 [n° ou bulletin]

vol 62 n° 5 - October 2007 - Distributed geoinformatics : from sensors to systems (Bulletin de ISPRS Journal of photogrammetry and remote sensing) / Matt Duckham  

Public [n° ou bulletin]  est un bulletin de ISPRS Journal of photogrammetry and remote sensing / International society for photogrammetry and remote sensing (1980 -) (1990 -)   Titre : vol 62 n° 5 - October 2007 - Distributed geoinformatics : from sensors to systems Type de document : Périodique Auteurs : Matt Duckham, Éditeur scientifique ; Arie Croitoru, Éditeur scientifique ; International society for photogrammetry and remote sensing (1980 -), Auteur ; Peggy Agouris, Éditeur scientifique Année de publication : 2007 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie Numéro de notice : 081-0707 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Numéro de périodique En ligne : https://doi.org/10.1016/j.isprsjprs.2007.03.005 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=bulletin_display&id=9969 [n° ou bulletin]

Contient

• Integration of heterogeneous geospatial data in a federated database / Matthias Butenuth in ISPRS Journal of photogrammetry and remote sensing, vol 62 n° 5 (October 2007)  
• Intelligent map agents: an ubiquitous personalized GIS / E. Gervais in ISPRS Journal of photogrammetry and remote sensing, vol 62 n° 5 (October 2007)  
• Time geography for ad-hoc shared-ride trip planning in mobile geosensor networks / Martin Raubal in ISPRS Journal of photogrammetry and remote sensing, vol 62 n° 5 (October 2007)  

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The design and prototype of a distributed geo-spatial infrastructure for smart sensors webs / Steve H.L. Liang (2003)  

Public contenu dans AGILE 2003, 6th Agile Conference on Geographic Information Science, Lyon, 24 - 26 April, 2003 / Michael Gould (2003)   Titre : The design and prototype of a distributed geo-spatial infrastructure for smart sensors webs Type de document : Article/Communication Auteurs : Steve H.L. Liang, Auteur ; C. Vincent Tao, Auteur ; Arie Croitoru, Auteur Editeur : Lausanne [Suisse] : Presses polytechiques et universitaires romandes Année de publication : 2003 Conférence : AGILE 2003, 6th international conference on geographic information science 24/04/2003 26/04/2003 Lyon France Open access proceedings Importance : pp 303 - 311 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web [Termes IGN] architecture orientée services [Termes IGN] base de données répartie [Termes IGN] géomatique web [Termes IGN] infrastructure mondiale des données localisées [Termes IGN] réseau de capteurs [Termes IGN] service web géographique [Termes IGN] télécommunication sans fil [Termes IGN] téléphone intelligent Résumé : (Auteur) So far, over 100 physical (light, pressure, humidity etc), chemical (gas, liquid, solid, etc) aid biological (DNA, protein, acoustics etc) properties can be sensed by using in situ sensing technology. With the presence of cheaper, miniature, faster, and smart in situ sensors, and the increasing availability of abundant ubiquitous computing devices, wireless and mobile network access, and autonomous and intelligent geospatial software agents, distributed networked in situ sensing becomes clearly a technological trend. Sensor webs can perform as an extensive monitoring and sensing system that provides timely, comprehensive, continuous and multimode observations. This new earth observation system opens up a new avenue to fast assimilation of data from various sensors (both in situ and remote) and to accurate analysis and informed decision makings. One of the critical components in developing a sensor web is to build a geospatial information infrastructure, a backbone that connects the heterogeneous in-situ sensors and remote sensors over the wired or wireless networks. This paper describes a distributed GIServices architecture, which serves as a gateway that integrates and fuses observations from spatially referenced sensors. A GIServices prototype -GeoServNet which is being developed in GeoICT Lab, York University is also introduced in this paper. What is smart sensor webs "A system composed of multiple science instrument/processor platforms that are interconnected by means of a communications fabric for the purpose of collecting measurements and processing data for Earth or Space Science objectives." This is the definition of Sensor Web from NASA Sensor Web Applied Research Planning Group. Sensor Web can be seen as an advanced smart sensor network. Business week provide a vivid and easy understanding description of smart sensor web : “In the next century, planet Earth will don an electronic skin. It will use the Internet as a scaffold to support and transmit sensations. This skin is already being stitched together. It consists of millions of embedded electronic measuring devices: thermostats, pressure gauges, pollution detectors, cameras, microphones, glucose sensors, EKGs, electroencephalographs. These will probe and monitor cities and endangered species, the atmosphere, our ships, highways and fleets of trucks, our conversations, our bodies - even our dreams." Numéro de notice : C2003-010 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Communication DOI : sans En ligne : https://agile-online.org/conference_paper/cds/agile_2003/proceedings/38.pdf Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=64989

Photo orientation under unstable conditions: a robust trial and error approach using range ratios / Arie Croitoru in Photogrammetric record, vol 17 n° 97 (April - September 2001)  

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