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Eight times acceleration of geospatial data archiving and distribution on the grids / F. Wang in IEEE Transactions on geoscience and remote sensing, vol 47 n° 5 (May 2009)  

Public [article]  inIEEE Transactions on geoscience and remote sensing > vol 47 n° 5 (May 2009) . - pp 1444 - 1453 Titre : Eight times acceleration of geospatial data archiving and distribution on the grids Type de document : Article/Communication Auteurs : F. Wang, Auteur ; N. Helian, Auteur ; S. Wu, Auteur ; et al., Auteur Année de publication : 2009 Article en page(s) : pp 1444 - 1453 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Infrastructure de données [Termes IGN] archivage électronique [Termes IGN] diffusion de données [Termes IGN] données localisées 3D [Termes IGN] protocole [Termes IGN] Web Processing Service Résumé : (Auteur) A grid-powered Web Geographical Information Science (GIS)/Web Processing Service (WPS) system has been developed for archiving and distributing large volumes of geospatial data. However, users, WPS servers, and data resources are always distributed across different locations, attempting to access and archive geospatial data from a GIS survey via conventional Hypertext Transport Protocol, Network File System Protocol, and File Transfer Protocol, which often encounters long waits and frustration in wide area network (WAN) environments. To provide a ldquolocal-likerdquo performance, a WAN/grid-optimized protocol known as ldquoGridJetrdquo developed at our lab was used as the underlying engine between WPS servers and clients, which utilizes a wide range of technologies including the one of paralleling the remote file access. No change in the way of using software is required since the multistreamed GridJet protocol remains fully compatible with the existing IP infrastructures. Our recent progress includes a real-world test that PyWPS and Google Earth over the GridJet protocol beat those over the classic ones by a factor of two to eight, where the distribution/archiving distance is over 10 000 km. Copyright IEEE Numéro de notice : A2009-150 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2008.2010055 En ligne : https://doi.org/10.1109/TGRS.2008.2010055 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29780 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
065-09051	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Geo-information and location based services: principles and some experiences with applications for mountaineers / Wolfgang Reinhardt in GIS Geo-Informations-Systeme, vol 2003 n° 6 (Juni 2003)

Public [article]  inGIS Geo-Informations-Systeme > vol 2003 n° 6 (Juni 2003) . - pp 24 - 29 Titre : Geo-information and location based services: principles and some experiences with applications for mountaineers Type de document : Article/Communication Auteurs : Wolfgang Reinhardt, Auteur ; F. Sayda, Auteur ; A. Kandawasvika, Auteur ; F. Wang, Auteur ; E. Wittmann, Auteur Année de publication : 2003 Article en page(s) : pp 24 - 29 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale [Termes IGN] Alpes [Termes IGN] géonavigateur [Termes IGN] montagne [Termes IGN] positionnement par GPS [Termes IGN] Pyrénées (montagne) [Termes IGN] service fondé sur la position [Termes IGN] télécommunication sans fil Résumé : (Auteur) The paper gives an overview on the development of a Mountaineering Information System helping hikers, wanderers and bikers to get helpful information on their leisure environment. Two main collaborating EU projects are carried out for this purpose : VISPA and PARAMOUNT. With the use of client/server technologies, wireless communication and GPS coordinates special purpose Location Based Services are provided. The developed software modules are proven under real testbed applications in the European Alps. Numéro de notice : A2003-140 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22436 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
058-03061	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Modeling commute patterns in Chicago in a GIS environment: a job-accessibility perspective / F. Wang in The professional geographer, vol 52 n° 1 (February 2000)

Public [article]  inThe professional geographer > vol 52 n° 1 (February 2000) . - pp 120 - 133 Titre : Modeling commute patterns in Chicago in a GIS environment: a job-accessibility perspective Type de document : Article/Communication Auteurs : F. Wang, Auteur Année de publication : 2000 Article en page(s) : pp 120 - 133 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes d'information géographique [Termes IGN] accessibilité [Termes IGN] Chicago (Illinois) [Termes IGN] système d'information géographique [Termes IGN] transport [Termes IGN] travail Résumé : (Auteur) Using the newly released Census for Transportation Planning Package (CTPP) 1990, this research utilizes GIS tools to explain intraurban variations of commuting in Chicago at the Traffic Analysis Zone (TAZ) level. While commute times are directly available from the CTPP, commute distances are derived from the shortest time distances through real-world road networks. GIS surface modeling is used to help identify the major employment center (CBD) and other subcenters. The explanations of commute times and distances are attempted by various measures of job accessibility : the jobs-housing balance ratio defined in a floating catchment area, distances from the CBD and subcenters, and a gravity-based index that takes the effects of all jobs into account. These measurements better explain how far people commute than how much time they spend on commuting. The best model explains over 50% of the variation of commuting among 7,835 TAZs. This is a significant improvement over existing literature, which at best explained less than 30 percent. Copyright Association of American Geographers Numéro de notice : A2000-169 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=21585 [article]

Improving remote sensing image analysis through fuzzy information representation / F. Wang in Photogrammetric Engineering & Remote Sensing, PERS, vol 56 n° 8 (august 1990)  

Public [article]  inPhotogrammetric Engineering & Remote Sensing, PERS > vol 56 n° 8 (august 1990) . - pp 1163 - 1168 Titre : Improving remote sensing image analysis through fuzzy information representation Type de document : Article/Communication Auteurs : F. Wang, Auteur Année de publication : 1990 Article en page(s) : pp 1163 - 1168 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] analyse d'image numérique [Termes IGN] classification dirigée [Termes IGN] sous ensemble flou [Termes IGN] système d'information géographique Numéro de notice : A1990-139 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans En ligne : https://www.asprs.org/wp-content/uploads/pers/1990journal/aug/1990_aug_1163-1169 [...] Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=25555 [article]