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Assistance when there's no assistance: long-term orbit technology for cell phones, PDAs / D. Lundgren in GPS world, vol 16 n° 10 (October 2005)
[article]
Titre : Assistance when there's no assistance: long-term orbit technology for cell phones, PDAs Type de document : Article/Communication Auteurs : D. Lundgren, Auteur ; Franck Van Diggelen, Auteur Année de publication : 2005 Article en page(s) : pp 32 - 36 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement
[Termes IGN] Galileo
[Termes IGN] internet
[Termes IGN] PDA
[Termes IGN] positionnement par GPS
[Termes IGN] réseau télématique
[Termes IGN] télécommunication sans fil
[Termes IGN] téléphonie mobileRésumé : (Editeur) Long-Term Orbit or "extended ephemeris" technology delivers assistance data to assisted GPS (AGPS) devices without requiring wireless connectivity to an AGPS server. Valid for a span of days, LTO data can be obtained through Internet docking, reducing connectivity requirements. A conventional AGPS device must connect to a server almost to hourly to get refreshed assistance data. Numéro de notice : A2005-424 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27560
in GPS world > vol 16 n° 10 (October 2005) . - pp 32 - 36[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 067-05101 SL Revue Centre de documentation Revues en salle Disponible Map design evaluation for mobile display / J. Dillemuth in Cartography and Geographic Information Science, vol 32 n° 4 (October 2005)
[article]
Titre : Map design evaluation for mobile display Type de document : Article/Communication Auteurs : J. Dillemuth, Auteur Année de publication : 2005 Article en page(s) : pp 285 - 301 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Cartographie numérique
[Termes IGN] appareil portable
[Termes IGN] carte topographique
[Termes IGN] conception cartographique
[Termes IGN] ordinateur de poche
[Termes IGN] ordinateur portable
[Termes IGN] petit écran
[Termes IGN] photographie aérienne
[Termes IGN] représentation cartographique
[Termes IGN] téléphonie mobile
[Termes IGN] utilisateurRésumé : (Auteur) How to effectively represent spatial information on handheld mobile devices is a key question, given the increasing use of personal digital assistants (PDAs) and cell phones concurrent with the development of location-based services. The mobile use of digital maps on small displays presents new capabilities and challenges that differ from using paper maps in a mobile setting or viewing digital maps on a desktop computer. This research addresses these issues through a study that evaluated maps on a mobile device used for a field-based navigation task. Map representations at two levels of generalization were compared by analyzing subject performance in a pedestrian route-following task, in which a handheld computer was used as a navigation aid. Subject time and accuracy as well as interaction with the mobile device during the task were measured. The results carry implications for map design for small, mobile displays and identify factors that affect the use of maps while moving. Maps are and will increasingly be used on small displays in mobile contexts for a variety of purposes and in many different environments. The requirements and preferences of mobile users, as well as how these maps are used in different contexts, must be understood in order to inform more effective designs. Numéro de notice : A2005-533 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1559/152304005775194773 En ligne : https://doi.org/10.1559/152304005775194773 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27669
in Cartography and Geographic Information Science > vol 32 n° 4 (October 2005) . - pp 285 - 301[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 032-05041 RAB Revue Centre de documentation En réserve L003 Disponible
[article]
Titre : Clever imaging with Smartscan Type de document : Article/Communication Auteurs : V. Tchernykh, Auteur ; S. Dyblenko, Auteur ; et al., Auteur Année de publication : 2005 Article en page(s) : pp 41 - 45 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] capteur en peigne
[Termes IGN] capteur imageur
[Termes IGN] distorsion d'image
[Termes IGN] image hyperspectrale
[Termes IGN] numériseur à balayage
[Termes IGN] orientation du capteur
[Termes IGN] satellite d'observation de la Terre
[Termes IGN] temps réelRésumé : (Auteur) The cameras commonly used for Earth observation from satellites require high attitude stability during the image acquisition. For some types of cameras (high-resolution 'pushbroom' scanners in particular), instantaneous attitude changes of even less than one arcsecond result in significant image distortion and blurring. Especially problematic are the effects of high-frequency attitude variations originating from micro-shocks and vibrations produced by the momentum and reaction wheels, mechanically activated coolers, and steering and deployment mechanisms on board. The resulting high attitude-stability requirements for Earth-observation satellites are one of the main reasons for their complexity and high cost. The novel SmartScan imaging concept, based on an opto-electronic system with no moving parts, offers the promise of high-quality imaging with only moderate satellite attitude stability. SmartScan uses real-time recording of the actual image motion in the focal plane of the camera during frame acquisition to correct the distortions in the image. Exceptional real-time performances with subpixel-accuracy image-motion measurement are provided by an innovative high-speed onboard opto-electronic correlation processor. SmartScan will therefore allow pushbroom scanners to be used for hyperspectral imaging from satellites and other space platforms not primarily intended for imaging missions, such as micro- and nano-satellites with simplified attitude control, low-orbiting communications satellites, and manned space stations. Numéro de notice : A2005-404 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans En ligne : http://www.esa.int/esapub/bulletin/bulletin123/bul123f_tchernykh.pdf Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27540
in ESA bulletin > n° 123 (August 2005) . - pp 41 - 45[article]Scalable vector graphics: internet display and dissemination of maps / S. Ghosh in GIM international, vol 19 n° 8 (August 2005)
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Titre : Scalable vector graphics: internet display and dissemination of maps Type de document : Article/Communication Auteurs : S. Ghosh, Auteur Année de publication : 2005 Article en page(s) : pp 60 - 63 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web
[Termes IGN] diffusion de données
[Termes IGN] format SVG
[Termes IGN] logiciel libre
[Termes IGN] matériel informatique
[Termes IGN] toile d'araignée mondiale
[Termes IGN] Visual BasicRésumé : (Editeur) The internet has created tremendous potential for the dissemination of geo-information for decision making. Scalable Vector Graphics (SVG) is an OpenSource technology that can be efficiently used by the GIS community to display maps for dissemination via the Web. The author describes how SVG can be used to serve low-budget clients. Numéro de notice : A2005-322 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27458
in GIM international > vol 19 n° 8 (August 2005) . - pp 60 - 63[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 061-05081 RAB Revue Centre de documentation En réserve L003 Disponible Field area checks using GPS, preventing oversubsidisation of EU farmers / S. Kay in GIM international, vol 19 n° 7 (July 2005)
[article]
Titre : Field area checks using GPS, preventing oversubsidisation of EU farmers Type de document : Article/Communication Auteurs : S. Kay, Auteur Année de publication : 2005 Article en page(s) : pp 33 - 35 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] agriculture de précision
[Termes IGN] contrôle
[Termes IGN] PDA
[Termes IGN] politique agricole commune
[Termes IGN] positionnement par GPS
[Termes IGN] système d'information géographique
[Termes IGN] Union EuropéenneRésumé : (Auteur) The area of agricultural fields within the European Union (EU) are checked against clains to ensure that farmers receive the right amount of subsidies. This measure, stemming from EU Common Agricultural Policy reform in the early 1990s and aimed at preventing fraudulent use of taxpayer's money, is now supported by GPS, in addition to the long existing use of remote sensing data. In this first of two features, the author sketches the history of GPS in this context. Numéro de notice : A2005-339 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27475
in GIM international > vol 19 n° 7 (July 2005) . - pp 33 - 35[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 061-05071 RAB Revue Centre de documentation En réserve L003 Disponible Enabling collaborative geoinformation access and decision-making through a natural, multimodal interface / Alan M. MacEachren in International journal of geographical information science IJGIS, vol 19 n° 3 (march 2005)PermalinkL'information géographique plutôt handicapée / Françoise de Blomac in SIG la lettre, n° 65 (mars 2005)PermalinkSatellite navigation, wireless networks and the internet: greater together than the sum of the parts? / F. Toran in ESA bulletin, n° 121 (February 2005)PermalinkLes satellites traquent les voleurs de sapins ! / Françoise de Blomac in SIG la lettre, n° 63 (janvier 2005)PermalinkThe BCS [British Computer Society] glossary of ICT [information and Communications Technology] and computing terms / A. Burdett (2005)PermalinkIncreasing imaging productivity with improved hardware: graphics requirements and spatial data / S. Recine in Geoinformatics, vol 7 n° 8 (01/12/2004)PermalinkLes SIG partent en randonnée [Royan gère ses sentiers de randonnée grâce à un SIG nomade] / Françoise de Blomac in SIG la lettre, n° 61 (novembre 2004)PermalinkLes nomades peinent à se mettre en marche / Françoise de Blomac in SIG la lettre, n° 60 (octobre 2004)PermalinkFlexibility by design: how mobile GIS meets the needs of archaeological survey / N. Tripcevich in Cartography and Geographic Information Science, vol 31 n° 3 (July 2004)PermalinkIntegrated mobile GIS and wireless internet map servers for environnemental monitoring and management / M.H. Tsou in Cartography and Geographic Information Science, vol 31 n° 3 (July 2004)Permalink