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Mobile Visibility Querying for LBS / J. Carswell in Transactions in GIS, vol 14 n° 6 (December 2010)  

Public [article]  inTransactions in GIS > vol 14 n° 6 (December 2010) . - pp 791 - 809 Titre : Mobile Visibility Querying for LBS Type de document : Article/Communication Auteurs : J. Carswell, Auteur ; J. Yin, Auteur ; K. Gardiner, Auteur Année de publication : 2010 Article en page(s) : pp 791 - 809 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement [Termes IGN] ligne de visée [Termes IGN] orientation du capteur [Termes IGN] position [Termes IGN] positionnement par GPS [Termes IGN] service fondé sur la position [Termes IGN] téléphone intelligent [Termes IGN] téléphonie mobile Résumé : (Auteur) This article describes research carried out in the area of mobile spatial interaction (MSI) and the development of a 3D mobile version of a 2D web-based directional query processor. The TellMe application integrates location (from GPS, GSM, WiFi) and orientation (from magnetometer/accelerometer) sensor technologies into an enhanced spatial query processing module capable of exploiting a mobile device's position and orientation for querying real-world spatial datasets. This article outlines our technique for combining these technologies and the architecture needed to deploy them on a sensor enabled smartphone (i.e. Nokia Navigator 6210). With all these sensor technologies now available on off-the-shelf devices, it is possible to employ a mobile query system that can work effectively in any environment using location and orientation as primary parameters for directional queries. Novel approaches for determining a user's visible query space in three dimensions based on their line-of-sight (ego-visibility) are investigated to provide for “hidden query removal” functionality. This article presents demonstrable results of a mobile application that is location, direction, and orientation aware, and that retrieves database objects and attributes (e.g. buildings, points-of-interest, etc.) by simply pointing, or “looking”, at them with a mobile phone. Numéro de notice : A2010-516 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/j.1467-9671.2010.01230.x Date de publication en ligne : 07/12/2010 En ligne : https://doi.org/10.1111/j.1467-9671.2010.01230.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30708 [article]

Three dimensional query / J. Carswell in GIM international, vol 24 n° 8 (August 2010)

Public [article]  inGIM international > vol 24 n° 8 (August 2010) . - pp 24 - 29 Titre : Three dimensional query Type de document : Article/Communication Auteurs : J. Carswell, Auteur ; K. Gardiner, Auteur ; J. Yin, Auteur Année de publication : 2010 Article en page(s) : pp 24 - 29 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique [Termes IGN] Androïd [Termes IGN] modèle 3D de l'espace urbain [Termes IGN] modèle numérique du bâti [Termes IGN] réalité virtuelle [Termes IGN] système de gestion de base de données [Termes IGN] téléphone intelligent [Termes IGN] téléphonie mobile [Termes IGN] visibilité Résumé : (Auteur) GPS receivers, digital compasses (magnetometers) and tilt sensors (accelerometers) are increasingly implemented in state-of-the-art smartphones such as the iPhone and various Android phones. The resulting data on location, azimuth, and declination angles, together with images from inbuilt cameras, enable creation of a photorealistic and geometricaly accurate city model. In turn, the newly created 3D scene can be queried wirelessly while moving through an urban environment. The authors developped a prototype - Three dimensional Query (3DQ) - which tailors 3D visibility analysis to mobile devices based on a military-style threat dome computation. Numéro de notice : A2010-314 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30508 [article]