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A bright idea: testing the feasibility of positionning using ambient light / J. Liu in GPS world, vol 25 n° 11 (novembre 2014)  

Public [article]  inGPS world > vol 25 n° 11 (novembre 2014) . - pp 45 - 50 Titre : A bright idea: testing the feasibility of positionning using ambient light Type de document : Article/Communication Auteurs : J. Liu, Auteur ; R. Chen, Auteur ; Y. Chen, Auteur ; et al., Auteur Année de publication : 2014 Article en page(s) : pp 45 - 50 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement [Termes IGN] éclairage [Termes IGN] positionnement en intérieur Index. décimale : 30.70 Navigation et positionnement Résumé : (Editeur) In this month colmumn, we take a look at simple, innovative method of light fingerprinting: the use of observations of the artificial light emitted by unmodified light fixtures as well as the natural light passes through windows and doorways in a technique for position determination inside buildings. Numéro de notice : A2014-613 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans En ligne : http://gpsworld.com/innovation-a-bright-idea/ Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=74879 [article]

Exemplaires(1)

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067-2014111	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Generalization of DEM for terrain analysis using a compound method / Q. Zhou in ISPRS Journal of photogrammetry and remote sensing, vol 66 n° 1 (January - February 2011)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 66 n° 1 (January - February 2011) . - pp 38 - 45 Titre : Generalization of DEM for terrain analysis using a compound method Type de document : Article/Communication Auteurs : Q. Zhou, Auteur ; Y. Chen, Auteur Année de publication : 2011 Article en page(s) : pp 38 - 45 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique [Termes IGN] erreur moyenne quadratique [Termes IGN] généralisation automatique de données [Termes IGN] généralisation de MNT [Termes IGN] modèle numérique de surface [Termes IGN] Triangulated Irregular Network Résumé : (Auteur) This paper reports an investigation into the generalization of a grid-based digital elevation model (DEM) for the purpose of terrain analysis. The focus is on the method of restructuring the grid-based surface elevation data to form a triangulated irregular network (TIN) that is optimized to keep the important terrain features and slope morphology with the minimum number of sample points. The critical points of the terrain surface are extracted from the DEM based on their significance, measured not only by their local relief, but also by their importance in identifying inherent geomorphological and drainage features in the DEM. A compound method is proposed by integrating the traditional point-additive and feature-point methods to construct a drainage-constrained TIN. The outcome is then compared with those derived from other selected methods including filtering, point-additive or feature-point algorithms. The results show that the compound approach is capable of taking advantage of both point-additive and feature-point algorithms to maximally keep the terrain features and to maintain RMSE at an acceptable level, while reducing the elevation data points by over 99%. The analytical result also shows that the proposed method outperforms the compared methods with better control in retaining drainage features at the same level of RMSE. Numéro de notice : A2011-015 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2010.08.005 En ligne : https://doi.org/10.1016/j.isprsjprs.2010.08.005 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30797 [article]

Exemplaires(1)

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081-2011011	SL	Revue	Centre de documentation	Revues en salle	Disponible

An agent-based model for optimal land allocation (AgentLA) with a contiguity constraint / Y. Chen in International journal of geographical information science IJGIS, vol 24 n°7-8 (july 2010)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 24 n°7-8 (july 2010) . - pp 1269 - 1288 Titre : An agent-based model for optimal land allocation (AgentLA) with a contiguity constraint Type de document : Article/Communication Auteurs : Y. Chen, Auteur ; X. Li, Auteur ; X. Liu, Auteur ; et al., Auteur Année de publication : 2010 Article en page(s) : pp 1269 - 1288 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale [Termes IGN] agent (intelligence artificielle) [Termes IGN] allocation [Termes IGN] Canton (Kouangtoung) [Termes IGN] optimisation (mathématiques) [Termes IGN] participation du public [Termes IGN] programmation par contraintes Résumé : (Auteur) Spatial optimization is complex because it usually involves numerous spatial factors and constraints. The optimization becomes more challenging if a large set of spatial data with fine resolutions are used. This article presents an agent-based model for optimal land allocation (AgentLA) by maximizing the total amount of land-use suitability and the compactness of patterns. The essence of the optimization is based on the collective efforts of agents for formulating the optimal patterns. A local and global search strategy is proposed to inform the agents to select the sites properly. Three sets of hypothetical data were first used to verify the optimization effects. AgentLA was then applied to the solution of the actual land allocation optimization problems in Panyu city in the Pearl River Delta. The study has demonstrated that the proposed method has better performance than the simulated annealing method for solving complex spatial optimization problems. Experiments also indicate that the proposed model can produce patterns that are very close to the global optimums. Numéro de notice : A2010-329 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810903401024 En ligne : https://doi.org/10.1080/13658810903401024 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30523 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
079-2010041	RAB	Revue	Centre de documentation	En réserve L003	Disponible
079-2010042	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Multi-sensor, multi-network positioning / R. Chen in GPS world, vol 21 n° 2 (February 2010)

Public [article]  inGPS world > vol 21 n° 2 (February 2010) . - 3 p. ; pp 18 - 20 Titre : Multi-sensor, multi-network positioning Type de document : Article/Communication Auteurs : R. Chen, Auteur ; H. Kuusniemi, Auteur ; Y. Chen, Auteur ; et al., Auteur Année de publication : 2010 Article en page(s) : 3 p. ; pp 18 - 20 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement [Termes IGN] filtre de Kalman [Termes IGN] GPS-INS [Termes IGN] modèle de Markov [Termes IGN] navigation à l'estime [Termes IGN] réseau local sans fil [Termes IGN] télécommunication sans fil Résumé : (Documentaliste) Après avoir décrit le matériel nécessaire à un positionnement multi-capteurs et multi-réseaux, cet article s'intéresse aux algorithmes qui permettent un positionnement grâce à une combinaison de GPS-INS ou de GPS et de navigation à l'estime pour piétons. On recourt aux réseaux de télécommunications sans fil pour le positionnement en intérieur. Numéro de notice : A2010-026 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30222 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
067-2010021	RAB	Revue	Centre de documentation	En réserve L003	Disponible

From here to eternity: an experiment applying the e-framework infrastructure for education and research and the SUMO ontology to standards-based geospatial Web services / K. Stock in International Journal of Spatial Data Infrastructures Research, vol 5 (Year 2010) 

Public [article]  inInternational Journal of Spatial Data Infrastructures Research > vol 5 (Year 2010) . - 57 p. ; pp 1 - 57 Titre : From here to eternity: an experiment applying the e-framework infrastructure for education and research and the SUMO ontology to standards-based geospatial Web services Type de document : Article/Communication Auteurs : K. Stock, Auteur ; B. Butchart, Auteur ; C. Higgins, Auteur ; Y. Chen, Auteur Année de publication : 2010 Article en page(s) : 57 p. ; pp 1 - 57 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique [Termes IGN] architecture orientée services [Termes IGN] géomatique web [Termes IGN] ontologie [Termes IGN] service web géographique [Termes IGN] standard OGC Résumé : (Auteur) A number of efforts have been made in recent years to define standards for the description of resources (including web services) in services oriented architectures. These standards often use description logic ontologies (for example, OWL-S) and are intended to be machine-readable. They have been applied to geospatial web services to describe the functions that those services perform in a way that can be automatically interpreted by systems. By contrast, little effort has gone into the development of human readable descriptions of resources in a services oriented architecture, other than using unstructured natural language. e-Framework is an infrastructure for the higher education environment that provides a typology of human-readable artefacts that can be used to describe resources, and provides an internal structure for those artefacts. e-Framework has thus far not been used with geospatial information even though geospatial information has a number of important roles in education and research, and has a well-organised community of users and creators. This paper applies the e-Framework infrastructure to OGC web services, and also recommends the refinement of e-Framework with the use of the SUMO Upper Level Ontology to define Service Genres, the most abstract level of artefacts in e-Framework. It then illustrates the ways in which the Open Geospatial Consortium standards and specifications may be described in e- Framework. The work evaluates SUMO for e-Framework purposes, finding that its use for Service Genres is possible and offers a number of gains. It also evaluates e-Framework from a geospatial perspective, and shows that e-Framework's constraints on resource descriptions do not suit the large and complex nature of geospatial web services. Numéro de notice : A2010-668 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=33425 [article]

Documents numériques

peut être téléchargé From here to eternity ... - pdf éditeur Adobe Acrobat PDF

A quaternion-based geodetic datum transformation algorithm / Y.Z. Shen in Journal of geodesy, vol 80 n° 5 (August 2006)  

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A quantitative measure for the quality of InSAR interferograms based on phase differences / Z. Li in Photogrammetric Engineering & Remote Sensing, PERS, vol 70 n° 10 (October 2004)  

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