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A data mining approach for evaluation of optimal time-series of MODIS data for land cover mapping at a regional level / Fuqun Zhou in ISPRS Journal of photogrammetry and remote sensing, vol 84 (October 2013)
[article]
Titre : A data mining approach for evaluation of optimal time-series of MODIS data for land cover mapping at a regional level Type de document : Article/Communication Auteurs : Fuqun Zhou, Auteur ; Aining Zhang, Auteur ; Lawrence Townley-Smith, Auteur Année de publication : 2013 Article en page(s) : pp 114 - 129 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] carte d'occupation du sol
[Termes IGN] exploration de données géographiques
[Termes IGN] image Terra-MODIS
[Termes IGN] indice de végétation
[Termes IGN] occupation du sol
[Termes IGN] série temporelleRésumé : (Auteur) Optical Earth Observation data with moderate spatial resolutions, typically MODIS (Moderate Resolution Imaging Spectroradiometer), are of particular value to environmental applications due to their high temporal and spectral resolutions. Time-series of MODIS data capture dynamic phenomena of vegetation and its environment, and are considered as one of the most effective data sources for land cover mapping at a regional and national level. However, the time-series, multiple bands and their derivations such as NDVI constitute a large volume of data that poses a significant challenge for automated mapping of land cover while optimally utilizing the information it contains. In this study, time-series of 10-day cloud-free MODIS composites and its derivatives – NDVI and vegetation phenology information, are fully assessed to determine the optimal data sets for deriving land cover. Three groups of variable combinations of MODIS spectral information and its derived metrics are thoroughly explored to identify the optimal combinations for land cover identification using a data mining tool. The results, based on the assessment using time-series of MODIS data, show that in general using a longer time period of the time-series data and more spectral bands could lead to more accurate land cover identification than that of a shorter period of the time-series and fewer bands. However, we reveal that, with some optimal variable combinations of few bands and a shorter period of time-series data, the highest possible accuracy of land cover classification can be achieved. Numéro de notice : A2013-520 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2013.07.008 En ligne : https://doi.org/10.1016/j.isprsjprs.2013.07.008 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32657
in ISPRS Journal of photogrammetry and remote sensing > vol 84 (October 2013) . - pp 114 - 129[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 081-2013101 RAB Revue Centre de documentation En réserve L003 Disponible Getting closer to everywhere: accurately tracking smartphones indoors / Ramsey Faragher in GPS world, vol 24 n° 10 (October 2013)
[article]
Titre : Getting closer to everywhere: accurately tracking smartphones indoors Type de document : Article/Communication Auteurs : Ramsey Faragher, Auteur ; Robert Harle, Auteur Année de publication : 2013 Article en page(s) : pp 43 - 49 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement
[Termes IGN] accéléromètre
[Termes IGN] apprentissage automatique
[Termes IGN] gyroscope
[Termes IGN] magnétomètre
[Termes IGN] microsystème électromécanique
[Termes IGN] navigation à l'estime
[Termes IGN] navigation pédestre
[Termes IGN] odomètre
[Termes IGN] positionnement en intérieur
[Termes IGN] téléphone intelligentRésumé : (Editeur) [...] What are we to do if we wish to obtain consistently usable positions indoors using a mobile phone? As we will see in this month's column, we can augment or bypass its GPS or GNSS receiver with other unfettered sensing technologies such as gyroscopes and accelerometers. These devices can be made very small using microelectromechanical technology and are already included in some mobile phones. However, there are some issues with these devices for positioning, not the least of which is rapid position drift. We can restrain the drift by using magnetometers, for example - also present in some mobile phones. We can also use radio signals of opportunity to help in the positioning - signals available in the phone such as multi-generation mobile signals, Bluetooth, and Wi-Fi through their signal strength "fingerprints." But is all of this actually feasible? The authors of the article in this month's column have conducted tests of such a multi-system approach to positioning indoors with quite favorable results. Are we at the stage of accurate positioning (and tracking) everywhere? Not quite, but we are getting closer. Numéro de notice : A2013-586 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32722
in GPS world > vol 24 n° 10 (October 2013) . - pp 43 - 49[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 067-2013101 RAB Revue Centre de documentation En réserve L003 Disponible Simulating spatial dynamics and processes in a retail gasoline market: An agent-based modeling approach / Alison J. Heppenstall in Transactions in GIS, vol 17 n° 5 (October 2013)
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Titre : Simulating spatial dynamics and processes in a retail gasoline market: An agent-based modeling approach Type de document : Article/Communication Auteurs : Alison J. Heppenstall, Auteur ; Kirk Harland, Auteur ; Andrew N. Ross, Auteur ; Dan Olner, Auteur Année de publication : 2013 Article en page(s) : pp 661 - 682 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale
[Termes IGN] agent (intelligence artificielle)
[Termes IGN] analyse spatiale
[Termes IGN] consommation
[Termes IGN] coût
[Termes IGN] dynamique spatiale
[Termes IGN] économie de marché
[Termes IGN] modélisation spatiale
[Termes IGN] pétrole
[Termes IGN] processus spatial
[Termes IGN] venteRésumé : (Auteur) Simulating the dynamics and processes within a spatially influenced retail market, such as the retail gasoline market, is a highly challenging research area. Current approaches are limited through their inability to model the impact of supplier or consumer behavior over both time and space. Agent-based models (ABMs) provide an alternative approach that overcomes these problems. We demonstrate how knowledge of retail pricing is extended by using a ‘hybrid’ model approach: an agent model for retailers and a spatial interaction model for consumers. This allows the issue of spatial competition between individual retailers to be examined in a way only accessible to agent-based models, allowing each model retailer autonomous control over optimizing their price. The hybrid model is shown to be successful at recreating spatial pricing dynamics at a national scale, simulating the effects of a rise in crude oil prices as well as accurately predicting which retailers were most susceptible to closure over a 10-year period. Numéro de notice : A2013-576 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/tgis.12027 Date de publication en ligne : 23/04/2013 En ligne : https://doi.org/10.1111/tgis.12027 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32712
in Transactions in GIS > vol 17 n° 5 (October 2013) . - pp 661 - 682[article]A spatial-based KDD process to better manage the river water quality / Hugo Alatrista-Salas in Revue internationale de géomatique, vol 23 n° 3 - 4 (septembre 2013 - février 2014)
[article]
Titre : A spatial-based KDD process to better manage the river water quality Titre original : Un processus d'ECD spatial pour une meilleure gestion de la qualité de l'eau des rivières Type de document : Article/Communication Auteurs : Hugo Alatrista-Salas, Auteur ; Frédéric Flouvat, Auteur ; Sandra Bringay, Auteur Année de publication : 2013 Article en page(s) : pp 469 - 494 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale
[Termes IGN] base de données localisées
[Termes IGN] découverte de connaissances
[Termes IGN] données spatiotemporelles
[Termes IGN] exploration de données géographiques
[Termes IGN] gestion de l'eau
[Termes IGN] qualité des eaux
[Termes IGN] rivièreRésumé : (Auteur) Rapid population growth and human activities (such as agriculture, industry, transports...) development have increased vulnerability risk for water resources. Due to the nature of river networking distribution, the interactions between hydrosystems and human pressures are difficult understand. In addition, many hypotheses about river water pollution can be formulated. In this context, knowledge discovery is a promising process to better understand and manage such phenomenon. We have combined the results of several data mining methods to extract actionable knowledge from data collected by stations located along several rivers. First, data are pre processed (aggregated) according to different spatial relationships, which leads to the extraction of semantically different patterns in the second phase of the process. Then, the resulting datasets are mined to extract sequential and spatio-sequential patterns. Finally, patterns are filtered using a new quality measure based on the notion of contradiction. Such elements can be used to assess specialized indicators to assist the experts in river water quality restoration. Numéro de notice : A2013-721 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.3166/rig.23.469-494 En ligne : https://doi.org/10.3166/rig.23.469-494 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32857
in Revue internationale de géomatique > vol 23 n° 3 - 4 (septembre 2013 - février 2014) . - pp 469 - 494[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 047-2013031 SL Revue Centre de documentation Revues en salle Exclu du prêt The signature of self-organisation in cities: Temporal patterns of clustering and growth in street networks / Kinda Al-Sayed in Revue internationale de géomatique, vol 23 n° 3 - 4 (septembre 2013 - février 2014)
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Titre : The signature of self-organisation in cities: Temporal patterns of clustering and growth in street networks Type de document : Article/Communication Auteurs : Kinda Al-Sayed, Auteur Année de publication : 2013 Article en page(s) : pp 379 - 406 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale
[Termes IGN] analyse diachronique
[Termes IGN] Barcelone
[Termes IGN] carte de Kohonen
[Termes IGN] changement d'utilisation du sol
[Termes IGN] complexité
[Termes IGN] croissance urbaine
[Termes IGN] invariant
[Termes IGN] modélisation spatiale
[Termes IGN] New York (Etats-Unis ; ville)
[Termes IGN] réseau routierRésumé : (Auteur) Current research on urban growth is witnessing a division between understanding urban phenomenon as an end product of underlying processes and assumption-based computational modelling. To bridge the gap, there is a need to seek evidence that solidifies any assumptions made about growth dynamics. For this purpose, we attempt to outline invariants in the historical evolution of two urban structures; Manhattan and Barcelona. By modelling changes on the street elements and the clusters they form, we mark invariants that expose self-organisational patterns similar to those in reaction-diffusion dynamics. While it is difficult to verify the role of these invariants in the organised behaviour of urban complexity, their very presence marks one of the defining characteristics for urban pattern recognition. Numéro de notice : A2013-717 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.3166/rig.23.379-406 En ligne : https://doi.org/10.3166/rig.23.379-406 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32853
in Revue internationale de géomatique > vol 23 n° 3 - 4 (septembre 2013 - février 2014) . - pp 379 - 406[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 047-2013031 SL Revue Centre de documentation Revues en salle Exclu du prêt Approche exploratoire SIG pour l'identification des piézomètres représentatifs d'une relation nappe/rivière / Alexandre Brugeron in Géomatique expert, n° 94 (01/09/2013)PermalinkGeneralized composite kernel framework for hyperspectral image classification / J. Li in IEEE Transactions on geoscience and remote sensing, vol 51 n° 9 (September 2013)PermalinkReal-time generalization of point data in mobile and web mapping using quadtrees / Pia Bereuter in Cartography and Geographic Information Science, vol 40 n° 4 (September 2013)PermalinkTemporal logic and operation relations based knowledge representation for land cover change web services / Jun Chen in ISPRS Journal of photogrammetry and remote sensing, vol 83 (September 2013)PermalinkTowards qualitative geovisual analytics: A case study involving places, people, and mediated experience / Ryan Burns in Cartographica, vol 48 n° 3 (October 2013)PermalinkAssessing the veracity of methods for extracting place semantics from Flickr tags / William A Mackaness in Transactions in GIS, vol 17 n° 4 (August 2013)PermalinkFinding science with science: Evaluating a domain and scientific ontology user interface for the discovery of scientific resources / Kristin Stock in Transactions in GIS, vol 17 n° 4 (August 2013)PermalinkA methodological framework for researching the usability of the space-time cube / Irma Kveladze in Cartographic journal (the), vol 50 n° 3 (August 2013)PermalinkTemporal uncertainty in a small area open geodemographic classification / Christopher G. Gale in Transactions in GIS, vol 17 n° 4 (August 2013)PermalinkVisual discovery of synchronisation in weather data at multiple temporal resolutions / Xiaojing Wu in Cartographic journal (the), vol 50 n° 3 (August 2013)Permalink