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Visual comparison of moving-window kriging models / Urška Demšar in Cartographica, vol 46 n° 4 (December 2011)  

Public [article]  inCartographica > vol 46 n° 4 (December 2011) . - pp 211 - 226 Titre : Visual comparison of moving-window kriging models Type de document : Article/Communication Auteurs : Urška Demšar, Auteur ; P. Harris, Auteur Année de publication : 2011 Article en page(s) : pp 211 - 226 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale [Termes IGN] analyse comparative [Termes IGN] krigeage [Termes IGN] visualisation cartographique Résumé : (Auteur) Kriging is a spatial prediction method that is core to the geo-statistical paradigm. Commonly applied in the environmental sciences, it enables a prediction at an unsampled location coupled with a measure of confidence in its accuracy. Many variations of kriging exist, some of them complex, especially those that allow many parameters to vary spatially. Calibrating such a kriging model and interpreting its results can therefore be quite daunting. We suggest that visualization and visual exploration can help with this task. In particular, we focus on the moving-window kriging model, evaluating three newly developed robust variants of this model against a basic counterpart. We use star icon maps and plots to visually explore model results to evaluate model parameterization, specification, and performance. Numéro de notice : A2011-483 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.3138/carto.46.4.211 En ligne : https://doi.org/10.3138/carto.46.4.211 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31377 [article]

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031-2011041	SL	Revue	Centre de documentation	Revues en salle	Disponible

Development of an open-source toolbox for the analysis and visualization of remotely sensed time series / C. Block in Cartographica, vol 46 n° 4 (December 2011)  

Public [article]  inCartographica > vol 46 n° 4 (December 2011) . - pp 227 - 238 Titre : Development of an open-source toolbox for the analysis and visualization of remotely sensed time series Type de document : Article/Communication Auteurs : C. Block, Auteur ; Ulanbek Turdukulov, Auteur ; et al., Auteur Année de publication : 2011 Article en page(s) : pp 227 - 238 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique [Termes IGN] analyse spatiale [Termes IGN] analyse visuelle [Termes IGN] fonctionnalité [Termes IGN] image satellite [Termes IGN] logiciel de visualisation [Termes IGN] logiciel libre [Termes IGN] série temporelle Résumé : (Auteur) The GEONETCast data-dissemination system delivers free multi-source raw satellite images and processed products to users worldwide; from these data, users can construct long time series to study dynamic phenomena. To explore these dynamics, using an animation with few controls is common practice. But animations easily produce information overload leading to change blindness, a problem that can be addressed in various ways. We present a combination of analytical and visual functionalities to better support visual exploration of animated time series. Analytical pre-processing functions include slicing and tracking of objects of interest. Results of the slicing and the tracking are input to the visualization environment, which is further enriched by tools to make various time, attribute, and area selections and by options to visually enhance selections relative to their surroundings, visualize the path of moving objects, and multiple layers. The resulting toolbox is dedicated to visual exploration and analysis of dynamic phenomena in time series. A case study demonstrates, with a use scenario, how it works. Early exposure of some visualization functions to users has already led to improvements, but more extensive testing will follow after further enrichment of the toolbox. Directions of future research are described. Numéro de notice : A2011-484 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.3138/carto.46.4.227 En ligne : https://doi.org/10.3138/carto.46.4.227 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31378 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
031-2011041	SL	Revue	Centre de documentation	Revues en salle	Disponible