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Auteur Menno-Jan Kraak |
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Geospatial data infrastructure portals: using the national atlas as a metaphor / T. Aditya in Cartographica, vol 41 n° 2 (June 2006)
[article]
Titre : Geospatial data infrastructure portals: using the national atlas as a metaphor Type de document : Article/Communication Auteurs : T. Aditya, Auteur ; Menno-Jan Kraak, Auteur Année de publication : 2006 Article en page(s) : pp 115 - 133 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Infrastructure de données
[Termes IGN] accès aux données localisées
[Termes IGN] ArcIms
[Termes IGN] atlas numérique
[Termes IGN] diffusion de données
[Termes IGN] données localisées
[Termes IGN] infrastructure nationale des données localisées
[Termes IGN] métadonnées
[Termes IGN] métadonnées géographiques
[Termes IGN] portail
[Termes IGN] prototypeRésumé : (Auteur) Le concept de l'infrastructure des données géospatiales a été mis en pratique dans certains pays au moyen de portails qui permettent aux utilisateurs de chercher de multiples données géospatiales. D'après notre étude, les portails actuels comporteraient deux problèmes : l'inadéquation des outils de navigation et l'absence de soutien aux utilisateurs. Dans l'article, on propose une nouvelle approche en matière d'élaboration de portails en se servant des atlas comme métaphore. Cette approche suggère de se servir des atlas non seulement pour accéder à diverses cartes thématiques, mais aussi pour découvrir des ensembles de données. Dans les atlas, la structure de l'information joue un rôle important dans l'organisation du contenu. Les métadonnées publiées par les fournisseurs sont incorporées dans cette structure sous forme de résumés. Selon la pertinence particulière des données, chaque résumé est lié à une carte précise portant sur un sujet donné. Ces résumés peuvent être représentés sous forme de symboles afin d'appuyer les tâches de découvertes d'information, quelles soient superficiellement ou rigoureusement définies. Pour les tâches superficielles, on peut fureter dans les interfaces de navigation et les cartes, tandis que pour les travaux plus rigoureux , on peut effectuer une recherche dans les interfaces d'exploration et de recherche dans les présentations. Un prototype fonctionnel permettant aux utilisateurs de fureter et d'effecturer des recherches a été élaboré avec la technologie ArcIMS basée sur le logiciel Flash. Que l'utilisateur procède à un furetage ou à une recherche, il peut choisir des interfaces pour évaluer efficacement la pertinence des données. Copyright University of Toronto Press. Numéro de notice : A2006-289 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.3138/P3P1-5327-X2QK-616M En ligne : https://doi.org/10.3138/P3P1-5327-X2QK-616M Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28016
in Cartographica > vol 41 n° 2 (June 2006) . - pp 115 - 133[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 031-06021 RAB Revue Centre de documentation En réserve L003 Disponible Evaluating the usability of visualization methods in an exploratory geovisualization environment / E.L. Koua in International journal of geographical information science IJGIS, vol 20 n° 4 (april 2006)
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Titre : Evaluating the usability of visualization methods in an exploratory geovisualization environment Type de document : Article/Communication Auteurs : E.L. Koua, Auteur ; Alan M. MacEachren, Auteur ; Menno-Jan Kraak, Auteur Année de publication : 2006 Article en page(s) : pp 425 - 448 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Intelligence artificielle
[Termes IGN] carte de Kohonen
[Termes IGN] découverte de connaissances
[Termes IGN] données socio-économiques
[Termes IGN] exploration de données
[Termes IGN] visualisation cartographiqueRésumé : (Auteur) The use of new representation forms and interactive means to visualize geospatial data requires an understanding of the impact of the visual tools used for data exploration and knowledge construction. Use and usability assessment of implemented methods and tools is an important part of our efforts to build this understanding. Based on an approach to combine visual and computational methods for knowledge discovery in large geospatial data, an integrated visualization-geocomputation environment has been developed based on the Self-Organizing Map (SOM), the map and the parallel coordinate plot. This environment allows patterns and attribute relationships to be explored. A use and usability assessment is conducted to evaluate the ability of each of these visual representations to meet user performance and satisfaction goals. In the test, different representations are compared while exploring a socio-demographic dataset. Numéro de notice : A2006-181 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1080/13658810600607550 En ligne : https://doi.org/10.1080/13658810600607550 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27908
in International journal of geographical information science IJGIS > vol 20 n° 4 (april 2006) . - pp 425 - 448[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 079-06041 RAB Revue Centre de documentation En réserve L003 Disponible 079-06042 RAB Revue Centre de documentation En réserve L003 Disponible
Titre : Modeling and visualizing dynamic landscape objects and their qualities Type de document : Thèse/HDR Auteurs : Daniel van de Vlag, Auteur ; Alfred Stein, Directeur de thèse ; Menno-Jan Kraak, Directeur de thèse Editeur : Enschede [Pays Bas] : University of Twente Année de publication : 2006 Collection : ITC Dissertation num. 132 Importance : 170 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-90-8504-384-3 Note générale : bibliographie Langues : Français (fre) Descripteur : [Vedettes matières IGN] Analyse spatiale
[Termes IGN] analyse multivariée
[Termes IGN] arbre de décision
[Termes IGN] classification ascendante hiérarchique
[Termes IGN] données spatiotemporelles
[Termes IGN] incertitude des données
[Termes IGN] objet géographique
[Termes IGN] ontologieIndex. décimale : THESE Thèses et HDR Résumé : (auteur) This thesis focuses on modeling and visualizing dynamic landscape objects and their qualities. It contains ontologies to characterize and model dynamic landscape features using spatial data. It considers their spatial data qualities and visualizes them by explorative methods. In this study, the dynamic landscape features are derived from a coastal movement application within the Netherlands, whereby beaches are subject to nourishment due to severe erosion. The description and classification of beach objects and their processes essentially grounds on the perception of the coastal landscape. Modeling a landscape is a basic agreement on the conceptualization of these features and processes. The aim is to develop a framework for conceptualization of dynamic beach objects, to understand the physical processes involved and to illustrate decision rules adopted in classification of these objects. Also, quality issues related to beach nourishments are studied, visualized and explored, using new visualization techniques. A domain-specific ontology can serve as a framework for the conceptualization of beach objects and their processes. The discrimination into product and problem ontology supports the guidance for classification of these objects and to elucidate which data ‘fit for use’. Data qualities are assessed using a quality matrix, where ontological features are portrayed against quality elements. Elements of positional, thematic and temporal accuracy and data completeness are considered of high importance for the beach nourishment application. The problem and product ontology helps to define two scenarios; the first determined by the regulations from the Ministry for Public Works; the second grounded on the abilities from an existing spatial dataset. A comparison between them shows that 72.8% of the objects suitable and non-suitable for nourishment are correctly classified. A higher overlap is found in areas where actual beach nourishments were carried out. Inaccuracies in attributes, i.e. altitude, vegetation and wetness, influence the determination of the objects. A sensitivity analysis applied on altitude shows that determinate boundaries for beach nourishment objects are not reasonable and consequently should be treated as vague objects. The ontology for beach objects is extended with a spatio-temporal ontology that considers objects to be vague and dynamic. It contains full membership functions for crisp objects, partial membership functions for fuzzy objects and temporal membership functions for dynamic fuzzy objects. The temporal membership functions include seasonal changes of vegetation and daily changes in wetness. A sensitivity analysis shows that the calculated beach nourishment volumes are practically insensitive in relation to assumptions on the temporal membership functions. A spatio-temporal ontology, as an extent of a spatial ontology, is shown to model dynamic processes in landscape studies in a more realistic way. To classify a coastal landscape, I also consider the level of scale. Object hierarchy is essential but is often ignored when collecting and classifying landscape features. A fuzzy decision tree considers a hierarchical structure for classification based on decision rules on object attributes. These attributes are defined on the basis of uncertain parameters that may change in space and time. A Bayesian hierarchical model deals with modeling and handling this uncertainty. In the beach management application, Bayesian hierarchical modeling is applied to obtain posterior probability distributions for several boundary regions. The posterior distributions yield lower and upper limits of membership functions describing boundaries between object classes. In this way, a proper fuzzy decision tree is build that includes the inherent dynamic uncertainty. The spatial information of the application contains large multivariate and multi-temporal datasets. An integrated prototype for visualization and exploration of multivariate spatiotemporal datasets is introduced. It is applied to understand and explain the behaviour of dynamic beach objects and their uncertainties. It consists of the map environment (MAP), a parallel coordinate plot environment (PCP) for visualizing attributes of the dataset, and a temporal ordered space matrix environment (TOSM) for presenting spatio-temporal patterns. The TOSM is a new exploration method and can be seen as a schematized map, whereby the rows in the TOSM environment represent time, the columns represent geographic units, and individual cells are colored according to the value of user defined attributes. The prototype is applied on four case studies. A usability test is performed to test for the differences in the ability to detect patterns in multivariate spatio-temporal datasets for each environment. Test measures are efficiency, effectiveness and user’s satisfaction. Results show that the TOSM environment and the integrated prototype have significantly better performances in efficiency and user’s satisfaction than the MAP and PCP environment. Note de contenu : 1: Introduction
2: Ameland case study
3: An application of problem and product ontologies for the revision of beach nourishments
4: Modeling Dynamic Beach Objects Using Spatio-temporal Ontologies
5: Incorporating Uncertainty via Hierarchical Classification using Fuzzy Decision Trees
6: Temporal Ordered Space Matrix: Representation of Multivariate Spatio-temporal Data
7: ConclusionsNuméro de notice : 17248 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Thèse étrangère Note de thèse : PhD thesis : Géomatique : ITC : 2006 En ligne : http://library.wur.nl/WebQuery/wurpubs/348623 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=81878 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17248-01 THESE Livre Centre de documentation Thèses Disponible Deciding on fitness for use: evaluating the utility of sample maps as an element of geospatial metadata / Paula Ahonen-Rainio in Cartography and Geographic Information Science, vol 32 n° 2 (April 2005)
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Titre : Deciding on fitness for use: evaluating the utility of sample maps as an element of geospatial metadata Type de document : Article/Communication Auteurs : Paula Ahonen-Rainio, Auteur ; Menno-Jan Kraak, Auteur Année de publication : 2005 Article en page(s) : pp 101 - 112 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Infrastructure de données
[Termes IGN] évaluation des données
[Termes IGN] information géographique
[Termes IGN] métadonnées
[Termes IGN] métadonnées géographiques
[Termes IGN] outil d'aide à la décision
[Termes IGN] santé
[Termes IGN] visualisationRésumé : (Auteur) Metadata that describe characteristics of geographic datasets are used to discover potential datasets and evaluate their suitability for intended purposes. Here sample maps are suggested as tools for evaluating datasets. Their usefulness in this process was studied as part of a wider research on visualization of geospatial metadata. First, design concepts were tested with twelve subjects who commented different static presentations of sample maps and multivariate visualizations. Then a prototype of an interactive metadata environment composed of sample maps, textual metadata documents, and a parallel coordinate plot was tested with eighteen subjects whose task it was to select the most suitable dataset from among six alternatives each of which represented the same theme. The subjects determined suitalbilitv within a use scenario. The prototype proved to be a valuable tool in the evaluation process, especially because multiple maps could be compared. Numéro de notice : A2005-190 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1559/1523040053722114 En ligne : https://doi.org/10.1559/1523040053722114 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27327
in Cartography and Geographic Information Science > vol 32 n° 2 (April 2005) . - pp 101 - 112[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 032-05021 RAB Revue Centre de documentation En réserve L003 Disponible Interactive and visual fuzzy classification of remotely sensed imagery for exploration of uncertainty / Arko Lucieer in International journal of geographical information science IJGIS, vol 18 n° 5 (august 2004)
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Titre : Interactive and visual fuzzy classification of remotely sensed imagery for exploration of uncertainty Type de document : Article/Communication Auteurs : Arko Lucieer, Auteur ; Menno-Jan Kraak, Auteur Année de publication : 2004 Article en page(s) : pp 491 - 512 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] classification floue
[Termes IGN] image Landsat-ETM+
[Termes IGN] incertitude des données
[Termes IGN] interactivité
[Termes IGN] visualisationRésumé : (Auteur) In this study, we propose, describe, and demonstrate a new geovisualization tool to demonstrate the use of exploratory and interactive visualization techniques for a visual fuzzy classification of remotely sensed imagery. The proposed tool uses dynamically linked views, consisting of an image display, a parallel coordinate plot, a 3D feature space plot, and a classified map with an uncertainty map. It allows a geoscientist to interact with the parameters of a fuzzy classification algorithm by visually adjusting fuzzy membership functions and fuzzy transition zones of land-cover classes. The purpose of this tool is to improve insight into fuzzy classification of remotely sensed imagery and related uncertainty. We tested our tool with a visual fuzzy land-cover classification of a Landsat 7 ETM + image of an area ln southern France characterized by objects with indeterminate boundaries. Good results were obtained with the visual classifier. Additionally, a focus-group user test of the tool showed that insight into a fuzzy classification algorithm and classification uncertainty improved considerably. Numéro de notice : A2004-284 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1080/13658810410001658094 En ligne : https://doi.org/10.1080/13658810410001658094 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26811
in International journal of geographical information science IJGIS > vol 18 n° 5 (august 2004) . - pp 491 - 512[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 079-04051 RAB Revue Centre de documentation En réserve L003 Disponible Geovisualization illustrated / Menno-Jan Kraak in ISPRS Journal of photogrammetry and remote sensing, vol 57 n° 5-6 (April - May 2003)PermalinkCartography / Menno-Jan Kraak (2003)PermalinkPermalinkSpatial object aggregation based on data structure, local triangulation and hierarchical analyzing method / Liu Yaolin (2001)PermalinkWeb cartography / Menno-Jan Kraak (2001)PermalinkAbout maps, cartography, geovisualization and other graphics / Menno-Jan Kraak in Geoinformatics, vol 3 n° 8 (01/11/2000)PermalinkInteraction in virtual world views : linking 3D GIS with VR / Edward Verbree in International journal of geographical information science IJGIS, vol 13 n° 4 (July 1999)Permalinkvol 26 n° 2 - April 1999 - Dealing with time (Bulletin de Cartography and Geographic Information Science) / American congress on surveying and mappingPermalinkThe cartographic visualisation process : from presentation to exploration / Menno-Jan Kraak in Cartographic journal (the), vol 35 n° 1 (June 1998)PermalinkAdvances in GIS Research 2 : proceedings SDH'96, Volume 1. Proceedings of the 7th International symposium on spatial data handling SDH'96 / Menno-Jan Kraak (1996)PermalinkAdvances in GIS Research 2 : proceedings SDH'96, Volume 2. Proceedings of the 7th International symposium on spatial data handling SDH'96 / Menno-Jan Kraak (1996)PermalinkCartography / Menno-Jan Kraak (1996)PermalinkThree-dimensional [3D] map design / Menno-Jan Kraak in Cartographic journal (the), vol 30 n° 2 (December 1993)Permalink