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Conceptualizing space and time: a classification of geographic movement / N.J. Yattaw in Cartography and Geographic Information Science, vol 26 n° 2 (April 1999)  

Public [article]  inCartography and Geographic Information Science > vol 26 n° 2 (April 1999) . - pp 85 - 98 Titre : Conceptualizing space and time: a classification of geographic movement Type de document : Article/Communication Auteurs : N.J. Yattaw, Auteur Année de publication : 1999 Article en page(s) : pp 85 - 98 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Infrastructure de données [Termes IGN] distance [Termes IGN] données spatiotemporelles [Termes IGN] espace [Termes IGN] espace-temps [Termes IGN] ontologie [Termes IGN] phénomène géographique [Termes IGN] temps Résumé : (Auteur) In an increasingly complex and interactive world, the need to study, manage, and understand the critical interface between physical and human environments is becoming more urgent, precipitating technological advancements in the dynamic spatiotemporal capabilities of geographic information systems (GIS) and associated visualization and representational techniques. Such efforts require a thorough knowledge of the intrinsic characteristics associated with changes in space and time. A comprehensive understanding of the underlying dynamic structure associated with movement is necessary before accurate, integrative, and insightful analyses, explanations, and representations of complex, geographically dynamic phenomena can be performed. Using the logical subdivision method of classification, geographic movement is conceptualized by its abstract spatial and temporal components creating a matrix of 12 unique classes characterizing the form of movement. The organization is a simplified framework that offers a movement language with which to describe the movements associated with diverse geographic phenomena. Classifying geographic movement by its changes in time and space serves as a useful construct that facilitates the comprehension of the general ideas and principles intrinsic to geographical patterns and processes and provides a solid foundation for representing and understanding complex geographic phenomena. Numéro de notice : A1999-178 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1559/152304099782330734 En ligne : https://doi.org/10.1559/152304099782330734 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26375 [article]

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"Time travel" visualization in a dynamic Voronoi data structure / D. Mioc in Cartography and Geographic Information Science, vol 26 n° 2 (April 1999)  

Public [article]  inCartography and Geographic Information Science > vol 26 n° 2 (April 1999) . - pp 99 - 108 Titre : "Time travel" visualization in a dynamic Voronoi data structure Type de document : Article/Communication Auteurs : D. Mioc, Auteur ; F. Anton, Auteur ; Christopher Gold, Auteur ; Bruno Moulin, Auteur Année de publication : 1999 Article en page(s) : pp 99 - 108 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] animation graphique [Termes IGN] diagramme de Voronoï [Termes IGN] durée de trajet [Termes IGN] objet géographique [Termes IGN] système d'information géographique [Termes IGN] visualisation dynamique [Vedettes matières IGN] Géovisualisation Résumé : (Auteur) It is now widely recognized that incremental changes of cartographic data evolving in space and time cannot be maintained easily within current GISs, and therefore visualization of such changes is limited to series of "snapshots" of cartographic data. Recent research on dynamic spatial data structures based on Voronoi diagrams provides new opportunities for dynamic visuali-zation in GIS. In this paper we present a new approach for representing and visualizing carto-graphic data changing in time and space. Our approach of visualization integrates reverse execution of the performed actions and the history of map construction. We use this map history for visualizing any state of the underlying Voronoi data structure via "time travel." The approach emphasizes several research efforts: on the formalization of the operations upon spatial objects in a dynamic Voronoi spatial data structure, the reversibility of its map construction commands, and their applicability to map visualization and map animation. Numéro de notice : A1999-179 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1559/152304099782330761 En ligne : https://doi.org/10.1559/152304099782330761 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26376 [article]

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Representation and manipulation of moving points: an extended data model for location estimation / J. Moreira in Cartography and Geographic Information Science, vol 26 n° 2 (April 1999)  

Public [article]  inCartography and Geographic Information Science > vol 26 n° 2 (April 1999) . - pp 109 - 123 Titre : Representation and manipulation of moving points: an extended data model for location estimation Type de document : Article/Communication Auteurs : J. Moreira, Auteur ; C. Ribeiro, Auteur ; J.M. Saglio, Auteur Année de publication : 1999 Article en page(s) : pp 109 - 123 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées [Termes IGN] espace-temps [Termes IGN] imprécision géométrique [Termes IGN] modèle conceptuel de données localisées [Termes IGN] objet mobile [Termes IGN] système d'information géographique [Termes IGN] système de gestion de bases de données relationnelles Résumé : (Auteur) In this paper we introduce a classification for spatiotemporal systems based on the properties of the represented objects. Building on this classification, we assert that complex objects can be derived from simpler ones, following an evolutionary approach which starts with the study of simple objects and ends by enriching them with new features. This paper focuses on the definition of a data model for the representation of moving points. The model is based on the decomposition of the trajectory of moving points into sections. The movement within each section of a trajectory is described by a variability function. Because for most systems it is not possible to store the exact knowledge about the movement of an object, the answers to queries may be imprecise. We propose two additional approaches to deal with imprecision the superset and the subset semantics based on a maximum value for the variability function, and a smooth technique to integrate them in the model. Finally, we analyze certain functional aspects of the implementation of the data model in a Relational Database Management System (RDBMS) and outline directions for future research. Numéro de notice : A1999-180 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1559/152304099782330725 En ligne : https://doi.org/10.1559/152304099782330725 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26377 [article]

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Spatio-temporal interpolation and fuzzy logic for GIS simulation of rural-to-urban transition / Suzana Dragićević in Cartography and Geographic Information Science, vol 26 n° 2 (April 1999)  

Public [article]  inCartography and Geographic Information Science > vol 26 n° 2 (April 1999) . - pp 125 - 137 Titre : Spatio-temporal interpolation and fuzzy logic for GIS simulation of rural-to-urban transition Type de document : Article/Communication Auteurs : Suzana Dragićević, Auteur ; D.J. Marceau, Auteur Année de publication : 1999 Article en page(s) : pp 125 - 137 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes d'information géographique [Termes IGN] espace-temps [Termes IGN] GRASS [Termes IGN] incertitude des données [Termes IGN] interpolation [Termes IGN] logique floue [Termes IGN] métropole [Termes IGN] Montréal (Québec) [Termes IGN] simulation [Termes IGN] système d'information géographique [Termes IGN] transformation [Termes IGN] urbanisation Résumé : (Auteur) When studying dynamic geographic phenomena such as rural-urban transformation in a raster GIS environment, information between two consecutive snapshot layers may not be available. This paper describes an application of fuzzy logic which enables the completion of unknown information in generated intermediate layers using annual temporal resolution and spatiotemporal interpolation. Change is modeled temporally by performing three possible scenarios with a different duration of rural-urban transition, and spatially by applying two standard GIS methods. This methodology is tested with data from the Montreal Metropolitan area in Quebec, Canada, which cover the 1956 to 1986 period and have a temporal resolution of 10 years. Userfriendly modules were developed and incorporated in GRASS 4.1 environment in order to simulate the spatio-temporal changes which occur in the study area. Numéro de notice : A1999-181 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1559/152304099782330707 En ligne : https://doi.org/10.1559/152304099782330707 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26378 [article]

Exemplaires(1)

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Visualization of relationships between spatial patterns in time by cartographic animation / Connie Blok in Cartography and Geographic Information Science, vol 26 n° 2 (April 1999)  

Public [article]  inCartography and Geographic Information Science > vol 26 n° 2 (April 1999) Titre : Visualization of relationships between spatial patterns in time by cartographic animation Type de document : Article/Communication Auteurs : Connie Blok, Auteur ; B. Kobben, Auteur ; A.A. Kuterema, Auteur Année de publication : 1999 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Cartographie numérique [Termes IGN] cartographie animée [Termes IGN] données localisées numériques [Termes IGN] espace-temps [Termes IGN] synchronisation [Termes IGN] transport collectif [Termes IGN] visualisation dynamique Résumé : (Auteur) This paper deals with dynamic visualization methods. The focus is on synchronization, one of the aspects that can dynamically control visualization. Synchronization refers to the possibility of running several animations simultaneously and manipulating their starting points in display time to discover relationships. The literature provides examples where animations are juxtaposed to discover (usually) causal relations. Can synchronization be relevant for other relationships ? How complex is its application in practice ? And are there alternatives for the perceptually difficult juxtaposing of animations ? We investigated design options for the visual exploration and analysis of three relationships between spatial patterns in time : convergence, similarity, and stability. For each relationship we used two data sets to produce experimental designs, in which we tried to incorporate knowledge on vision and cognition. It seems useful to distinguish between synchronization in world and in display time. If it is not necessary to view the data sets separately and to manipulate them independently in display time, one animation is sufficient. In other cases, two animations and, sometimes, alternative options for juxtaposing seem useful. However, empirical testing is still required to determine whether the proposed tools are effective. The experimental designs discussed in this paper are published on the Web. Numéro de notice : A1999-182 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1559/152304099782330716 En ligne : https://doi.org/10.1559/152304099782330716 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26379 [article]

Exemplaires(1)

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The use of GIS for the visual exploration of archaeological spatio-temporal data / A. Koussoulakou in Cartography and Geographic Information Science, vol 26 n° 2 (April 1999)  

Public [article]  inCartography and Geographic Information Science > vol 26 n° 2 (April 1999) . - pp 152 - 160 Titre : The use of GIS for the visual exploration of archaeological spatio-temporal data Type de document : Article/Communication Auteurs : A. Koussoulakou, Auteur ; Efstratios Stylianidis, Auteur Année de publication : 1999 Article en page(s) : pp 152 - 160 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG [Termes IGN] archéométrie [Termes IGN] données spatiotemporelles [Termes IGN] fouille archéologique [Termes IGN] grotte [Termes IGN] site archéologique [Termes IGN] système d'information géographique [Termes IGN] visualisation Résumé : (Auteur) A system for managing and visualizing archaelogical finds and their spatio-temporal properties is presented. The system is an attempt to combine archeolgists' interest to keep track of time with interests related to the representation and visualization of the spatio-temporal component of archeological excavations, with the help of cartographic and GIS methods and techniques. Several parameters of a prehistoric excavation such as finds, their thematic characteristics and their spatio-temporal distributions are examined. A three-dimensional GIS/cartographic environment and its user interface to the excavation database have been developped as a tool for enhancing archeological interpretation in an exploratory environment. The development of the system is an ongoing task ; the article describes its current use as a prototype. Numéro de notice : A1999-183 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1559/152304099782330743 En ligne : https://doi.org/10.1559/152304099782330743 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26380 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
032-99021	RAB	Revue	Centre de documentation	En réserve L003	Disponible