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A methodological framework for researching the usability of the space-time cube / Irma Kveladze in Cartographic journal (the), vol 50 n° 3 (August 2013)  

Public [article]  inCartographic journal (the) > vol 50 n° 3 (August 2013) . - pp 201 - 210 Titre : A methodological framework for researching the usability of the space-time cube Type de document : Article/Communication Auteurs : Irma Kveladze, Auteur Année de publication : 2013 Article en page(s) : pp 201 - 210 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale [Termes IGN] analyse spatio-temporelle [Termes IGN] convivialité [Termes IGN] cube espace-temps [Termes IGN] exploration de données géographiques [Termes IGN] visualisation de données Résumé : (Auteur) In recent years, an increased interest in the use of the Space-Time Cube (STC) to visualize movement data can be witnessed. However, little is known about whether the cube is truly efficient and effective to satisfactorily display complex movement datasets. The limited usability research that has been done did not lead to details on how the STC content should be designed and whether the cartographic design influences the exploration process. The conceptual framework that is proposed in this paper offers an approach to the evaluation of the STC content with special attention for design aspects and the environment in which the STC has to function. Systematic usability studies have to identify the strengths and weaknesses of the STC under different conditions. Therefore, the framework contains phased studies in which real-world data of four use cases of different complexity are used. Numéro de notice : A2013-461 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1179/1743277413Y.0000000061 En ligne : https://doi.org/10.1179/1743277413Y.0000000061 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32599 [article]

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Z-axis based visualization of map elements - cartographic experiences with 3D monitors using lenticular foil technology / Kai Bröhmer in Cartographic journal (the), vol 50 n° 3 (August 2013)  

Public [article]  inCartographic journal (the) > vol 50 n° 3 (August 2013) . - pp 211 - 217 Titre : Z-axis based visualization of map elements - cartographic experiences with 3D monitors using lenticular foil technology Type de document : Article/Communication Auteurs : Kai Bröhmer, Auteur ; Claudia Knust, Auteur ; et al., Auteur Année de publication : 2013 Article en page(s) : pp 211 - 217 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique [Termes IGN] carte thématique [Termes IGN] cartographie 3D [Termes IGN] données localisées 3D [Termes IGN] visualisation 3D Résumé : (Auteur) The current advent of autostereoscopic monitors and TV screens using lenticular foil technology proves the increasing desire to visualize movies, pictures, graphics or even maps in true-3D. These techniques could expand the cartographic ‘tool box’ drastically, implying that 3D is no longer limited to the well-known representation of landform characteristics. Major map design aspects of multi-image models have been analyzed and evaluated regarding their use in thematic cartography. For map design using lenticular foil technology empirical findings are necessary to position layers adequately along the z-axis of a 3D depiction. Hovering layers may generate additional information values, which seem to be able to compensate the shortcomings in 2D maps. Several parameters or dimensions of cartographic contents can be displayed simultaneously. True-3D display techniques must be implemented in a differentiated manner to achieve positive impacts on cartographic communication. However, lenticular foil technique opens perspectives for more diverse products in thematic cartography. Numéro de notice : A2013-462 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1179/1743277413Y.0000000063 En ligne : https://doi.org/10.1179/1743277413Y.0000000063 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32600 [article]

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Developing a framework for describing and comparing indoor maps / Alexander Salveson Nossum in Cartographic journal (the), vol 50 n° 3 (August 2013)  

Public [article]  inCartographic journal (the) > vol 50 n° 3 (August 2013) . - pp 218 - 224 Titre : Developing a framework for describing and comparing indoor maps Type de document : Article/Communication Auteurs : Alexander Salveson Nossum, Auteur Année de publication : 2013 Article en page(s) : pp 218 - 224 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique [Termes IGN] analyse comparative [Termes IGN] carte d'intérieur [Termes IGN] données descriptives [Termes IGN] positionnement en intérieur [Termes IGN] visualisation cartographique Résumé : (Auteur) Traditionally, research on cartography has primarily been focused on visualisation of outdoor environments. Recently, however, indoor cartography has increasingly attracted attention both from the academic world and from commercial enterprises. Indoor cartography calls for markedly different visualisation strategies. Frameworks for describing map communication and use exist for general maps. But so far, no such framework exists for indoor maps. This article presents and discusses several map types for indoor spaces found in the literature and commercial products. The different characteristics of each one are identified and described. On this basis, a framework for indoor maps is developed and presented. Arbitrary indoor maps can be described by their properties using the framework. This allows indoor maps to be compared and described using a common platform. Numéro de notice : A2013-463 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1179/1743277413Y.0000000055 En ligne : https://doi.org/10.1179/1743277413Y.0000000055 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32601 [article]

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Visual discovery of synchronisation in weather data at multiple temporal resolutions / Xiaojing Wu in Cartographic journal (the), vol 50 n° 3 (August 2013)  

Public [article]  inCartographic journal (the) > vol 50 n° 3 (August 2013) . - pp 247 - 256 Titre : Visual discovery of synchronisation in weather data at multiple temporal resolutions Type de document : Article/Communication Auteurs : Xiaojing Wu, Auteur ; Raul Zurita-Milla, Auteur ; Menno-Jan Kraak, Auteur Année de publication : 2013 Article en page(s) : pp 247 - 256 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale [Termes IGN] analyse diachronique [Termes IGN] calcul matriciel [Termes IGN] carte de Kohonen [Termes IGN] distribution spatiale [Termes IGN] données hétérogènes [Termes IGN] données météorologiques [Termes IGN] données multitemporelles [Termes IGN] série temporelle [Termes IGN] synchronisation Résumé : (Auteur) Analysing spatio-temporal weather patterns is fundamental to better understand the system Earth. Such patterns depend on the spatial and temporal resolution of the available data. Here, we study a particular spatio-temporal pattern, namely, synchronisation, and how this is affected by different temporal resolutions and temporal heterogeneity. Twenty years of daily temperature data collected in 28 Dutch meteorological stations are used as case study. Given the complexity of the analysis, we propose a geovisual analytic approach based on self-organizing maps (SOMs). This approach allows exploring the data from two perspectives: (1) station-based, in which spatially synchronous weather stations are grouped into clusters; and (2) year-based, in which temporal synchronisation is analysed using a calendar year as basic unit and similar years are clustered. Clusters are identified using the SOM U-matrices and maps. Next, the spatial distribution of synchronous stations is displayed in the geographic space. Trend plots are used to illustrate trends in every cluster and the temperatures of stations and years are compared with the corresponding cluster representative values to identify anomalies in the temperature records. The analysis is repeated at daily, weekly and monthly resolutions to study the effects of different temporal resolutions on synchronisation. Also daily spatial synchronisation results for all years with those for groups of daily synchronous years are analysed to study the effects of temporal heterogeneity. Results show that synchronisation results are different at different temporal resolutions. Monthly results are the most stable ones both in station-based and year-based. It is also observed that spatial synchronisation results are simplified when considering temporal heterogeneity. Numéro de notice : A2013-464 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1179/1743277413Y.0000000067 En ligne : https://doi.org/10.1179/1743277413Y.0000000067 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32602 [article]

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Clutter reduction methods for point symbols in map mashups / Jari Korpi in Cartographic journal (the), vol 50 n° 3 (August 2013)  

Public [article]  inCartographic journal (the) > vol 50 n° 3 (August 2013) . - pp 257 - 265 Titre : Clutter reduction methods for point symbols in map mashups Type de document : Article/Communication Auteurs : Jari Korpi, Auteur ; Paula Ahonen-Rainio, Auteur Année de publication : 2013 Article en page(s) : pp 257 - 265 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique [Termes IGN] agrégation de détails [Termes IGN] application composite [Termes IGN] figuré ponctuel [Termes IGN] généralisation cartographique automatisée [Termes IGN] placement automatique des signes conventionnels [Termes IGN] réduction Résumé : (Auteur) Map mashups are often visually chaotic and methods for solving this chaos are required. We introduce a set of clutter reduction criteria for evaluating methods to reduce clutter in map mashups. We present a synthesis of cartographic generalisation operators for point data and clutter reduction methods used in information visualisation and evaluate the methods against the criteria. The resulting evaluation table can be used in finding suitable clutter reduction methods for cases of map mashups with different primary criteria, and more specifically in finding methods that cover each others’ limitations. Numéro de notice : A2013-465 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1179/1743277413Y.0000000065 En ligne : https://doi.org/10.1179/1743277413Y.0000000065 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32603 [article]

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Towards 4D cartography - four-dimensional dynamic maps for understanding spatio-temporal correlations in lightning events / Bernd Resch in Cartographic journal (the), vol 50 n° 3 (August 2013)  

Public [article]  inCartographic journal (the) > vol 50 n° 3 (August 2013) . - pp 266 - 275 Titre : Towards 4D cartography - four-dimensional dynamic maps for understanding spatio-temporal correlations in lightning events Type de document : Article/Communication Auteurs : Bernd Resch, Auteur ; Florian Hillen, Auteur ; et al., Auteur Année de publication : 2013 Article en page(s) : pp 266 - 275 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Cartographie [Termes IGN] analyse spatio-temporelle [Termes IGN] cartographie dynamique [Termes IGN] dimension temporelle [Termes IGN] données spatiotemporelles [Termes IGN] visualisation 4D [Termes IGN] visualisation dynamique Résumé : (Auteur) While graphic variables in 2D maps have been extensively investigated, 4D cartography is still a widely unexplored field. In this paper, we investigate the usefulness of 4D maps (three spatial dimensions plus time) for cartographically illustrating spatio-temporal environmental phenomena. The presented approach focuses mostly on explorative research rather than on enhancement and extension of existing methods and principles. The user study described in the paper shows that 4D cartography is not a well-explored research area and that many experienced map users try to apply their knowledge from 2D maps to 4D dynamic visualisations. Thus, in order to foster the discussion within the community, we formulated several basic research questions for the area of 4D cartography, which range from methods for representing time in 4D visualisations and understanding the temporal context to finding generic methods to achieve optimized temporal generalisation and a consistent definition of graphical variables for 3D and 4D. Numéro de notice : A2013-466 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1179/1743277413Y.0000000062 En ligne : https://doi.org/10.1179/1743277413Y.0000000062 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32604 [article]

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Topologically safe curved schematisation / Arthur Van Goethem in Cartographic journal (the), vol 50 n° 3 (August 2013)  

Public [article]  inCartographic journal (the) > vol 50 n° 3 (August 2013) . - pp 276 - 285 Titre : Topologically safe curved schematisation Type de document : Article/Communication Auteurs : Arthur Van Goethem, Auteur ; Wouter Meulemans, Auteur ; Andreas W. Reimer, Auteur ; et al., Auteur Année de publication : 2013 Article en page(s) : pp 276 - 285 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées [Termes IGN] courbe [Termes IGN] courbe de Bézier [Termes IGN] diagramme de Voronoï [Termes IGN] généralisation automatique de données [Termes IGN] généralisation cartographique automatisée [Termes IGN] intégrité topologique [Termes IGN] simplification de contour Résumé : (Auteur) Traditionally schematised maps make extensive use of curves. However, automated methods for schematisation are mostly restricted to straight lines. We present a generic framework for topology-preserving curved schematisation that allows a choice of quality measures and curve types. The framework fits a curve to every part of the input. It uses Voronoi diagrams to ensure that curves fitted to disjoint parts do not intersect. The framework then employs a dynamic program to find an optimal schematisation using the fitted curves. Our fully-automated approach does not need critical points or salient features. We illustrate our framework with Bézier curves and circular arcs. Numéro de notice : A2013-467 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1179/1743277413Y.0000000066 En ligne : https://doi.org/10.1179/1743277413Y.0000000066 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32605 [article]

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