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Perceptually shaded slope maps for the visualization of digital surface models / Thomas J. Pingel in Cartographica, vol 49 n° 4 (Winter 2014)  

Public [article]  inCartographica > vol 49 n° 4 (Winter 2014) . - pp 225 - 240 Titre : Perceptually shaded slope maps for the visualization of digital surface models Type de document : Article/Communication Auteurs : Thomas J. Pingel, Auteur ; Keith C. Clarke, Auteur Année de publication : 2014 Article en page(s) : pp 225 - 240 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques [Termes IGN] analyse visuelle [Termes IGN] données lidar [Termes IGN] données localisées 3D [Termes IGN] estompage automatique [Termes IGN] lisibilité perceptive [Termes IGN] modèle numérique de surface [Termes IGN] ombre [Termes IGN] relief [Termes IGN] représentation du relief [Termes IGN] visualisation de données Résumé : (Auteur) Although shaded relief, or hillshaded, images are a widely used method to represent high-resolution (~1-m) digital surfaces derived from airborne laser (or LiDAR) scans, such displays may become difficult to interpret when they include surface features like buildings, roadways, and natural vegetation. One possible alternative as a visualization of such surface models is a representation based on slope shading – the steeper, the darker – but attenuated to the perceptual bias of overestimation of slope. The empirical work presented here demonstrates that Perceptually Shaded Slope Maps (PSSMs) perform as well or better than either hillshaded or hypsometric images on map-reading tasks, including profile estimation and mental rotation. Numéro de notice : A2014-650 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.3138/carto.49.4.2141 En ligne : http://dx.doi.org/10.3138/carto.49.4.2141 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=75098 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
031-2014041	RAB	Revue	Centre de documentation	En réserve L003	Disponible

A new database visualization framework for the automatic construction of non-standard charts: re-creating the Chart of Napoleon’s russian campaign of 1812 / Wei Shi in Cartographica, vol 49 n° 4 (Winter 2014)  

Public [article]  inCartographica > vol 49 n° 4 (Winter 2014) . - pp 241 - 261 Titre : A new database visualization framework for the automatic construction of non-standard charts: re-creating the Chart of Napoleon’s russian campaign of 1812 Type de document : Article/Communication Auteurs : Wei Shi, Auteur ; Randy Goebel, Auteur ; Tanaka Yuzuru, Auteur Année de publication : 2014 Article en page(s) : pp 241 - 261 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique [Termes IGN] base de données hiérarchique [Termes IGN] base de données localisées [Termes IGN] carte ancienne [Termes IGN] diagramme [Termes IGN] visualisation de données Résumé : (Auteur) In the last decade, research on database visualization has made great progress in automatically constructing charts composed of standard primitive charts. The next research challenge is to automatically construct non-standard charts which cannot be simply composed with standard primitive types of charts. One typical example is the chart of Napoleon’s Russian campaign of 1812. As to the challenge of automatic construction of such complex charts, we may classify conventional visualization frameworks into two categories. The first category asks users to procedurally define non-standard charts by programming. The second category asks users to declaratively define non-standard charts with their logical specification using a given library of graphical objects. Here we will propose a new visualization framework in the second category for automatically constructing non-standard charts from their logical specifications and discuss how to apply our framework to create custom-made geovisualization charts. Such a specification is described by one or more pairs of data view schemata (DVSs) and chart view schemata (CVSs). Each DVS is used for manipulating the data store in a database. Each CVS is used for defining the rendered appearances of the different chart components. Using our framework, users can easily re-create and extend such complex non-standard charts as the chart of Napoleon’s campaign by simply providing their logical specifications. Numéro de notice : A2014-651 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.3138/carto.49.4.2487 En ligne : http://dx.doi.org/10.3138/carto.49.4.2487 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=75099 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
031-2014041	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Visual accceptance of library-generated CityGML LOD3 building models / Ryan Garnett in Cartographica, vol 49 n° 4 (Winter 2014)  

Public [article]  inCartographica > vol 49 n° 4 (Winter 2014) . - pp 218 - 224 Titre : Visual accceptance of library-generated CityGML LOD3 building models Type de document : Article/Communication Auteurs : Ryan Garnett, Auteur ; Jason T. Freeburn, Auteur Année de publication : 2014 Article en page(s) : pp 218 - 224 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] CityGML [Termes IGN] données localisées 3D [Termes IGN] géométrie [Termes IGN] modèle conceptuel de données localisées [Termes IGN] modèle numérique du bâti [Termes IGN] niveau de détail [Termes IGN] qualité des données [Termes IGN] rendu réaliste [Termes IGN] texture d'image [Termes IGN] visualisation 3D [Vedettes matières IGN] Géovisualisation Résumé : (auteur) The acceptance of 3D building models is critical to all urban 3D visualization projects. Building models that are identified as unacceptable can increase the cost of the project, delay the delivery, and, in some cases, cancel the acceptance of the entire project. A 3D modelling approach of using representative textures and geometry rather than actual photorealistic textures and geometry was conducted to determine whether participants who frequent the building multiple times a week over a period of a year would be able to identify the visual difference. Three focus groups were established and used to evaluate the visual quality of the 3D building models. Participants were asked to rank the visual quality of the building, as well as identifying any geometry, texture, or overall visual quality problems. The participants from the three focus groups did not identify any texture or geometry mistakes present in the building models. The overall visual quality identified by the participants from the three focus groups was above average, suggesting that the 3D modelling approach is an effective means for modelling buildings with high visitation and significance. Numéro de notice : A2014-688 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/IMAGERIE/INFORMATIQUE Nature : Article DOI : 10.3138/carto.49.4.2522 En ligne : http://dx.doi.org/10.3138/carto.49.4.2522 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=75194 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
031-2014041	RAB	Revue	Centre de documentation	En réserve L003	Disponible