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The influence of domain expertise on visual overviews of spatiotemporal data / Susanne Bleisch in International journal of cartography, vol 3 n° 2 (December 2017)
[article]
Titre : The influence of domain expertise on visual overviews of spatiotemporal data Type de document : Article/Communication Auteurs : Susanne Bleisch, Auteur ; Matt Duckham, Auteur ; Christopher Pettit, Auteur Année de publication : 2017 Article en page(s) : pp 166-186 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web
[Termes IGN] base de connaissances
[Termes IGN] base de données spatiotemporelles
[Termes IGN] exploration de données géographiques
[Termes IGN] géovisualisation
[Termes IGN] méta connaissanceRésumé : (auteur) Overviews of spatiotemporal data are acknowledged to play an important role in visualization in initiating and supporting geovisualization and exploratory data analysis (EDA). However, relatively little research has focused on the visual overviews themselves, and their potential impacts on EDA outcomes. In a user study, we evaluated the influence of different levels of domain knowledge on the usefulness of four distinct types of static visual overview of spatiotemporal data. Beyond simply orienting users, our results indicate that visual overviews can be important in gaining insights into a data set, for example, in learning about metadata. Although subjects without domain knowledge struggled to judge the quality of their findings, they were as successful at identifying interesting patterns in the data as those with domain expertise. Our results suggest that detailed background knowledge of a data set can actively hinder EDA. Being already familiar with their own data sets, our results highlight the tendency of data experts to disregard findings that do not match their pre-existing domain knowledge. Based on these findings, our conclusions identify a range of potential avenues for future work, including the use of visual overviews that deliberately do not, from first view, reveal the context of the data they show. This later approach could help in cases where domain experts need to see their data with ‘fresh eyes’, and detect interesting patterns in spatiotemporal data before relating the findings to specific knowledge about the data sets and the domain. Numéro de notice : A2017-684 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/23729333.2017.1294820 En ligne : https://.doi.org/10.1080/23729333.2017.1294820 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=87348
in International journal of cartography > vol 3 n° 2 (December 2017) . - pp 166-186[article]Applying VGI to collaborative research in the humanities: the case of ARTL@S / Catherine Dossin in Cartography and Geographic Information Science, Vol 44 n° 6 (November 2017)
[article]
Titre : Applying VGI to collaborative research in the humanities: the case of ARTL@S Type de document : Article/Communication Auteurs : Catherine Dossin, Auteur ; Nicole Ningning Kong, Auteur ; Béatrice Joyeux-Prunel, Auteur Année de publication : 2017 Article en page(s) : pp 521 - 538 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web
[Termes IGN] analyse diachronique
[Termes IGN] données localisées des bénévoles
[Termes IGN] partage de données localisées
[Termes IGN] système d'information géographiqueRésumé : (auteur) Using Artl@s as an example of a project that relies on volunteered geographic information (VGI), this article examines the specific challenges that exist, beyond those frequently discussed in general VGI systems (e.g., participants’ motivation and data quality control) in regard to sharing research data in humanities: (1) most data from the humanities is qualitative and collected from multiple data sources which are often inconsistent and unmappable; (2) data is usually interconnected with multiple relationships among different tables which creates challenges for both mapping and query functionality; (3) data is both geographical and historical. Consequently addresses that no longer exist have to be geolocated and visualized on historical basemaps and spaces must be represented diachronically; (4) the design of web map application needs to balance both sophisticated research requirements and a user-friendly interface; (5) finally contributors expect their data to be cited or acknowledged when used in other studies and users need metadata and citation information in order to reuse and repurpose datasets.
In this article, we discuss how Artl@s, a project which developed a georeferenced historical database of exhibition catalogues, addresses these challenges. Artl@s provides a case study for VGI adoption by digital humanities scholars for research data sharing, as it offers features, such as flexible batch data contribution, interrelated spatial query, automatic geolocalization of historical addresses, and data citation mechanisms.Numéro de notice : A2017-535 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/15230406.2016.1216804 En ligne : https://doi.org/10.1080/15230406.2016.1216804 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=86556
in Cartography and Geographic Information Science > Vol 44 n° 6 (November 2017) . - pp 521 - 538[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 032-2017061 RAB Revue Centre de documentation En réserve L003 Disponible An effective spherical panoramic LoD model for a mobile street view service / Xianxiong Liu in Transactions in GIS, vol 21 n° 5 (October 2017)
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Titre : An effective spherical panoramic LoD model for a mobile street view service Type de document : Article/Communication Auteurs : Xianxiong Liu, Auteur ; Qingwu Hu, Auteur ; Mingyao Ai, Auteur ; et al., Auteur Année de publication : 2017 Article en page(s) : pp 897 - 915 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web
[Termes IGN] Androïd
[Termes IGN] carte
[Termes IGN] image panoramique
[Termes IGN] navigation
[Termes IGN] niveau de détail
[Termes IGN] projection
[Termes IGN] réalité augmentée
[Termes IGN] scène urbaine
[Termes IGN] visualisation
[Termes IGN] visualisation 3D
[Termes IGN] Web View ServiceRésumé : (Auteur) Street view (panoramic view) services have begun to shift from PC platforms to mobile smart devices. Considering the capabilities of smart terminal devices, a 360° spherical level of detail (LoD) model for mobile street view services that renders panoramic images on the inner surface of a sphere via LoD is proposed in this article. Panoramic images are segmented into tiles and organized in a pyramid tile structure for LoD rendering to improve the rendering efficiency of the proposed model. A projection model between panoramic images and the spherical surface is presented to map the panoramic tiles on the spherical graticule. A street view-rendering algorithm of panoramic images is proposed with the rendering function of OpenGL for Embedded Systems (OpenGL ES). A street view service app running on Android, based on the proposed approach, is implemented to assess two aspects of the panoramic view model, namely visualization effect and efficiency. Experiment results reveal that the 360° spherical LoD model of the panoramic image can display 3D street view scenes better than the cubic panoramic view model. The proposed model also has an excellent 3D visualization effect and high-efficiency rendering ability for mobile street view services. Therefore, it is applicable in large-scale mobile street view services both online and offline and in augmented reality navigation. Numéro de notice : A2017-632 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/tgis.12247 En ligne : http://dx.doi.org/10.1111/tgis.12247 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=86950
in Transactions in GIS > vol 21 n° 5 (October 2017) . - pp 897 - 915[article]Privacy-preserving detection of anomalous phenomena in crowdsourced environmental sensing using fine-grained weighted voting / Mihai Maruseac in Geoinformatica, vol 21 n° 4 (October - December 2017)
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Titre : Privacy-preserving detection of anomalous phenomena in crowdsourced environmental sensing using fine-grained weighted voting Type de document : Article/Communication Auteurs : Mihai Maruseac, Auteur ; Gabriel Ghinita, Auteur ; Goce Trajcevski, Auteur ; Peter Scheuermann, Auteur Année de publication : 2017 Article en page(s) : pp 733 - 762 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web
[Termes IGN] modèle sémantique de données
[Termes IGN] production participative
[Termes IGN] protection civile
[Termes IGN] protection de la vie privée
[Termes IGN] source de donnéesRésumé : (Auteur) This article addresses the problem of preserving privacy of individuals who participate in collaborative environmental sensing. We observe that in many applications of societal importance, one is interested in constructing a map of the spatial distribution of a given phenomenon (e.g., temperature, CO2 concentration, water polluting agents, etc.) and mobile users can contribute with providing measurements data. However, contributing data may leak sensitive private details, as an adversary could infer the presence of a person in a certain location at a given time. This, in turn, may reveal information about other contexts (e.g., health, lifestyle choices), and may even impact an individual’s physical safety. We introduce a technique for privacy-preserving detection of anomalous phenomena, where the privacy of the individuals participating in collaborative environmental sensing is protected according to the powerful semantic model of differential privacy. We propose a differentially-private index structure to address the specific needs of anomalous phenomenon detection and derive privacy preserving query strategies that judiciously allocate the privacy budget to maintain high data accuracy. In addition, we construct an analytical model to characterize the sensed value inaccuracy introduced by the differentially-private noise injection, derive error bounds, and perform a statistical analysis that allows us to improve accuracy by using custom weights for measurements in each cell of the index structure. Extensive experimental results show that the proposed approach achieves high precision in identifying anomalies, and incurs low computational overhead. Numéro de notice : A2017-602 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1007/s10707-017-0304-3 En ligne : https://doi.org/10.1007/s10707-017-0304-3 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=86910
in Geoinformatica > vol 21 n° 4 (October - December 2017) . - pp 733 - 762[article]Approche exploratoire pour la conception de continuums cartographiques facilitant la navigation entre deux styles topographiques sur un géoportail / Jérémie Ory in Cartes & Géomatique, n° 233 (septembre - novembre 2017)
[article]
Titre : Approche exploratoire pour la conception de continuums cartographiques facilitant la navigation entre deux styles topographiques sur un géoportail Type de document : Article/Communication Auteurs : Jérémie Ory , Auteur ; Guillaume Touya , Auteur ; Charlotte Hoarau , Auteur ; Sidonie Christophe , Auteur Année de publication : 2017 Article en page(s) : pp 75 - 83 Note générale : Bibliographie Langues : Français (fre) Descripteur : [Vedettes matières IGN] Géomatique web
[Termes IGN] données vectorielles
[Termes IGN] géoportail
[Termes IGN] interpolation spatiale
[Termes IGN] légende cartographique
[Termes IGN] rédaction cartographique
[Termes IGN] représentation cartographique
[Termes IGN] style cartographiqueRésumé : (Auteur) Les portails cartographiques web permettent aux utilisateurs de visualiser un ensemble de représentation cartographique qui décrivent l'espace géographique de manière différente. Nous souhaitons permettre aux utilisateurs de naviguer facilement entre ces différentes représentations cartographiques grâce à des continuums cartographiques. Notre objectif est de concevoir un ensemble de représentations intermédiaires entre deux représentations cartographiques en s'appuyant sur des méthodes d'interpolation. Nous proposons une approche exploratoire en deux étapes : (1) nous proposons tout d'abord une méthode de comparaison permettant d'identifier quels éléments cartographiques doivent être interpolés et (2) nous proposons ensuite une méthode pour la conception de représentations intermédiaires. Numéro de notice : A2017-739 Affiliation des auteurs : LASTIG COGIT (2012-2019) Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueNat DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=88742
in Cartes & Géomatique > n° 233 (septembre - novembre 2017) . - pp 75 - 83[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 021-2017021 RAB Revue Centre de documentation En réserve L003 Disponible Documents numériques
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