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Cognitively plausible representations for the alignment of sketch and geo-referenced maps / Sahib Jan in Journal of Spatial Information Science, JoSIS, n° 14 (March 2017)  

Public [article]  inJournal of Spatial Information Science, JoSIS > n° 14 (March 2017) . - pp 31 - 59 Titre : Cognitively plausible representations for the alignment of sketch and geo-referenced maps Type de document : Article/Communication Auteurs : Sahib Jan, Auteur ; Angela Schwering, Auteur ; Carl Schultz, Auteur ; Malumbo Chaka Chipofya, Auteur Année de publication : 2017 Article en page(s) : pp 31 - 59 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] croquis topographique [Termes IGN] représentation cartographique 2D [Termes IGN] réseau de contraintes [Vedettes matières IGN] Cartologie Résumé : (Auteur) In many geo-spatial applications, freehand sketch maps are considered as an intuitive way to collect user-generated spatial information. The task of automatically mapping information from such hand-drawn sketch maps to geo-referenced maps is known as the alignment task. Researchers have proposed various qualitative representations to capture distorted and generalized spatial information in sketch maps. However, thus far the effectiveness of these representations has not been evaluated in the context of an alignment task. This paper empirically evaluates a set of cognitively plausible representations for alignment using real sketch maps collected from two different study areas with the corresponding geo-referenced maps. Firstly, the representations are evaluated in a single-aspect alignment approach by demonstrating the alignment of maps for each individual sketch aspect. Secondly, representations are evaluated across multiple sketch aspects using more than one representation in the alignment task. The evaluations demonstrated the suitability of the chosen representation for aligning user-generated content with geo-referenced maps in a real-world scenario. Numéro de notice : A2017-818 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.5311/JOSIS.2017.14.294 En ligne : https://doi.org/10.5311/JOSIS.2017.14.294 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=89303 [article]

Modeling and manipulating spacetime objects in a true 4D model / Ken Arroyo Ohori in Journal of Spatial Information Science, JoSIS, n° 14 (March 2017)  

Public [article]  inJournal of Spatial Information Science, JoSIS > n° 14 (March 2017) . - pp 61 - 93 Titre : Modeling and manipulating spacetime objects in a true 4D model Type de document : Article/Communication Auteurs : Ken Arroyo Ohori, Auteur ; Hugo Ledoux, Auteur ; Jantien E. Stoter, Auteur Année de publication : 2017 Article en page(s) : pp 61 - 93 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées [Termes IGN] données spatiotemporelles [Termes IGN] données vectorielles [Termes IGN] espace-temps [Termes IGN] modélisation 4D [Termes IGN] objet géographique [Termes IGN] relation topologique Résumé : (Auteur) The concept of spacetime has long been used in physics to refer to models that integrate 3D space and time as a single 4D continuum. We argue in this paper, that it is also advantageous to use this concept in a practical geographic context by realizing a true 4D model, where time is modeled and implemented as a dimension in the same manner as the three spatial dimensions. Within this paper, we focus on 4D vector objects, which can be implemented using dimension-independent data structures such as generalized maps. A 4D vector model allows us to create and manipulate models with actual 4D objects and the topological relationships connecting them, all of which have a geometric interpretation and can be constructed, modified, and queried. In this paper, we discuss where such a 4D model fits with respect to other spatiotemporal modeling approaches, and we show concretely how higher-dimensional modeling can be used to represent such 4D objects and topological relationships. In addition, we explain how the 4D objects in such a system can be created and manipulated using a small set of implementable operations, which use simple 3D space and 1D time inputs for intuitiveness and which modify the underlying 4D model indirectly. Numéro de notice : A2017-819 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.5311/JOSIS.2017.14.297 En ligne : https://doi.org/10.5311/JOSIS.2017.14.297 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=89304 [article]