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Routes visualization: Automated placement of multiple route symbols along a physical network infrastructure / Jules Teulade-Denantes in Journal of Spatial Information Science, JoSIS, n° 11 (September 2015)    

Public [article]  inJournal of Spatial Information Science, JoSIS > n° 11 (September 2015) . - 53--79 Titre : Routes visualization: Automated placement of multiple route symbols along a physical network infrastructure Type de document : Article/Communication Auteurs : Jules Teulade-Denantes, Auteur ; Adrien Maudet , Auteur ; Cécile Duchêne , Auteur Année de publication : 2015 Article en page(s) : 53--79 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] algorithme du recuit simulé [Termes IGN] carte routière [Termes IGN] optimisation (mathématiques) [Termes IGN] placement automatique des signes conventionnels [Termes IGN] programmation par contraintes [Termes IGN] réseau routier [Termes IGN] sentier [Vedettes matières IGN] Généralisation Mots-clés libres : automated cartography  route maps  symbol placement  constraint formulation  constraint optimization problem  simulated annealing Résumé : (auteur) This paper tackles the representation of routes carried by a physical network infrastructure on a map. In particular, the paper examines the case where each route is represented by a separate colored linear symbol offset from the physical network segments and from other routes—as on public transit maps with bus routes offset from roads. In this study, the objective is to automate the placement of such route symbols while maximizing their legibility, especially at junctions. The problem is modeled as a constraint optimization problem. Legibility criteria are identified and formalized as constraints to optimize, while focusing on the case of hiking routes in a physical network composed of roads and pedestrian paths. Two solving methods are tested, based on backtracking and simulated annealing meta-heuristics respectively. Encouraging results obtained on real data are presented and discussed. Numéro de notice : A2015--057 Affiliation des auteurs : LASTIG COGIT (2012-2019) Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.5311/JOSIS.2015.11.230 Date de publication en ligne : 17/09/2015 En ligne : http://dx.doi.org/10.5311/JOSIS.2015.11.230 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=83281 [article]

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Invariant spatial information in sketch maps — a study of survey sketch maps of urban areas / Jia Wang in Journal of Spatial Information Science, JoSIS, n° 11 (September 2015)  

Public [article]  inJournal of Spatial Information Science, JoSIS > n° 11 (September 2015) Titre : Invariant spatial information in sketch maps — a study of survey sketch maps of urban areas Type de document : Article/Communication Auteurs : Jia Wang, Auteur ; Angela Schwering, Auteur Année de publication : 2015 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] cognition [Termes IGN] croquis topographique [Termes IGN] invariant [Termes IGN] objet géographique [Termes IGN] zone urbaine [Vedettes matières IGN] Géovisualisation Résumé : (auteur) It is commonly recognized that free-hand sketch maps are influenced by cognitive impacts and therefore sketch maps are in complete, distorted, and schematized. This makes it difficult to achieve a one-to-one alignment between a sketch map and its corresponding geo-referenced metric map. Nevertheless, sketch maps are still useful to communicate spatial knowledge, indicating that sketch maps contain certain spatial information that is robust to cognitive impacts. In existing studies, sketch maps are used frequently to measure cognitive maps. However, little work has been done on invariant spatial information in sketch maps, which is the information of spatial configurations representing correctly the real world. We aim to study such information from a cognitive perspective. This paper first presents basic spatial objects identified in sketch maps and then introduces sketch aspects that capture invariant spatial information. The accuracy and reliability of these aspects were evaluated by a human study. We collected sketch maps from participants, extracted and measured spatial relations of identified spatial objects, and in the end analyzed the accuracy and statistical significance of these relations. Based on the statistical survey, we propose in this paper a set of seven sketch aspects that constitute invariant spatial information, along with a spatial analysis method to measure them. The findings of these aspects help to understand which spatial information is preserved under the transformation from the physical world to human sketch maps. Numéro de notice : A2015--079 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.5311/JOSIS.2015.11.225 En ligne : http://dx.doi.org/10.5311/JOSIS.2015.11.225 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=83770 [article]