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Integrating indoor and outdoor spaces for pedestrian navigation guidance: A review / Ann Vanclooster in Transactions in GIS, vol 20 n° 4 (August 2016)  

Public [article]  inTransactions in GIS > vol 20 n° 4 (August 2016) . - pp 491 - 525 Titre : Integrating indoor and outdoor spaces for pedestrian navigation guidance: A review Type de document : Article/Communication Auteurs : Ann Vanclooster, Auteur ; Nico Van De Weghe, Auteur ; Philippe De Maeyer, Auteur Année de publication : 2016 Article en page(s) : pp 491 - 525 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement [Termes IGN] état de l'art [Termes IGN] intégration [Termes IGN] navigation pédestre [Termes IGN] piéton [Termes IGN] positionnement en intérieur [Termes IGN] système de navigation Résumé : (auteur) In light of the many improvements within 3D urban modeling and Location-Based Services, this article provides a timely review of the state-of-the-art on integrating indoor and outdoor spaces in pedestrian navigation guidance aids. With people moving seamlessly between buildings and surrounding areas, navigation guidance tools should extend from merely outdoor or indoor guidance, to provide support in the combined indoor-outdoor context. This article first examines the challenges and complexities of integrating indoor and outdoor spaces into a single navigation system. Next, by using objective selection criteria, 36 relevant studies were withheld and further reviewed on their specific developments in data model requirements, and algorithmic and context support for integrated IO navigation systems. This review shows that the challenges of dealing with both indoor and outdoor space structures, while taking into account pedestrian's freer use of space, currently complicate the proposition of a unified IO space concept for navigation. However, there are some ongoing developments (e.g. context definitions, algorithmic extensions, increased data availability, growing awareness of pedestrians’ perception during wayfinding) that will help to bring outdoor and indoor spaces closer together in the realm of combined geospatial analysis. Numéro de notice : A2016-992 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/tgis.12178 En ligne : http://dx.doi.org/10.1111/tgis.12178 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=83766 [article]

Automatic conversion of IFC datasets to geometrically and semantically correct CityGML LOD3 buildings / Sjors Donkers in Transactions in GIS, vol 20 n° 4 (August 2016)  

Public [article]  inTransactions in GIS > vol 20 n° 4 (August 2016) . - pp 547 - 569 Titre : Automatic conversion of IFC datasets to geometrically and semantically correct CityGML LOD3 buildings Type de document : Article/Communication Auteurs : Sjors Donkers, Auteur ; Hugo Ledoux, Auteur ; Junqiao Zhao, Auteur ; Jantien E. Stoter, Auteur Année de publication : 2016 Article en page(s) : pp 547 - 569 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG [Termes IGN] généralisation sémantique [Termes IGN] niveau de détail [Termes IGN] système d'information géographique Résumé : (auteur) Although the international standard CityGML has five levels of detail (LODs), the vast majority of available models are the coarse ones (up to LOD2, i.e. block-shaped buildings with roofs). LOD3 and LOD4 models, which contain architectural details such as balconies, windows and rooms, rarely exist because, unlike coarser LODs, their construction requires several datasets that must be acquired with different technologies, and often extensive manual work is needed. In this article we investigate an alternative to obtaining CityGML LOD3 models: the automatic conversion from already existing architectural models (stored in the IFC format). Existing conversion algorithms mostly focus on the semantic mappings and convert all the geometries, which yields CityGML models having poor usability in practice (spatial analysis, for instance, is not possible). We present a conversion algorithm that accurately applies the correct semantics from IFC models and that constructs valid CityGML LOD3 buildings by performing a series of geometric operations in 3D. We have implemented our algorithm and we demonstrate its effectiveness with several real-world datasets. We also propose specific improvements to both standards to foster their integration in the future. Numéro de notice : A2016-993 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/tgis.12162 En ligne : http://dx.doi.org/10.1111/tgis.12162 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=83768 [article]

An immune genetic algorithm to buildings displacement in cartographic generalization / Yageng Sun in Transactions in GIS, vol 20 n° 4 (August 2016)  

Public [article]  inTransactions in GIS > vol 20 n° 4 (August 2016) . - pp 585 - 612 Titre : An immune genetic algorithm to buildings displacement in cartographic generalization Type de document : Article/Communication Auteurs : Yageng Sun, Auteur ; Qingsheng Guo, Auteur ; Yuangang Liu, Auteur ; et al., Auteur Année de publication : 2016 Article en page(s) : pp 585 - 612 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] algorithme génétique [Termes IGN] bâtiment [Termes IGN] contrainte géométrique [Termes IGN] contrainte relationnelle [Termes IGN] déplacement d'objet géographique [Termes IGN] généralisation automatique de données [Termes IGN] généralisation cartographique [Vedettes matières IGN] Généralisation Résumé : (auteur) Spatial conflicts may occur when map data are displayed at a scale smaller than that of the source map. This study applies the displacement operator in cartographic generalization to resolve such spatial conflicts and to improve the clarity and legibility of map. The immune genetic algorithm (IGA) is used in this study for buildings displacement to solve conflicts. IGA is based on the genetic algorithm (GA) and employs the self-adjusting mechanism of antibody concentration to enhance population diversity. Meanwhile, the elitism retention strategy is adopted in IGA to guarantee that the best individual (antibody) is not lost and destroyed in the next generation to strengthen convergence efficiency. The compared experiment between IGA and GA shows that the displacement result produced by IGA performs better than GA. Finally, in order to make the displaced map more attractive to cartographers, two constraints – the building alignment constraint and building tangent relation constraint – are applied in IGA to restrict the buildings’ displacement. The same experimental data are adopted to prove that the improved IGA is useful for maintaining the two constraints. Numéro de notice : A2016--053 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/tgis.12165 En ligne : http://dx.doi.org/10.1111/tgis.12165 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=83771 [article]

A spatial data infrastructure approach for the characterization of New Zealand's groundwater systems / Alexander Kmoch in Transactions in GIS, vol 20 n° 4 (August 2016)  

Public [article]  inTransactions in GIS > vol 20 n° 4 (August 2016) . - pp 626 - 641 Titre : A spatial data infrastructure approach for the characterization of New Zealand's groundwater systems Type de document : Article/Communication Auteurs : Alexander Kmoch, Auteur ; Hermann Klug, Auteur ; Alistair B. H. Ritchie, Auteur ; et al., Auteur Année de publication : 2016 Article en page(s) : pp 626 - 641 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale [Termes IGN] données environnementales [Termes IGN] eau souterraine [Termes IGN] infrastructure nationale des données localisées [Termes IGN] Nouvelle-Zélande [Termes IGN] Open geospatial consortium [Termes IGN] service web [Termes IGN] système d'information géographique Résumé : (auteur) The future information needs of stakeholders for hydrogeological and hydro-climate data management and assessment in New Zealand may be met with an Open Geospatial Consortium (OGC) standards-compliant publicly accessible web services framework which aims to provide integrated use of groundwater information and environmental observation data in general. The stages of the framework development described in this article are search and discovery as well as data collection and access with (meta)data services, which are developed in a community process. The concept and prototype implementation of OGC-compliant web services for groundwater and hydro-climate data include demonstration data services that present multiple distributed datasets of environmental observations. The results also iterate over the stakeholder community process and the refined profile of OGC services for environmental observation data sharing within the New Zealand Spatial Data Infrastructure (SDI) landscape, including datasets from the National Groundwater Monitoring Program and the New Zealand Climate Database along with datasets from affiliated regional councils at regional- and sub-regional scales. With the definition of the New Zealand observation data profile we show that current state-of-the-art standards do not necessarily need to be improved, but that the community has to agree upon how to use these standards in an iterative process. Numéro de notice : A2016-995 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/tgis.12171 En ligne : http://dx.doi.org/10.1111/tgis.12171 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=83773 [article]