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A co-citation and cluster analysis of scientometrics of geographic information ontology / Yu Liu in ISPRS International journal of geo-information, vol 7 n° 3 (March 2018)  

Public [article]  inISPRS International journal of geo-information > vol 7 n° 3 (March 2018) Titre : A co-citation and cluster analysis of scientometrics of geographic information ontology Type de document : Article/Communication Auteurs : Yu Liu, Auteur ; Lin Li, Auteur ; Hang Shen, Auteur ; Hui Yang, Auteur ; Feng Luo, Auteur Année de publication : 2018 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique [Termes IGN] données localisées [Termes IGN] ontologie [Termes IGN] publication [Termes IGN] recherche scientifique Résumé : (Bibliographie) Geographic information ontology represents an effective means of expressing geographic concepts and relationships between them. As an emerging field of study, it has drawn the attention of increasing numbers of scholars worldwide. In this study, both co-citation and cluster analysis methods of scientometrics are used to perform a comprehensive analysis of the papers on the topic of geographic information ontology indexed by the Web of Science (WoS) and published between 2001 and 2016. The results show that the history of the study of geographic information ontology can be divided roughly into three periods. Computer science and mathematics play important roles in this field of study. The International Journal of Geographical Information Science is an important periodical that provides knowledge resources for the study of geographic information ontology. The papers of Gruber TR and Guarino N are referenced most frequently, as well as that of Smith B., who formally introduced information ontology to the field of geographic information science. Providing personalized and intelligent geographic information services for users is an important focus of geographic information ontology. Numéro de notice : A2018-104 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.3390/ijgi7030120 En ligne : https://doi.org/10.3390/ijgi7030120 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=89519 [article]

A two-level topological model for 3D features in CityGML / Lin Li in Computers, Environment and Urban Systems, vol 59 (September 2016)  

Public [article]  inComputers, Environment and Urban Systems > vol 59 (September 2016) . - pp 11- 24 Titre : A two-level topological model for 3D features in CityGML Type de document : Article/Communication Auteurs : Lin Li, Auteur ; Feng Luo, Auteur ; Haihong Zhu, Auteur ; Shen Ying, Auteur ; Zhigang Zhao, Auteur Année de publication : 2016 Article en page(s) : pp 11- 24 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG [Termes IGN] CityGML [Termes IGN] contrainte de cohérence [Termes IGN] intégrité topologique [Termes IGN] modèle 3D de l'espace urbain [Termes IGN] modèle topologique de données [Termes IGN] niveau de détail [Termes IGN] objet géographique 3D [Termes IGN] primitive géométrique [Termes IGN] relation topologique [Termes IGN] relation topologique 3D [Termes IGN] SIG 3D Résumé : (auteur) CityGML, as the standard for the representation and exchange of 3D city models, contains rich information in terms of geometry, semantics, topology and appearance. With respect to topology, CityGML adopts the XLink approach to represent topological relationships between different geometric aggregates or thematic features; however, it is limited to shared objects. This paper proposes a two-level model for representing 3D topological relationships in CityGML: high-level (semantic-level) topology between semantic features and low-level (geometric-level) topology between geometric primitives. Five topological relationships are adopted in this model: touch, in, equal, overlap and disjoint. The semantic-level topology is derived from the geometric-level topology on the basis of the shared geometric primitives. To maintain the 3D topology, topological consistency rules are presented. An Application Domain Extension, called TopoADE, is proposed for the implementation of the topological model. The TopoADE consists of three modules: Topology, Feature and Geometry. Finally, 3D city models with LoD1 to LoD4 are used to test this model. Experimentation on those data sets indicates a validation of the proposed topological model in CityGML. Numéro de notice : A2016-405 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.compenvurbsys.2016.04.007 Date de publication en ligne : 12/05/2016 En ligne : http://dx.doi.org/10.1016/j.compenvurbsys.2016.04.007 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=81228 [article]

Semantic volume texture for virtual city building model visualisation / Lin Li in Computers, Environment and Urban Systems, vol 54 (November 2015)  

Public [article]  inComputers, Environment and Urban Systems > vol 54 (November 2015) Titre : Semantic volume texture for virtual city building model visualisation Type de document : Article/Communication Auteurs : Lin Li, Auteur ; XinQiao Duan, Auteur ; et al., Auteur Année de publication : 2015 Langues : Anglais (eng) Descripteur : [Termes IGN] cadastre 3D [Termes IGN] CityGML [Termes IGN] géovisualisation [Termes IGN] modèle de simulation [Termes IGN] rendu réaliste [Termes IGN] visualisation 3D [Vedettes matières IGN] Géovisualisation Résumé : (auteur) With the rapid urbanisation and development of three-dimensional (3D) space use, space objects in residential houses are of increasing concern. Illustrating these spatial entities within a clustered and multi-layered environment is confronted with the long-standing cognitive challenges of visual occlusion, visual clutter and visual navigation. Direct illustration as cross sections and cutaways provide valuable instruction for removing occlusion while preserving global contexts to give positioning cues. However, cross-sectioning or cutting away of the popular boundary-described models suffers from computational robustness and efficiency problems, while separated boundary geometry with surface properties prevents the efficient image-based direct illustrations from implementing a visually complete, semantically consistent practice easily. This article proposes a semantic volume texture (SVT) model for direct illustration. This true-3D raster model integrates spatial pattern embedding as well, thus avoiding the costly amendments to keep semantic consistent and visually complete during illustrative cutting and reconstructing operations. The proposed model is extended to the practical base of CityGML schema, the preparation of SVT is presented and applications imitating cross sections and cutaways are demonstrated. Experiments show that SVT-based direct illustrations are effective and efficient, making the proposed model suitable for explorative visualisations in the layered micro-scale environments. Numéro de notice : A2015--005 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.compenvurbsys.2015.07.003 En ligne : http://dx.doi.org/10.1016/j.compenvurbsys.2015.07.003 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=80458 [article]

Construction of 3D volumetric objects for a 3D cadastral system / Shen Ying in Transactions in GIS, vol 19 n° 5 (October 2015)  

Public [article]  inTransactions in GIS > vol 19 n° 5 (October 2015) . - pp 758 – 779 Titre : Construction of 3D volumetric objects for a 3D cadastral system Type de document : Article/Communication Auteurs : Shen Ying, Auteur ; Renzhong Guo, Auteur ; Lin Li, Auteur ; et al., Auteur Année de publication : 2015 Article en page(s) : pp 758 – 779 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG [Termes IGN] adjacence [Termes IGN] cadastre [Termes IGN] cadastre 3D [Termes IGN] modélisation 3D [Termes IGN] parcelle cadastrale [Termes IGN] reconstruction 3D [Termes IGN] topologie Résumé : (auteur) This article presents a new method to illustrate the feasibility of 3D topology creation. We base the 3D construction process on testing real cases of implementation of 3D parcels construction in a 3D cadastral system. With the utilization and development of dense urban space, true 3D geometric volume primitives are needed to represent 3D parcels with the adjacency and incidence relationship. We present an effective straightforward approach to identifying and constructing the valid volumetric cadastral object from the given faces, and build the topological relationships among 3D cadastral objects on-the-fly, based on input consisting of loose boundary 3D faces made by surveyors. This is drastically different from most existing methods, which focus on the validation of single volumetric objects after the assumption of the object's creation. Existing methods do not support the needed types of geometry/topology (e.g. non 2-manifold, singularities) and how to create and maintain valid 3D parcels is still a challenge in practice. We will show that the method does not change the faces themselves and faces in a given input are independently specified. Various volumetric objects, including non-manifold 3D cadastral objects (legal spaces), can be constructed correctly by this method, as will be shown from the results. Numéro de notice : A2015-686 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/tgis.12129 En ligne : http://dx.doi.org/10.1111/tgis.12129 Format de la ressource électronique : Url article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=78332 [article]