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Synchronising geometric representations for map mashups using relative positioning and Linked Data / Weiming Huang in International journal of geographical information science IJGIS, vol 32 n° 5-6 (May - June 2018)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 32 n° 5-6 (May - June 2018) . - pp 1117 - 1137 Titre : Synchronising geometric representations for map mashups using relative positioning and Linked Data Type de document : Article/Communication Auteurs : Weiming Huang, Auteur ; Ali Mansourian, Auteur ; Ehsan Abdolmajidi, Auteur ; Haiqi Xu, Auteur ; Lars Harrie, Auteur Année de publication : 2018 Article en page(s) : pp 1117 - 1137 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web [Termes IGN] application composite [Termes IGN] géovisualisation [Termes IGN] modèle conceptuel de données localisées [Termes IGN] positionnement différentiel [Termes IGN] représentation multiple [Termes IGN] SPARQL [Termes IGN] synchronisation [Termes IGN] web des données Résumé : (Auteur) Map mashups, as a common way of presenting geospatial information on the Web, are generally created by spatially overlaying thematic information on top of various base maps. This simple overlay approach often raises geometric deficiencies due to geometric uncertainties in the data. This issue is particularly apparent in a multi-scale context because the thematic data seldom have synchronised level of detail with the base map. In this study, we propose, develop, implement and evaluate a relative positioning approach based on shared geometries and relative coordinates to synchronise geometric representations for map mashups through several scales. To realise the relative positioning between datasets, we adopt a Linked Data–based technical framework in which the data are organised according to ontologies that are designed based on the GeoSPARQL vocabulary. A prototype system is developed to demonstrate the feasibility and usability of the relative positioning approach. The results show that the approach synchronises and integrates the geometries of thematic data and the base map effectively, and the thematic data are automatically tailored for multi-scale visualisation. The proposed framework can be used as a new way of modelling geospatial data on the Web, with merits in terms of both data visualisation and querying. Numéro de notice : A2018-201 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/13658816.2018.1441416 Date de publication en ligne : 01/03/2018 En ligne : https://doi.org/10.1080/13658816.2018.1441416 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=89870 [article]

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Matching authority and VGI road networks using an extended node-based matching algorithm / Ehsan Abdolmajidi in Geo-spatial Information Science, vol 18 n° 2 (August 2015)  

Public [article]  inGeo-spatial Information Science > vol 18 n° 2 (August 2015) . - pp 65 - 80 Titre : Matching authority and VGI road networks using an extended node-based matching algorithm Type de document : Article/Communication Auteurs : Ehsan Abdolmajidi, Auteur ; Ali Mansourian, Auteur ; Julian Will, Auteur ; Lars Harrie, Auteur Année de publication : 2015 Article en page(s) : pp 65 - 80 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Infrastructure de données [Termes IGN] appariement topologique [Termes IGN] base de données routières [Termes IGN] données localisées de référence [Termes IGN] données localisées des bénévoles [Termes IGN] OpenStreetMap [Termes IGN] qualité des données [Termes IGN] relation topologique [Termes IGN] réseau routier [Termes IGN] Suède Résumé : (auteur) The amount of volunteered geographic information (VGI) has increased over the past decade, and several studies have been conducted to evaluate the quality of VGI data. In this study, we evaluate the completeness of the road network in the VGI data set OpenStreetMap (OSM). The evaluation is based on an accurate and efficient network-matching algorithm. The study begins with a comparison of the two main strategies for network matching: segment-based and node-based matching. The comparison shows that the result quality is comparable for the two strategies, but the node-based result is considerably more computationally efficient. Therefore, we improve the accuracy of node-based algorithm by handling topological relationships and detecting patterns of complicated network components. Finally, we conduct a case study on the extended node-based algorithm in which we match OSM to the Swedish National Road Database (NVDB) in Scania, Sweden. The case study reveals that OSM has a completeness of 87% in the urban areas and 69% in the rural areas of Scania. The accuracy of the matching process is approximately 95%. The conclusion is that the extended node-based algorithm is sufficiently accurate and efficient for conducting surveys of the quality of OSM and other VGI road data sets in large geographic regions. Numéro de notice : A2015-760 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1080/10095020.2015.1071065 En ligne : http://dx.doi.org/10.1080/10095020.2015.1071065 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=78796 [article]

Application of mobile GIS and SDI for emergency management / A. Mobaraki in Revue Française de Photogrammétrie et de Télédétection, n° 185 (Mars 2007)  

Public [article]  inRevue Française de Photogrammétrie et de Télédétection > n° 185 (Mars 2007) . - pp 95 - 100 Titre : Application of mobile GIS and SDI for emergency management Type de document : Article/Communication Auteurs : A. Mobaraki, Auteur ; Ali Mansourian, Auteur ; M. Malek, Auteur ; H. Mohammadi, Auteur Année de publication : 2007 Conférence : ISPRS 2006, Commission 1 Symposium, From sensors to imagery 03/07/2006 06/07/2006 Champs-sur-Marne [Paris Marne-la-Vallée] France OA ISPRS Archives Article en page(s) : pp 95 - 100 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG [Termes IGN] gestion de crise [Termes IGN] infrastructure nationale des données localisées [Termes IGN] Iran [Termes IGN] modèle conceptuel de données localisées [Termes IGN] partage de données localisées [Termes IGN] SIG nomade [Termes IGN] Web Feature Service Résumé : (Auteur) Emergency management requires precise and reliable information about the current situation of emergency, existing sources and facilities, while more than 80% of this information has spatial component or location. Considering the urgent and time sensitive nature of emergency situations, it is necessary to collect and use spatial information of the current state of the emergency within the minimum waste of time. This will be achieved if in the context of a collaborative effort, each of the parties involved in emergency management, takes responsibilities for collecting some parts of spatial information required for emergency management and sharing them to be accessible for wider emergency management community. In this regard, Spatial Data Infrastructure (SDI) is an appropriate framework to facilitate such collaboration in spatial data collection and sharing. Mansourian (2005) showed the improvement of emergency management by developing an SDI conceptual model and web-based GIS to facilitate spatial information management. Based on SDI framework for emergency management, field data collection and real time updating of Emergency Operation Center (EOC) on current emergency situation can be highly improved using Mobile GIS. Mobile GIS can also improve in-filed decision-making for emergency workers. Meanwhile, in order to use mobile GIS for emergency management, it is necessary to expand the developed SDI conceptual model to support Mobile GIS applications. This paper aims to address the role of Mobile GIS and SDI as an integrated framework for facilitating emergency management by improving field data collection and in-field decision-making. This is based on a research project which is ongoing in Iran. Numéro de notice : A2007-404 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : sans En ligne : https://www.isprs.org/proceedings/XXXVI/part1/Papers/PS3-50.pdf Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28767 [article]

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