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A comparative study of existing multi-scale maps: what content at which scale? / Marion Dumont (2016)
Titre : A comparative study of existing multi-scale maps: what content at which scale? Type de document : Article/Communication Auteurs : Marion Dumont , Auteur ; Guillaume Touya , Auteur ; Cécile Duchêne , Auteur Editeur : Berkeley [Californie - Etats-Unis] : University of California Année de publication : 2016 Projets : MapMuxing / Christophe, Sidonie Conférence : GIScience 2016, Short Papers, 9th international conference on geographic information science 27/09/2016 30/09/2016 Montréal Québec - Canada OA Proceedings Importance : pp 88 - 91 Format : 21 x 30 cm Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] analyse comparative
[Termes IGN] carte topographique
[Termes IGN] mise à l'échelle
[Termes IGN] niveau d'abstraction
[Termes IGN] zoom
[Vedettes matières IGN] GénéralisationRésumé : (auteur) This paper presents a comparative study of existing topographic multi-scale maps, regarding relations between display scale and level of abstraction (LoA) of the map content. The general trends in zoom levels distribution across scale and the original patterns in transitions between LoAs are especially highlighted. Numéro de notice : C2016-044 Affiliation des auteurs : LASTIG COGIT (2012-2019) Thématique : GEOMATIQUE Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : 10.21433/B3112993d46 En ligne : https://doi.org/10.21433/B3112993d46 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=91888 Documents numériques
en open access
A comparative study of existing multi-scale maps - pdf éditeurAdobe Acrobat PDF A local approach to optimize the scale parameter in multiresolution segmentation for multispectral imagery / F. Cánovas-García in Geocarto international, vol 30 n° 7 - 8 (August - September 2015)
[article]
Titre : A local approach to optimize the scale parameter in multiresolution segmentation for multispectral imagery Type de document : Article/Communication Auteurs : F. Cánovas-García, Auteur ; Francisco Alonso‐Sarría, Auteur Année de publication : 2015 Article en page(s) : pp 937 - 961 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] analyse d'image orientée objet
[Termes IGN] facteur d'échelle
[Termes IGN] image multibande
[Termes IGN] mise à l'échelle
[Termes IGN] segmentation d'image
[Termes IGN] segmentation multi-échelleRésumé : (Auteur) The results obtained using the object-based image analysis approach for remote sensing image analysis depend strongly on the quality of the segmentation step. In this paper, to optimize the scale parameter in a multiresolution segmentation, we analyse a high-resolution image of a large and heterogeneous agricultural area. This approach is based on using a set of agricultural plots extracted from official maps as uniform spatial units. The scale parameter is then optimized in each uniform spatial unit. Intra-object and inter-object heterogeneity measurements are used to evaluate each segmentation. To avoid subsegmentation, some oversegmentation is allowed, but is attenuated in a second step using the spectral difference segmentation algorithm. The statistical distribution of the scale parameter is not equal in all land uses, indicating the soundness of this local approach. A quantitative assessment of the results was also conducted for the different land covers. The results indicate that the spectral contrast between objects is larger with the local approach than with the global approach. These differences were statistically significant in all land uses except irrigated fruit trees and greenhouses. In the absence of subsegmentation, this suggests that the objects will be placed far apart in the space of variables, even if they are very close in the physical space. This is an obvious advantage in a subsequent classification of the objects. Numéro de notice : A2015-505 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/10106049.2015.1004131 Date de publication en ligne : 18/02/2015 En ligne : http://www.tandfonline.com/doi/full/10.1080/10106049.2015.1004131 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=77422
in Geocarto international > vol 30 n° 7 - 8 (August - September 2015) . - pp 937 - 961[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 059-2015041 RAB Revue Centre de documentation En réserve L003 Disponible Scalable multi-platform distribution of spatial 3D contents / Jan Klimke in International journal of 3-D information modeling, vol 3 n° 3 (July- September 2014)
[article]
Titre : Scalable multi-platform distribution of spatial 3D contents Type de document : Article/Communication Auteurs : Jan Klimke, Auteur ; Benjamin Hagedorn, Auteur ; Jürgen Döllner, Auteur Année de publication : 2014 Article en page(s) : pp 35 - 49 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques
[Termes IGN] dalle
[Termes IGN] données localisées 3D
[Termes IGN] mise à l'échelle
[Termes IGN] modèle 3D de l'espace urbain
[Termes IGN] moteur de réalité virtuelle
[Termes IGN] PlaGe (plateforme de généralisation)
[Termes IGN] rendu réaliste
[Termes IGN] téléphonie mobile
[Termes IGN] visualisation 3DRésumé : (auteur) Virtual 3D city models provide powerful user interfaces for communication of 2D and 3D geoinformation. Providing high quality visualization of massive 3D geoinformation in a scalable, fast, and cost efficient manner is still a challenging task. Especially for mobile and web-based system environments, software and hardware configurations of target systems differ significantly. This makes it hard to provide fast, visually appealing renderings of 3D data throughout a variety of platforms and devices. Current mobile or web-based solutions for 3D visualization usually require raw 3D scene data such as triangle meshes together with textures delivered from server to client, what makes them strongly limited in terms of size and complexity of the models they can handle.
This paper introduces a new approach for provisioning of massive, virtual 3D city models on different platforms namely web browsers, smartphones or tablets, by means of an interactive map assembled from artificial oblique image tiles. The key concept is to synthesize such images of a virtual 3D city model by a 3D rendering service in a preprocessing step. This service encapsulates model handling and 3D rendering techniques for high quality visualization of massive 3D models. By generating image tiles using this service, the 3D rendering process is shifted from the client side, which provides major advantages: (a) The complexity of the 3D city model data is decoupled from data transfer complexity (b) the implementation of client applications is simplified significantly as 3D rendering is encapsulated on server side (c) 3D city models can be easily deployed for and used by a large number of concurrent users, leading to a high degree of scalability of the overall approach. All core 3D rendering techniques are performed on a dedicated 3D rendering server, and thin-client applications can be compactly implemented for various devices and platforms.Numéro de notice : A2014-693 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/IMAGERIE Nature : Article DOI : 10.4018/ij3dim.2014070103 En ligne : https://doi.org/10.4018/ij3dim.2014070103 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=75329
in International journal of 3-D information modeling > vol 3 n° 3 (July- September 2014) . - pp 35 - 49[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 138-2014031 RAB Revue Centre de documentation En réserve L003 Disponible Fast construction of global pyramids for very large satellite images / Longgang Xiang in Transactions in GIS, vol 17 n° 2 (April 2013)
[article]
Titre : Fast construction of global pyramids for very large satellite images Type de document : Article/Communication Auteurs : Longgang Xiang, Auteur ; Jing Chen, Auteur ; Jianya Gong, Auteur ; Zhen Zeng, Auteur Année de publication : 2013 Article en page(s) : pp 282 - 297 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] données multiéchelles
[Termes IGN] globe virtuel
[Termes IGN] image satellite
[Termes IGN] mise à l'échelleRésumé : (Auteur) Satellite imagery plays a critical role in recent popular Virtual Globe systems since it delivers spatially-related information in a direct and intuitive way. A satellite image may be very large in size due to large coverage, high resolution, or both, and therefore the construction of global pyramids, a core data structure of Virtual Globe, will be time-consuming if designed improperly. This article, based on the idea of divide-and-conquer, proposes an efficient algorithm, termed CGP, for the Construction of Global Pyramids, which builds global pyramids with only a single sequential scan of input imagery. By analyzing the space complexity of CGP, the memory-minimum pyramid level is derived, at which the memory requirement of CGP is minimized to a practical level, even for very large satellite images. This article also discusses a parallel implementation of CGP, which parallelizes the two main actions in CGP, thus further improving the pyramid construction performance. Both theoretical analysis and experimental results show that our approach outperforms other methods and, more importantly, this advantage increases considerably as the size of input imagery increases. Numéro de notice : A2013-175 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/tgis.12001 Date de publication en ligne : 05/10/2012 En ligne : https://doi.org/10.1111/tgis.12001 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32313
in Transactions in GIS > vol 17 n° 2 (April 2013) . - pp 282 - 297[article]vol 15 n° 1 - janvier - février 2010 - Multidimensionalité et passage à l'échelle (Bulletin de Ingénierie des systèmes d'information, ISI : Revue des sciences et technologies de l'information, RSTI) / Bruno Defude
[n° ou bulletin]
est un bulletin de Ingénierie des systèmes d'information, ISI : Revue des sciences et technologies de l'information, RSTI (2001 -)
Titre : vol 15 n° 1 - janvier - février 2010 - Multidimensionalité et passage à l'échelle Type de document : Périodique Auteurs : Bruno Defude, Éditeur scientifique Année de publication : 2010 Importance : 145 p. Langues : Français (fre) Descripteur : [Vedettes matières IGN] Systèmes d'information
[Termes IGN] base de données temporelles
[Termes IGN] données multidimensionnelles
[Termes IGN] ingénierie
[Termes IGN] mise à jour de base de données
[Termes IGN] mise à l'échelle
[Termes IGN] OLAP
[Termes IGN] panne
[Termes IGN] système d'informationNuméro de notice : 093-201001 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE/SOCIETE NUMERIQUE Nature : Numéro de périodique En ligne : https://isi.revuesonline.com/resnum.jsp?editionId=1295&Submit2.x=11&Submit2.y=6 Format de la ressource électronique : URL sommaire Permalink : https://documentation.ensg.eu/index.php?lvl=bulletin_display&id=10229 [n° ou bulletin]ContientExemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 093-2010011 SL Revue Centre de documentation Revues en salle Disponible Developing collaborative classifiers using an Expert-based Model / Giorgos Mountrakis in Photogrammetric Engineering & Remote Sensing, PERS, vol 75 n° 7 (July 2009)PermalinkShape deformation in continuous map generalization / J. Danciger in Geoinformatica, vol 13 n° 2 (June 2009)PermalinkUsing cover measurements to estimate aboveground understorey biomass in Maritime pine stands / Annabel J. Porté in Annals of Forest Science, Vol 66 n° 3 (April - May 2009)PermalinkAn automated method of scale selection and sheet configuration for multiple sheet census maps with Insets / W.G. Thompson in Cartography and Geographic Information Science, vol 36 n° 1 (January 2009)PermalinkSupporting the process of exploring and interpreting space-time multivariate patterns: the visual inquiry toolkit / J. Chen in Cartography and Geographic Information Science, vol 35 n° 1 (January 2008)PermalinkEGC'07, 7èmes journées francophones Extraction et gestion des connaissances, 23 - 26 janvier 2007, Namur, Belgique / Jérôme Euzenat (2007)PermalinkScaling net primary production to a MODIS footprint in support of Earth observing system product validation / D. Turner in International Journal of Remote Sensing IJRS, vol 25 n° 10 (May 2004)PermalinkThe scale matcher: a procedure for assessing scale compatibility of spatial data and models / L.R. Lilburne in International journal of geographical information science IJGIS, vol 18 n° 3 (april - may 2004)PermalinkEfficient flow computation on massive grid terrain datasets / L. Arge in Geoinformatica, vol 7 n° 4 (December 2003)PermalinkCoordinate conversion in a GIS environment: case-study of user-defined coordinate conversion for regional detroit / Y. Arisoy in GIM international, vol 15 n° 10 (October 2001)Permalink