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Exploration of information: theoretic arguments for the limited amount of information in a map / J. Bjorke in Cartography and Geographic Information Science, vol 39 n° 2 (April 2012)
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Titre : Exploration of information: theoretic arguments for the limited amount of information in a map Type de document : Article/Communication Auteurs : J. Bjorke, Auteur Année de publication : 2012 Article en page(s) : pp 88 - 97 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Cartographie
[Termes IGN] cartographie par internet
[Termes IGN] conception cartographique
[Termes IGN] exploration de données
[Termes IGN] lisibilité perceptive
[Termes IGN] qualité des données
[Termes IGN] variable visuelle
[Termes IGN] visibilité
[Termes IGN] visualisation cartographiqueRésumé : (Auteur) From the application of information theory capacity limits of maps are derived and some cartographic rules are formulated—based on theoretical models and perception studies. The perception study shows that for a relief map with coloured height intervals the channel capacity, as defined in information theory, is reached at seven~~eight height classes. Generally, the length of a visual variable may be characterized by the channel capacity of the map. This theoretical study shows how increased attention should be paid to perceptual separation as the number of categories increases. The requirement becomes more and more crucial as the number of categories exceeds five. The principle of group visibility is formulated and demonstrated. Group visibility considers the visibility of groups of map features and may be utilized in a visual search for geographical patterns. The quantitative measures presented offers computational methods to control group visibility for example in an interactive visualization system. Numéro de notice : A2012-453 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1559/1523040639288 En ligne : https://doi.org/10.1559/1523040639288 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31899
in Cartography and Geographic Information Science > vol 39 n° 2 (April 2012) . - pp 88 - 97[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 032-2012021 RAB Revue Centre de documentation En réserve L003 Disponible Regional and local SDIs in Europe: theory and pratice / Ian Masser in Geoinformatics, vol 15 n° 3 (01/04/2012)
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Titre : Regional and local SDIs in Europe: theory and pratice Type de document : Article/Communication Auteurs : Ian Masser, Auteur Année de publication : 2012 Article en page(s) : pp 28 - 31 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Infrastructure de données
[Termes IGN] infrastructure européenne de données localisées
[Termes IGN] infrastructure nationale des données localisées
[Termes IGN] infrastructure régionale de données localisées
[Termes IGN] infrastructure urbaine de données localiséesRésumé : (Editeur) This article considers the findings of some recent projects in Europe that highlight the importance of regional and local spatial data infrastructures. The discussion is divided into three main sections. The first of these sets out a theoretical framework for the evaluation of regional and local SDIs based on the notion of multi level governance. The second reviews the findings of three recent European initiatives that have considered some of the experiences of regional and local SDIs in Europe while the third and final section considers the implications of these findings for future SDI development. Numéro de notice : A2012-165 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31612
in Geoinformatics > vol 15 n° 3 (01/04/2012) . - pp 28 - 31[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 262-2012031 SL Revue Centre de documentation Revues en salle Disponible Supporting accessibility for blind and vision-impaired people with a localized gazetteer and open source geotechnology / M. Rice in Transactions in GIS, vol 16 n° 2 (April 2012)
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Titre : Supporting accessibility for blind and vision-impaired people with a localized gazetteer and open source geotechnology Type de document : Article/Communication Auteurs : M. Rice, Auteur ; A. Aburizaiza, Auteur ; R. Daniel Jacobson, Auteur ; et al., Auteur Année de publication : 2012 Article en page(s) : pp 177 - 190 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web
[Termes IGN] accessibilité
[Termes IGN] données localisées des bénévoles
[Termes IGN] intégration de données
[Termes IGN] logiciel libre
[Termes IGN] navigation pédestre
[Termes IGN] personne malvoyante
[Termes IGN] PostGIS
[Termes IGN] PostgreSQL
[Termes IGN] répertoire toponymiqueRésumé : (Auteur) Disabled people, especially the blind and vision-impaired, are challenged by many transitory hazards in urban environments such as construction barricades, temporary fencing across walkways, and obstacles along curbs. These hazards present a problem for navigation, because they typically appear in an unplanned manner and are seldom included in databases used for accessibility mapping. Tactile maps are a traditional tool used by blind and vision-impaired people for navigation through urban environments, but such maps are not automatically updated with transitory hazards. As an alternative approach to static content on tactile maps, we use volunteered geographic information (VGI) and an Open Source system to provide updates of local infrastructure. These VGI updates, contributed via voice, text message, and e-mail, use geographic descriptions containing place names to describe changes to the local environment. After they have been contributed and stored in a database, we georeference VGI updates with a detailed gazetteer of local place names including buildings, administrative offices, landmarks, roadways, and dormitories. We publish maps and alerts showing transitory hazards, including location-based alerts delivered to mobile devices. Our system is built with several technologies including PHP, JavaScript, AJAX, Google Maps API, PostgreSQL, an Open Source database, and PostGIS, the PostgreSQL's spatial extension. This article provides insight into the integration of user-contributed geospatial information into a comprehensive system for use by the blind and vision-impaired, focusing on currently developed methods for geoparsing and georeferencing using a gazetteer. Numéro de notice : A2012-159 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/SOCIETE NUMERIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/j.1467-9671.2012.01318.x Date de publication en ligne : 13/04/2012 En ligne : https://doi.org/10.1111/j.1467-9671.2012.01318.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31606
in Transactions in GIS > vol 16 n° 2 (April 2012) . - pp 177 - 190[article]The WISERD geoportal: A tool for the discovery, analysis and visualization of socio-economic (Meta-) data for Wales / R. Fry in Transactions in GIS, vol 16 n° 2 (April 2012)
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Titre : The WISERD geoportal: A tool for the discovery, analysis and visualization of socio-economic (Meta-) data for Wales Type de document : Article/Communication Auteurs : R. Fry, Auteur ; R. Berry, Auteur ; G. Higgs, Auteur ; et al., Auteur Année de publication : 2012 Article en page(s) : pp 105 - 124 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web
[Termes IGN] données socio-économiques
[Termes IGN] géoportail
[Termes IGN] GeoServer
[Termes IGN] logiciel libre
[Termes IGN] métadonnées
[Termes IGN] OpenLayers
[Termes IGN] Pays de Galles
[Termes IGN] PostGIS
[Termes IGN] PostgreSQLRésumé : (Auteur) The Wales Institute of Socio-Economic Research, Data and Methods (WISERD) is an interdisciplinary, cross-institutional academic research group based in Wales, UK. One of the key objectives of WISERD is to develop a spatial framework that enhances a researcher's ability to discover socio-economic research data relating to Wales with the aim of encouraging collaborative research and re-use of existing data. This article describes the development of an online geoportal designed to meet this objective. Using free and open-source software (FOSS) components and services, a range of software tools has been developed to capture standards-compliant metadata for a variety of data sources. The geoportal is unique in that, in our review of over 120 geoportals worldwide, we have not previously encountered a geoportal dedicated to supporting quantitative and qualitative social science academic and policy research. A particularly innovative aspect of the geoportal has involved the building of a rich meta-database of government surveys, geo-referenced semantically-tagged qualitative data (generated from primary research), ‘grey’ data (e.g. from transcripts, journal publications, books, PhD theses) and Government administrative data. This article describes the challenges faced during the development of the WISERD Geoportal which can be accessed via http://www.wiserd.ac.uk/geoportal/. Numéro de notice : A2012-155 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/j.1467-9671.2012.01308.x Date de publication en ligne : 13/04/2012 En ligne : https://doi.org/10.1111/j.1467-9671.2012.01308.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31602
in Transactions in GIS > vol 16 n° 2 (April 2012) . - pp 105 - 124[article]Transaction rules for updating surfaces in 3D GIS / G. Groger in ISPRS Journal of photogrammetry and remote sensing, vol 69 (April 2012)
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Titre : Transaction rules for updating surfaces in 3D GIS Type de document : Article/Communication Auteurs : G. Groger, Auteur ; L. Plumer, Auteur Année de publication : 2012 Article en page(s) : pp 134 - 145 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique
[Termes IGN] cohérence des données
[Termes IGN] contrainte d'intégrité
[Termes IGN] données localisées 3D
[Termes IGN] modèle numérique de surface
[Termes IGN] programmation par contraintes
[Termes IGN] règle
[Termes IGN] SIG 3DRésumé : (Auteur) Three-dimensional surface models representing the terrain and the outer hull of objects such as buildings and bridges support important 3D GIS applications, for example telecommunication planning and noise emission simulation. Updates of surface models often introduce errors which violate basic assumptions of users and their applications. The notion of geometric-topological consistency covers many of these assumptions. It guarantees that objects do not penetrate mutually or that objects completely cover other objects. Assuring that updates do not violate geometric-topological consistency constitutes a major challenge for 3D GIS which has not been satisfactorily met so far. This article presents a solution which is based on efficient transaction rules for updating 3D surface models. We show that these rules are safe (consistency is preserved by any rule application) and complete (any consistent surface model can be generated by successive rule applications). For both properties rigorous mathematic proofs are given. Numéro de notice : A2012-197 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2012.03.004 En ligne : https://doi.org/10.1016/j.isprsjprs.2012.03.004 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31644
in ISPRS Journal of photogrammetry and remote sensing > vol 69 (April 2012) . - pp 134 - 145[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 081-2012031 SL Revue Centre de documentation Revues en salle Disponible VGI as big data: a new but delicate geographic data-source / F. Fischer in Geoinformatics, vol 15 n° 3 (01/04/2012)
PermalinkWeb geoservices and ancient cadastral maps: The web C.A.R.T.E. project / M. Brovelli in Transactions in GIS, vol 16 n° 2 (April 2012)
PermalinkGeoportal.DE: ein Blick in die Geodateninfrastuktur Deutschland / S. Schmitz in ZFV, Zeitschrift für Geodäsie, Geoinformation und Landmanagement, vol 137 n° 2 (01/03/2012)
PermalinkINSPIRE et Open Data : convergences et divergences / Henri Pornon in Géomatique expert, n° 85 (01/03/2012)
PermalinkRelative radiometric correction of multi-temporal ALOS AVNIR-2 data for the estimation of forest attributes / Q. Xu in ISPRS Journal of photogrammetry and remote sensing, vol 68 (March 2012)
PermalinkRoad network extraction in suburban areas / A. Grote in Photogrammetric record, vol 27 n° 137 (March - May 2012)
PermalinkVers une gouvernance de l'information géographique / Mathieu Becker in Géomatique expert, n° 85 (01/03/2012)
PermalinkPermalinkSemistatic Animation - Integrating Past, Present and Future in Map Animations / A. Nossum in Cartographic journal (the), vol 49 n° 1 (February 2012)
PermalinkTowards a common understanding in cartographic design / A. Hopstock in GEO: Geoconnexion international, vol 11 n° 2 (february 2012)
PermalinkPermalinkAutomatic geospatial metadata generation for earth science virtual data products / P. Yue in Geoinformatica, vol 16 n° 1 (January 2012)
PermalinkComprehensive GNSS solutions for international customers / M. Wang in GIM international, vol 26 n° 1 (January 2012)
PermalinkPermalinkPermalinkPermalinkFormalisation, acquisition et mise en œuvre de connaissances pour l’intégration virtuelle de bases de données géographiques / Nathalie Abadie (2012)
PermalinkIl se passe toujours quelque chose à l'IGN ! / Françoise de Blomac in SIG la lettre, n° 133 (janvier 2012)
PermalinkPermalinkUne journée géomatique très inspirée en Nord-Pas-de-Calais / Françoise de Blomac in SIG la lettre, n° 133 (janvier 2012)
PermalinkPermalinkMise en place d'un processus d'intégration de données géosciences externes et leur publication / Alice Bourdet (2012)
PermalinkModèle d'estimation de l'imprécision des mesures géométriques de données géographiques / Jean-François Girres (2012)
PermalinkModélisation urbaine : de la représentation au projet. Interopérabilité et intégration des données et modèles urbains : standards, normes et tendances pour les SIG / Emmanuel Devys (2012)
PermalinkMonroe county takes to the road with GIS technology vehicle / K. Corbey in GEO: Geoconnexion international, vol 11 n° 1 (january 2012)
PermalinkParticipation à l'évolution du SIG de la Communauté d'Agglomération "Les Portes de l'Essonne" / Jonathan Lao (2012)
PermalinkProvably correct and complete transaction rules for updating 3D city models / G. Groger in Geoinformatica, vol 16 n° 1 (January 2012)
PermalinkPermalinkRapport d'activité 2011 de l'Institut National de l'Information Géographique et Forestière IGN / Institut national de l'information géographique et forestière (2012 -) (2012)
PermalinkRéalisation d'une base de données naturaliste spatiale des études écologiques de l'EPAMSA / Constance De Villeneuve (2012)
PermalinkPermalinkThe SB-index and the HSB-index: efficient indices for spatial data warehouses / Thiago Luís Lopes Siqueira in Geoinformatica, vol 16 n° 1 (January 2012)
PermalinkPermalinkAn assessment of internal neural network parameters affecting image classification accuracy / L. Zhou in Photogrammetric Engineering & Remote Sensing, PERS, vol 77 n° 12 (December 2011)
PermalinkUne approche globale pour le développement de l'environnement construit : Clôture du PNR54 "environnement construit" / E. Brühwiler in Géomatique suisse, vol 109 n° 12 (01/12/2011)
PermalinkData fusion of extremely high resolution aerial imagery and LiDAR data for automated railroad centre line reconstruction / R. Beger in ISPRS Journal of photogrammetry and remote sensing, vol 66 n° 6 supplement (December 2011)
PermalinkGeoprofessionals should look outside their own box / D. Haarsma in GIM international, vol 25 n° 12 (December 2011)
PermalinkPermalinkOpen data : comment éviter la grande pagaille / Françoise de Blomac in SIG la lettre, n° 132 (décembre 2011)
PermalinkLa photogrammétrie, un marché qui mérite d'être approfondi / Anne Fantuzzi in Géomètre, n° 2087 (décembre 2011)
PermalinkHigh-precision GNSS receivers / N. Blanco-Delgado in GIM international, vol 25 n° 11 (November 2011)
PermalinkIntégration de la temporalité dans les données de référence : cas du système d'information du territoire genevois / Patricia Bordin in Géomatique expert, n° 83 (01/11/2011)
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