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Titre : Rapport d'activités 2004 Type de document : Rapport Auteurs : Conseil national de l'information géographique, Auteur Editeur : Paris [France] : Centre national de l'information géographique CNIG Année de publication : 2005 Importance : 38 p. Format : 21 x 30 cm Langues : Français (fre) Descripteur : [Vedettes matières IGN] Infrastructure de données
[Termes IGN] Conseil national de l'information géographique
[Termes IGN] information géographique
[Termes IGN] infrastructure française des données localiséesNuméro de notice : 14228 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Rapport d'activité Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=40520 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 14228-01 RO.04 Livre Centre de documentation En réserve M-103 Disponible
Titre : Research on the construction of urban spatial data infrastructure Type de document : Article/Communication Auteurs : Xiaosheng Liu, Auteur ; Youliang Chen, Auteur ; Hexia Weng, Auteur Editeur : International Society for Photogrammetry and Remote Sensing ISPRS Année de publication : 2005 Collection : International Archives of Photogrammetry and Remote Sensing, ISSN 0252-8231 num. 36-4/W6 Conférence : ISPRS 2005, Workshop on Service and Application of Spatial Data Infrastructure 14/10/2005 16/10/2005 Hangzhou Chine OA Proceedings Importance : 4 p. ; pp 183 - 186 Format : 21 x 30 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Infrastructure de données
[Termes IGN] données localisées
[Termes IGN] infrastructure urbaine de données localisées
[Termes IGN] Kiangsi (Chine)
[Termes IGN] partage de données localisées
[Termes IGN] villeRésumé : (Auteur) This paper discusses the construction of urban spatial data infrastructure, taking Ganzhou for example. First, we set up an organization that manages and harmonizes spatial data, and design the total configuration of the USDI (urban spatial data infrastructure)of Ganzhou ; Second, we constitute the regulations of the producing and updating of spatial data, and probe in the technology of sharing data, and we also design the framework of data sharing in the USDI of Ganzhou, then we build up the framework dataset. Finally we discuss the integrating of GIS and OA. Numéro de notice : 13835 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Communication DOI : sans En ligne : https://www.isprs.org/proceedings/XXXVI/4-W6/papers/183-186XiaoshengLIU-A067.pdf Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=64277 Documents numériques
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Titre : Spatial data quality : from description to application Type de document : Thèse/HDR Auteurs : Pepijn Van Oort, Auteur Editeur : Delft : Netherlands Geodetic Commission NGC Année de publication : 2005 Collection : Netherlands Geodetic Commission Publications on Geodesy, ISSN 0165-1706 num. 60 Importance : 125 p. Format : 17 x 24 cm ISBN/ISSN/EAN : 978-90-6132-295-5 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Infrastructure de données
[Termes IGN] base de données d'occupation du sol
[Termes IGN] covariance
[Termes IGN] données localisées
[Termes IGN] erreur de classification
[Termes IGN] généalogie des données
[Termes IGN] incertitude des données
[Termes IGN] occupation du sol
[Termes IGN] précision de la classification
[Termes IGN] qualité des données
[Termes IGN] terminologie
[Termes IGN] varianceRésumé : (Auteur) The growing availability of spatial data along with growing ease to use the spatial data (thanks to wide-scale adoption of GIS) have made it possible to use spatial data in applications inappropriate considering the quality of the data. As a result, concerns about spatial data quality have increased. To deal with these concerns, it is necessary to (1) formalise and standardise descriptions of spatial data quality and (2) to apply these descriptions in assessing the suitability (fitness for use) of spatial data, before using the data. The aim of this thesis was twofold: (1) to enhance the description of spatial data quality and (2) to improve our understanding of the implications of spatial data quality.
Chapter 1 sets the scene with a discussion on uncertainty and an explanation of why concerns about spatial data quality exist. Knowledge gaps are identified and the chapter concludes with six research questions.
Chapter 2 presents an overview of definitions of spatial data quality. Overall, I found a strong agreement on which elements together define spatial data quality. Definitions appear to differ in two aspects: (1) the location within the meta-data report: some elements occur not in the spatial data quality section but in another section of the meta-data report-, and (2) the explicitness with which elements are recognised as individual elements. For example, the European pre-standard explicitly recognises the element 'homogeneity'. Other standards recognise the importance of documenting the variation in quality, without naming it explicitly as an individual element.
In chapter 3, we quantified the spatial variability in classification accuracy for the agricultural crops in the Dutch national land cover database (LGN). Classification accuracy was significantly correlated with: (1) the crop present according to LGN, (2) the homogeneity of the 8-cell neighbourhood around each cell, (3) the size of the patch in which a cell is located, and (4) the heterogeneity of the landscape in which a cell is located.
In chapter 4, I present methods that use error matrices and change detection error matrices as input to make more accurate land cover change estimates. It was shown that temporal correlation in classification errors has a significant impact and must be taken into account. Producers of lime series land cover data are recommended not only to report error matrices, but also change detection error matrices.
Chapter 5 focuses on positional accuracy and area estimates. From the positional accuracy of vertices delineating polygons, the variance and covariance in area can be derived. Earlier studies derived equations for the variance, this chapter presents a covariance equation. The variance and covariance equation were implemented in a model and applied in a case-study. The case-study consisted of 97 polygons with a small subsidy value (in euros per hectare) assigned to each polygon. With the model we could calculate the uncertainty in the total subsidy value (in euros) of the complete set of polygons as a consequence of uncertainty in the position of vertices.
Chapter 6 explores the relationship between completeness of spatial data and risk in digging activities around underground cables and pipelines. A model is presented for calculating the economic implications of over- and incompleteness. An important element of this model is the relationship between detection lime and costs. The model can be used to calculate the optimal detection time, i.e. the time at which expected costs are at their minimum.
Chapter 7 addresses the question why risk analysis (RA) is so rarely applied to assess the suitability of spatial data prior to using the data. In theory, the use of RA is beneficial because it allows the user to judge if the use of certain spatial data does not produce unacceptable risks. Frequently proposed hypotheses explaining the scarce adoption of RA are all technical and educational. In chapter 7 we propose a new group of hypotheses, based on decision theory. We found that the willingness to spend resources on RA depends (1) on the presence of feedback mechanisms in the decision-making process, (2) on how much is at stake and (3) to a minor extent on how well the decision-making process can be modelled.
Chapter 8 prescrits conclusions on the six research questions (chapters 2-7) and lists recommendations for users, producers and researchers of spatial data. With regard to the description, four recommendations are given. Firstly, spend more effort on documenting the lineage of reference data. Secondly, quantify and report correlation of quality between related data sets. Thirdly, investigate the integration of different forms of uncertainty (error, vagueness, ambiguity). Fourthly, study the implementation and use of spatial data quality standards. With regard to the application of spatial data quality descriptions, I have two main recommendations. Firstly, to continue the line of research followed in this thesis: quantification of implications of spatial data quality, through development of theory along with tangible illustrations in case-studies. Secondly, there is a need for more empirical research into how users cope with spatial data quality.Numéro de notice : 13261 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Thèse étrangère DOI : sans En ligne : https://www.ncgeo.nl/downloads/60Oort.pdf Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=54944 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13261-02 37.00 Livre Centre de documentation Géomatique Disponible 13261-01 37.00 Livre Centre de documentation Géomatique Disponible Assessing the worldwide developments of national spatial data clearinghouses / Joep Crompvoets in International journal of geographical information science IJGIS, vol 18 n° 7 (november 2004)
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Titre : Assessing the worldwide developments of national spatial data clearinghouses Type de document : Article/Communication Auteurs : Joep Crompvoets, Auteur ; Arnold K. Bregt, Auteur ; Abbas Rajabifard, Auteur ; Ian Williamson, Auteur Année de publication : 2004 Article en page(s) : pp 665 - 689 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Infrastructure de données
[Termes IGN] catalogue de données localisées
[Termes IGN] infrastructure mondiale des données localisées
[Termes IGN] INSPIRE
[Termes IGN] métadonnées
[Termes IGN] serveur de métadonnées
[Termes IGN] toile d'araignée mondialeRésumé : (Auteur) Many countries have spent considerable resources over the past few years debating optimal national spatial data infrastructures. One of the (main) elements of these infrastructures is the national spatial data clearinghouse, which facilitates access to required spatial data and provides complementary services. With this in mind, in April 2000, 2001, 2002 and December 2000, 2001, 2002, a web survey was carried out to assess systematically the developments of these national clearinghouses worldwide. Regarding the development in the number of implementations, it can be considered a worldwide success. However, of concern are the declining trends in use, management and content. One of the main reasons for these negative trends could be the dissatisfaction of the spatial data community with the functional capability of current clearinghouses. The functional capabilities of clearinghouses should likely be changed from a data-oriented to a user and application-oriented focus. This is in accord with the objectives of the second generation of spatial data infrastructures. The main factors, therefore, that will have positive impacts on developments in this field are the inclusion of web services, stability of funding and creation of user-friendly interfaces. Numéro de notice : A2004-396 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810410001702030 En ligne : https://doi.org/10.1080/13658810410001702030 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26923
in International journal of geographical information science IJGIS > vol 18 n° 7 (november 2004) . - pp 665 - 689[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 079-04071 RAB Revue Centre de documentation En réserve L003 Disponible 079-04072 RAB Revue Centre de documentation En réserve L003 Disponible Integrating land-cover data with different ontologies: identifying change from inconsistency / A. Comber in International journal of geographical information science IJGIS, vol 18 n° 7 (november 2004)
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Titre : Integrating land-cover data with different ontologies: identifying change from inconsistency Type de document : Article/Communication Auteurs : A. Comber, Auteur ; R. Wadsworth, Auteur ; Peter F. Fisher, Auteur Année de publication : 2004 Article en page(s) : pp 691 - 708 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Infrastructure de données
[Termes IGN] analyse comparative
[Termes IGN] carte d'occupation du sol
[Termes IGN] cohérence des données
[Termes IGN] détection de changement
[Termes IGN] intégration de données
[Termes IGN] jeu de données localisées
[Termes IGN] occupation du sol
[Termes IGN] ontologie
[Termes IGN] Royaume-Uni
[Termes IGN] série temporelleRésumé : (Auteur) Spatially coincident land-cover information frequently varies due to technological and political variations. This is especially problematic for timeseries analyses. We present an approach using expert expressions of how the semantics of different datasets relate to integrating temporal time series landcover information where the classification classes have fundamentally changed. We use land-cover mapping in the UK (LCMGB and LCM2000) as example data sets because of the extensive object-based meta-data in the LCM2000. Inconsistencies between the two datasets can arise from random, gross and systematic error and from an actual change in land cover. Locales of possible land-cover change are inferred by comparing characterizations derived from the semantic relations and meta-data. Field visits showed errors of omission to be 21% and errors of commission to be 28%, despite the accuracy limitations of the land-cover information when compared with the field survey component of the Countryside Survey 2000. Numéro de notice : A2004-397 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810410001705316 En ligne : https://doi.org/10.1080/13658810410001705316 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26924
in International journal of geographical information science IJGIS > vol 18 n° 7 (november 2004) . - pp 691 - 708[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 079-04071 RAB Revue Centre de documentation En réserve L003 Disponible 079-04072 RAB Revue Centre de documentation En réserve L003 Disponible Deegree, components and framework for creation of SDIS: new concepts in information systems / M. Muller in Geoinformatics, vol 7 n° 7 (01/10/2004)
PermalinkLes SDI se déclinent plutôt au futur [dixième conférence EC-GI&GIS, en juin 2004, à Varsovie] / Françoise de Blomac in SIG la lettre, n° 60 (octobre 2004)
PermalinkFrom onto-geonoesis to onto-genesis: The design of geographic ontologies / Eleni Tomai in Geoinformatica, vol 8 n° 3 (septembre - novembre 2004)
PermalinkPermalinkPermalinkA framework for geographic information in Great Britain / Keith J. Murray in Cartographic journal (the), vol 41 n° 2 (August 2004)
PermalinkCataloguing geo-resources by metadata: the conquest of meta-information / U. Voges in Geoinformatics, vol 7 n° 4 (01/06/2004)
PermalinkEtude des caractéristiques projectives des objets spatiaux et de leurs relations / Roland Billen in Revue internationale de géomatique, vol 14 n° 2 (juin - aout 2004)
PermalinkOntologies et métadonnées pour le partage d'information géographique / Julien Barde in Revue internationale de géomatique, vol 14 n° 2 (juin - aout 2004)
PermalinkLe projet Towntology : un retour d'expérience pour la construction d'une ontologie urbaine / Catherine Roussey in Revue internationale de géomatique, vol 14 n° 2 (juin - aout 2004)
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