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Understanding governance dynamics: The governing system of spatial data infrastructures / Jaap-Willem Sjoukema in International Journal of Spatial Data Infrastructures Research, vol 15 (Year 2020)  

Public [article]  inInternational Journal of Spatial Data Infrastructures Research > vol 15 (Year 2020) Titre : Understanding governance dynamics: The governing system of spatial data infrastructures Type de document : Article/Communication Auteurs : Jaap-Willem Sjoukema, Auteur ; Arnold K. Bregt, Auteur ; Joep Crompvoets, Auteur Année de publication : 2020 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Infrastructure de données [Termes IGN] cadre conceptuel [Termes IGN] complexité [Termes IGN] diffusion de données [Termes IGN] infrastructure nationale des données localisées [Termes IGN] partage de données localisées [Termes IGN] Pays-Bas Résumé : (auteur) The importance and influence of spatial data has risen in all kinds of governmental and non-governmental processes, giving spatial data infrastructures (SDIs) a key role in spatial data sharing and dissemination. SDIs are nowadays challenged by new technologies and user demands. Proper SDI governance seems essential, but it is unclear to what extent current SDI governing systems are fully equipped to deal with the dynamics and complexity of SDIs. This research proposes a governing system framework for analysing the governing system of SDIs, adapted from the concepts of Kooiman. This framework is applied to two Dutch SDI cases: the Risk Map and the New Map of the Netherlands. With the help of the framework, the strong and weak aspects of the governing system of SDIs become more apparent and insights emerge on which interactions, images, instruments, actions and structures enable or constrain SDI governance. By observing changes in governing systems over time, SDI governance dynamics become visible. The governing system framework brings a new perspective to SDIs and SDI theory and is a potentially useful analytical tool for SDI governors. Numéro de notice : A2020-847 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.2902/1725-0463.2020.15.art1 En ligne : https://doi.org/10.2902/1725-0463.2020.15.art1 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=98652 [article]

To charge or not to charge [spatial data] / Pepijn Van Oort in GIM international, vol 24 n° 8 (August 2010)

Public [article]  inGIM international > vol 24 n° 8 (August 2010) . - pp 13 - 14 Titre : To charge or not to charge [spatial data] Type de document : Article/Communication Auteurs : Pepijn Van Oort, Auteur ; Arnold K. Bregt, Auteur Année de publication : 2010 Article en page(s) : pp 13 - 14 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Infrastructure de données [Termes IGN] accès aux données localisées [Termes IGN] coût [Termes IGN] données localisées libres [Termes IGN] marché de l'information géographique [Termes IGN] tarif Résumé : (Auteur) Should users pay for geo-data produced by government and institutions? This question has fostered a long and heated debate, often spiced by contributions fully in favour or fully opposed to free access. Based on an extensive review of the literature, and a knowledging that there is no-one-size-fits-all solution, the authors developed a framework for selecting proper funding models. Free access is the predominant model, but in some cases charging is both viable and justifiable. Numéro de notice : A2010-313 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30507 [article]

Spatial data infrastructures as complex adaptative systems / Lucasz Grus in International journal of geographical information science IJGIS, vol 24 n°3-4 (march 2010)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 24 n°3-4 (march 2010) . - pp 439 - 463 Titre : Spatial data infrastructures as complex adaptative systems Type de document : Article/Communication Auteurs : Lucasz Grus, Auteur ; Joep Crompvoets, Auteur ; Arnold K. Bregt, Auteur Année de publication : 2010 Article en page(s) : pp 439 - 463 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Infrastructure de données [Termes IGN] estimation statistique [Termes IGN] infrastructure nationale des données localisées [Termes IGN] intégration de données [Termes IGN] qualité des données [Termes IGN] système complexe Résumé : (Auteur) Many researchers throughout the world have been struggling to better understand and describe spatial data infrastructures (SDIs). Our knowledge of the real forces and mechanisms behind SDIs is still very limited. The reason for this difficulty might lie in the complex, dynamic and multifaceted nature of SDIs. To evaluate the functioning and effects of SDIs we must have a proper theory and understanding of their nature. This article describes a new approach to understanding SDIs by looking at them through the lens of complex adaptive systems (CASs). CASs are frequently described by the following features and behaviours: complexity, components, self-organization, openness, unpredictability, nonlinearity and adaptability, scale-independence, existence of feedback loop mechanism and sensitivity to initial conditions. In this article both CAS and SDI features are presented, examined and compared using three National SDI case studies from the Netherlands, Australia and Poland. These three National SDIs were carefully analysed to identify CAS features and behaviours. In addition, an Internet survey of SDI experts was carried out to gauge the degree to which they consider SDIs and CASs to be similar. This explorative study provides evidence that to a certain extent SDIs can be viewed as CASs because they have many features in common and behave in a similar way. Studying SDIs as CASs has significant implications for our understanding of SDIs. It will help us to identify and better understand the key factors and conditions for SDI functioning. Assuming that SDIs behave much like CASs, this also has implications for their assessment: assessment techniques typical for linear and predictable systems may not be valid for complex and adaptive systems. This implies that future studies on the development of an SDI assessment framework must consider the complex and adaptive nature of SDIs. Copyright Taylor & Francis Numéro de notice : A2010-144 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810802687319 En ligne : http://dx.doi.org/10.1080/13658810802687319 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30339 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
079-2010022	RAB	Revue	Centre de documentation	En réserve L003	Disponible
079-2010021	RAB	Revue	Centre de documentation	En réserve L003	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)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 18 n° 7 (november 2004) . - pp 665 - 689 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 mondiale Résumé : (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 [article]

Exemplaires(2)

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

Spatial variability in classification accuracy of agricultural crops in the Dutch national land-cover database / A.J.W. Van Oort in International journal of geographical information science IJGIS, vol 18 n° 6 (october 2004)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 18 n° 6 (october 2004) . - pp 611 - 626 Titre : Spatial variability in classification accuracy of agricultural crops in the Dutch national land-cover database Type de document : Article/Communication Auteurs : A.J.W. Van Oort, Auteur ; Arnold K. Bregt, Auteur ; et al., Auteur Année de publication : 2004 Article en page(s) : pp 611 - 626 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Cartographie numérique [Termes IGN] base de données d'occupation du sol [Termes IGN] base de données localisées [Termes IGN] classe d'objets [Termes IGN] cultures [Termes IGN] données maillées [Termes IGN] occupation du sol [Termes IGN] Pays-Bas [Termes IGN] paysage [Termes IGN] pixel [Termes IGN] précision de la classification Résumé : (Auteur) Variability in per cell classification accuracy is predominantly modelled with landcover class as the explanatory variable, i.e. with users' accuracies from the error matrix. Logistic regression models were developed to include other explanatory variables: heterogeneity in the 3 x 3 window around a cell, the size of the patch and the complexity of the landscape in which a cell is located. It was found that per cell, the probability of correct classification was significantly (a = 0.05) higher for cells with a less heterogeneous neighbourhood, for cells part of larger patches and for cells in regions with a less heterogeneous landscape. To validate the models, a leave-one-out procedure was applied in which the absolute difference between the actual and the model-estimated number of cells correctly classified was summarized over 55 regions in the Netherlands. The sum of differences reduced from 60.9 to 48.1 after adding the variables 'patch size' and 'landscape dominance' to the land-cover class model. Spatial variability thus modelled therefore led to a substantial improvement in the estimation of the per cell classification accuracy. Numéro de notice : A2004-353 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810410001701969 En ligne : https://doi.org/10.1080/13658810410001701969 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26880 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
079-04061	RAB	Revue	Centre de documentation	En réserve L003	Disponible
079-04062	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Assessing fitness for use: the expected value of spatial data sets / S. De Bruin in International journal of geographical information science IJGIS, vol 15 n° 5 (july 2001)  

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