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US census multiple representations data set project / National center for geographic information & analysis (Etats-Unis) (1990) 

Public Titre : US census multiple representations data set project : technical report on pilot project Type de document : Rapport Auteurs : National center for geographic information & analysis (Etats-Unis), Auteur Editeur : Santa Barbara - Californie [Etats-Unis] : National Center for Geographic Information and Analysis NCGIA Année de publication : 1990 Collection : NCGIA technical paper series num. 90-4 Importance : 42 p. Format : 22 x 28 cm Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Infrastructure de données [Termes IGN] données multiéchelles [Termes IGN] Floride (Etats-Unis) [Termes IGN] format de données [Termes IGN] représentation multiple [Termes IGN] Topologically Integrated Geographic Encoding and Referencing [Termes IGN] transmission de données Numéro de notice : 62116 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Rapport d'étude technique Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=64824

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Spatial theory for the integration of resolution-limited data / Beat P. Bruegger (1986)  

Public Titre : Spatial theory for the integration of resolution-limited data Type de document : Thèse/HDR Auteurs : Beat P. Bruegger, Auteur Editeur : Santa Barbara - Californie [Etats-Unis] : National Center for Geographic Information and Analysis NCGIA Année de publication : 1986 Autre Editeur : Maine [Etats-Unis] : University of Maine Collection : NCGIA technical paper series num. 96-8 Importance : 189 p. Format : 21 x 30 cm Note générale : Bibliographie A thesis submitted in partial fulfillement of the requirements for the Degree of Doctor of Philosophy in Surveying Engineering Langues : Français (fre) Descripteur : [Vedettes matières IGN] Géomatique [Termes IGN] données localisées [Termes IGN] incertitude des données [Termes IGN] information géographique [Termes IGN] métadonnées géographiques [Termes IGN] modèle conceptuel de données localisées [Termes IGN] primitive [Termes IGN] primitive géométrique [Termes IGN] représentation des détails topographiques [Termes IGN] représentation des données Index. décimale : THESE Thèses et HDR Résumé : (auteur) The objective of this thesis is the design of a spatial theory for GIS (consisting of representation, meta data, and transformations) that allows complete integration of data sets that differ in resolution and format. The scope is limited to a discrete view of geographic reality similar to "area-class maps", "categorical coverages", and "nominal fields". The spatial theory consists of representations of resolution-limited spatial knowledge, meta data that describe the knowledge content of representations, and transformations between representations of different type, resolution, format (raster or vector). The spatial theory addresses the following problems: (1) What limitations does limited resolution impose on spatial knowledge that is represented in GIS? (2) How can such resolution-limited knowledge be represented in a way that keeps precise track of the contained spatial knowledge and its limitations? (3) How can the same spatial knowledge be represented in different formats such as raster and vector? (4) How can spatial knowledge be transformed to other representation types, levels of resolution, and formats? The viability of the proposed spatial theory is shown by demonstrating the implement ability of representations and transformations. The practical applicability of the proposed resolution concept is shown by relating it to the resolution of sensors and by showing that resolution-limited representations can always be visualized within the limitations of display media. Note de contenu : 1. Introduction 1.1. Objective 1.2. Problem 1.3. Approach 1.4. Continuous and Discrete Models 1.5. Scope 1.6. Outline 2. Previous and Related Work 2.1. Data Integration 2.2. Components of Spatial Theory 2.3. Spatial Modeling 3. Overview of Approach and Spatial Theory 3.1. Modeling in the Infinite 3.2. Components of Spatial Representations 3.3. Overview of Representations 3.4. Reduction of Knowledge Content 3.5. Approach to Consistent Spatial Theory 3.6. Approach to Format Integration 3.7. Preserving the Relation between Geometry and Attibute 4. Representation of Resolution-Limited knowledge 4.1. Model of Geographic Reality 4.2. Resolution-Limited Space 4.3. Resolution-Limited Mixture Fields 4.4. Resolution-Limited Feature Partitions 4.5. Some Quantitative Properties of Mixture Fields and Feature Partitions 5. Representation of Uncertain Spatial Knowledge 5.1. Uncertain Mixture Fields 5.2. Uncertain Feature Partitions 5.3. Uncertain Stand-Alone Features 6. Finite Representation of Spatial Knowledge 6.1. Finite Representation of Uncertain Mixture Fiels 6.2. Finite Representation of Uncertain Feature Partitions and Stand-Alone Features 7. Visualization of Resolution-Limited Knowledge 7.1. Visualization of Mixture Fiels 7.2. Visualization of Feature Partitions 7.3. Visualization of Stand-Alone Features 8. Meta Data and Transformations between Resolution-Limited Representations 8.1. Meta Data 8.2. Primitive Transformations within a Representation Type 8.3. Primitive Transformations across Representation Type 8.4. Primitive Transformations across Finite Format 8.5. General Transformations as Combinations of Primitive ones 9. Data Integration in a Consistent Spatial Theory 9.1.Resolution-Sensitive Suitability Studies 9.2. Silver-Free Overlay 9.3. Format-Independent User Interfaces 10. Conclusionc 10.1. Major Results 10.2. Future Work Numéro de notice : 19355 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Thèse étrangère Note de thèse : PhD thesis : Surveying Engineering : University of Maine : 1986 Organisme de stage : Geography Department of the University of Oklahoma En ligne : http://escholarship.org/uc/item/5mg192rf Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=82021