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Titre : Journal of Spatial Information Science (JoSIS) Type de document : Périodique Auteurs : Matt Duckham, Directeur de publication Editeur : Maine [Etats-Unis] : University of Maine Année de publication : 2010 - ISBN/ISSN/EAN : 1948-660X Langues : Anglais (eng) Résumé : Titre en accès libre, avec comité de lecture, dédié aux articles de recherche dans le domaine de l'information géographique
JOSIS is indexed in Scopus, DOAJ, DBLP, and Web of Science.Numéro de notice : 000 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Titre de périodique nature-HAL : ArtAvecCL-RevueIntern En ligne : http://josis.xyz/index.php/josis Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=78497
Titre : Elements of GPS precise point positioning Type de document : Thèse/HDR Auteurs : Boonsap Witchayangkoon, Auteur ; Alfred Leick, Directeur de thèse Editeur : Maine [Etats-Unis] : University of Maine Année de publication : 2000 Importance : 286 p. Note générale : bibliographie
A thesis submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy (in Spatial Information Science and Engineering)Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement
[Termes IGN] éphémérides de satellite
[Termes IGN] filtre de Kalman
[Termes IGN] géodésie spatiale
[Termes IGN] Global Orbitography Navigation Satellite System
[Termes IGN] Global Positioning System
[Termes IGN] horloge
[Termes IGN] International Terrestrial Reference Frame
[Termes IGN] marée océanique
[Termes IGN] orbite
[Termes IGN] positionnement ponctuel précis
[Termes IGN] propagation ionosphérique
[Termes IGN] propagation troposphérique
[Termes IGN] récepteur bifréquence
[Termes IGN] récepteur monofréquence
[Termes IGN] surcharge atmosphérique
[Termes IGN] surcharge océanique
[Termes IGN] tectonique des plaquesRésumé : (auteur) The International GPS Service (IGS) now regularly makes accurate GPS ephemeris and satellite clock information available over the Internet. The satellite coordinates are given in the International Terrestrial Reference Frame (ITRF). This thesis investigates Precise Point Positioning (PPP) using dual and single frequency pseudorange and carrier phase observations. Both the static and kinematic modes are investigated. The static PPP solution examples use six-hour data sets from four stations. The observations were made while Selective Availability (SA) was active and after it had been discontinued. The static solutions agree to within 10 cm with published coordinates or with solutions obtained from the Jet Propulsion Laboratory (JPL) PPP Internet service. The kinematic solutions show a discrepancy of less than one meter, mostly around half a meter. For observations with low multipath, the research shows that single-frequency ionosphere-free PPP solutions are equivalent to the dual-frequency solutions. In case of single-frequency observations the pseudorange dominates the solution. Using a priori tropospheric information does not seem to improve dual-frequency PPP solutions as compared to the case when the vertical tropospheric delay is estimated as part of the Kalman filter solution. However, a priori tropospheric information seems to provide benefits to single-frequency kinematic PPP. The Saastamoinen model is used when computing the zenith tropospheric delay. In all cases, the Neill's mapping function is applied. The studies show high correlation between receiver clock and the up coordinate. The troposphere has a high negative correlation with receiver clock and the up coordinate. However, the troposphere is more correlated with the receiver clock than the up component. All solutions incorporate corrections for solid earth tides, relativity, and satellite antenna phase center offsets. Corrections have not been applied for the phase wind-up angle. The widelane and ionospheric functions are used to detect and fix cycle slips in a semigraphical manner. Since even a single cycle slip significantly falsifies PPP solutions, it is suggested that between-satellite carrier phases be used as another way of detecting slips (now since SA has been discontinued). The software consists mostly of highly modular Mathcad functions that form an excellent base for continued research of PPP. Note de contenu : 1. Introduction
1.1. Research goals
1.2. Motivation
1.3. Previous relevant works
1.4. Approach
1.5. Thesis organization
2. Background
2.1. The GPS system
2.2. The GLONASS system
2.3. Components of PPP
3. Geophysical models
3.1. Deformable Earth
3.2. Solid Earth tides
3.3. Ocean loading
3.4. Plate tectonic motion
3.5. Atmospheric tides
4. International terrestrial reference frame (ITRF)
4.1. General statements on reference frames
4.2. The ITRF
4.3. Transformation between ITRFs
4.4. Orientation and origin of the ITRF
4.5. The draft ITRF-2000 reference frame
4.6. GPS WGS-84
4.7. Agreement between WGS-84 and ITRF
5. Troposphere and ionosphere
5.1. Standard atmosphere
5.2. Troposhpere
5.3. Ionosphere
6. Precise IGS orbit and satellite clock
6.1. IGS orbital analysis and its products
6.2. The SP3 ephemeris
6.3. Lagrange interpolation
7. Mathematical implementations
7.1. Dilution of precision
7.2. Cycle slip detection and removal
7.3. Kalman filter
8. Numerical study and results
8.1. Data sets
8.2. A priori Kalman filter settings
8.3. Analysis Example
8.4. Experiments
9. Conclusions and recommendations
9.1. Conclusions
9.2. RecommendationsNuméro de notice : 19800 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Thèse étrangère Note de thèse : PhD thesis : Spatial Information Science and Engineering : Maine : 2000 Organisme de stage : The University of Maine DOI : sans En ligne : https://www.academia.edu/583010/Elements_of_GPS_precise_point_positioning Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=85126 Documents numériques
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Titre : Cataloging paradigms for spatial metadata Type de document : Thèse/HDR Auteurs : Steven M. Frank, Auteur Editeur : Maine [Etats-Unis] : University of Maine Année de publication : 1994 Importance : 132 p. Format : 21 x 30 cm Note générale : Bibliographie
A thesis submitted in partial fulfillment of the requirements for the PhD Degree in Surveying EngineeringLangues : Anglais (eng) Descripteur : [Vedettes matières IGN] Infrastructure de données
[Termes IGN] catalogue de données localisées
[Termes IGN] Etats-Unis
[Termes IGN] infrastructure nationale des données localisées
[Termes IGN] métadonnées géographiques
[Termes IGN] protocoleIndex. décimale : THESE Thèses et HDR Résumé : (auteur) The transfer of information from paper based to electronic forms raises questions about how this information might be most easily and reliably found and accessed in a vast network of interconnected computers. This thesis examines specifically how spatial (geographic) information might be handled in such a network. It first examines the current state of spatial data cataloging. It then looks at how spatial resources (in the forms of archived data sets, active databases, analytical software, and automated services) might be arranged in the National Information Infrastructure by developing limited scenarios of spatial resource interactions. Five possible paradigms (based on trends in current electronic access mechanisms) to catalog these scenarios are compared. Service protocols, conceptual models for developing intelligent computer to computer exchanges, were found to be the most pragmatic choice of possible cataloging paradigms. Two examples of spatial resource service protocols are developed and presented. Note de contenu : 1. Introduction
1.1. The National Information Infrastructure
1.2. Spatial Resources
1.3. Spatial Resource Issues in the National Information Infrastructure
1.4. Spatial Metadata
1.5. Motivation
1.6. Approach and Constraints
1.7. Contributions
2. Literature and technology review
2.1. Cataloging
2.2. Networking
3. An analysis of existing spatial resources
3.1. A Taxonomy for Classifying Spatial Cataloging and Indexing Systems
3.2. Bibliographic Based Systems
3.3. Customized Systems
3.4. MetaGIS Systems
3.5. Non Cataloging Systems
3.6. Summary of System Approaches
3.7. Summary
4. Designing infrastructure navigation strategies
4.1. Spatial Data Infrastructure Scenarios
4.2. Infrastructure Navigation Paradigms
4.3. Summary
5. Spatial and temporal retrieval protocols
5.1. Background
5.2. Protocol Development
5.3. A Protocol for Specifying Spatial Constraints
5.4. A Protocol for Specifying Temporal Constraints
5.5. Integrating Client and Server Implementations
5.6. Summary
6. Conclusions and recommendations
6.1. Summary of Thesis
6.2. Conclusions
6.3. Recommendations for Future WorkNuméro de notice : 19383 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Thèse étrangère Note de thèse : PhD thesis : Surveying Engineering : Maine : 1994 Organisme de stage : The National Science Foundation under the National Center for Geographic Information and Analysis Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=82299 Réservation
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Titre : Temporal reasoning in cadastral systems Titre original : [Raisonnement temporel dans les systèmes cadastraux] Type de document : Thèse/HDR Auteurs : Khaled Al-Taha, Auteur Editeur : Maine [Etats-Unis] : University of Maine Année de publication : 1992 Importance : 211 p. Format : 21 x 30 cm Note générale : Bibliographie
Philosophy Doctorate Dissertation, Department of Surveying EngineeringLangues : Anglais (eng) Descripteur : [Vedettes matières IGN] Cadastre numérique
[Termes IGN] base de connaissances
[Termes IGN] base de données foncières
[Termes IGN] base de données temporelles
[Termes IGN] cadastre
[Termes IGN] enregistrement immobilier
[Termes IGN] logique modale
[Termes IGN] prototype
[Termes IGN] raisonnement temporel
[Termes IGN] relation topologique
[Termes IGN] système d'information géographiqueIndex. décimale : THESE Thèses et HDR Résumé : (auteur) Recently, temporal reasoning is getting more attention in GIS. From 1985 until the present, the number of research groups working on temporal GIS has noticeably increased. Yet, much research must still be done before temporal GIS become available. Information systems have to consider temporal data to answer queries that could not be answered otherwise, such as: "Which town had the greatest increase in population last year?" We believe that a detailed case study was necessary to determine the actual-reasoning structures and requirements in temporal GIS. Cadastral systems provide us with such an example. A cadastral system must include temporal data to answer queries as: "Who owned this house in 1988?" The goal of this thesis is to understand the reasoning powers in traditional cadastral systems better. We are studying the process of recording and inferring about rights in traditional cadastral systems to obtain the underlying logic-base. Once we understand how the reasoning is done in such systems, we can formalize their conceptual entities and operations. Temporal reasoning is necessary for knowledge-based cadastral systems that will make assertions and inferences to assist users in making their decisions more easily and reliably. To achieve this goal, we need to gain a clear understanding of the temporal aspects, rules and operations used in the reasoning about cadastral records. The objectives for achieving this goal are (1) to study and analyze the needed expressive power for temporal data in cadastral systems; (2) to identify and formalize the conceptual entities of a cadastral system; (3) to formalize, with a temporal logic, procedures for an intelligent search and to make inferences about temporal events in these systems; and (4) to prove the correctness of the concept by implementing a prototype. The major contribution of this study is to provide the different temporal reasoning powers in cadastral systems, to provide a formal description of the legal and topological reasoning in them, and to provide us with the temporal logic that is necessary for it. Note de contenu : 1. Introduction
1.1. GIS and Dynamic World
1.2. Thesis goal
1.3. approach
1.4. Thesis contribution
2. Temporal reasoning models and temporal databases
2.1. Introduction
2.2. Issues in temporal reasoning
2.3. Temporal reasoning models
2.4. Temporal databases
2.5. Related work on temporal GIS
2.6. Summary
3.Temporal issues in cadastral systems
3.1. Introduction
3.2. Review of cadastral systems
3.3. Changes in a cadatre
3.4. Sample queries and reasoning examples
3.5. Summary
4. Temporal representation in cadatral system
4.1. Introduction
4.2. Time perspectives
4.3. Time primitives and time duration
4.4. Actions and their temporal effects
4.5. Summary
5. A temporal logic for deed-recording systems
5.1. Introduction
5.2. Predicate calculus (First-Order Logic)
5.3. A temporal reasoning model for deed-recording cadastral systems
5.4. Deed recording systems
5.5. Temporal reasoning examples
5.6. Summary
6. A knowledge-based temporal cadatral system
6.1. Introduction
6.2. Review of conceptual-Design models
6.3. Conceptual entities in the deed-recording cadastral system
6.4. Conceptual design of the deed recording cadastral system
6.5. Abstract representations of cadastral data-types
6.6. Summary
7. Pilot-Implementation
7.1. Introduction
7.2. Prototype
7.3. User interface
7.4. Reasoning abbout real estate records
7.5. Implementation issues for real data
7.6. Summary
8. Conclusions and Recommandations
8.1. Introduction
8.2. Summary of Thesis work
8.3. Results and major findings
8.4. Recommendations for future work
8.5. Open questionsNuméro de notice : 61697 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Thèse étrangère Note de thèse : PhD dissertation : Ingénierie géomatique : Maine : 1992 Organisme de stage : Department of Surveying Engineering Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=45865 Réservation
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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 EngineeringLangues : 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 donnéesIndex. 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 WorkNuméro 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 Réservation
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