Descripteur
Termes IGN > géomatique > données localisées
données localiséesSynonyme(s)spatial data ;données géospatiales ;données géographiques données à référence spatialeVoir aussi |
Documents disponibles dans cette catégorie (3470)
Ajouter le résultat dans votre panier
Visionner les documents numériques
Affiner la recherche Interroger des sources externes
Etendre la recherche sur niveau(x) vers le bas
Spatial data infrastructure to inspire Scotland / Steven Ramage (2007)
Titre : Spatial data infrastructure to inspire Scotland Type de document : Article/Communication Auteurs : Steven Ramage, Auteur Editeur : Londres : Association for Geographic Information AGI Année de publication : 2007 Conférence : AGI 2007, conference Inspiring Scotland 15/11/2007 Royaume-Uni Importance : 7 p. Format : 21 x 30 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Infrastructure de données
[Termes IGN] données localisées
[Termes IGN] Ecosse
[Termes IGN] infrastructure nationale des données localisées
[Termes IGN] qualité des donnéesRésumé : (Auteur) Scotland is uniquely positioned to become the leading regional entity in Great Britain. The importance of federalism is self-evident to those in the European Community. This paper examines the opportunity to use spatial data to create an effective regional entity in Scotland. The paper examines the experiences in Australia and Northern Ireland. It attempts to draw on the experiences particularly from Northern Ireland and draw some generic conclusions. Numéro de notice : 13922 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Communication Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=64304 The European information society : Leading the way with geo-information, AGILE 2007 / Sara Irina Fabrikant (2007)
Titre : The European information society : Leading the way with geo-information, AGILE 2007 : [selected papers, 10th AGILE conference, 2007, Aalborg, Denmark] Type de document : Actes de congrès Auteurs : Sara Irina Fabrikant, Éditeur scientifique ; Monica Wachowicz, Éditeur scientifique Editeur : Berlin, Heidelberg, Vienne, New York, ... : Springer Année de publication : 2007 Collection : Lecture notes in Geoinformation and Cartography, ISSN 1863-2246 Conférence : AGILE 2007, 10th International Conference on Geographic Information Science 15/11/2007 Aalborg Danemark OA Proceedings Importance : 486 p. Format : 16 x 24 cm Accompagnement : Sans Cédérom ISBN/ISSN/EAN : 978-3-540-72384-4 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique
[Termes IGN] convivialité
[Termes IGN] données localisées
[Termes IGN] état de l'art
[Termes IGN] Infrastructure de données
[Termes IGN] interopérabilité
[Termes IGN] modèle 3D de l'espace urbain
[Termes IGN] monde virtuel
[Termes IGN] objet mobile
[Termes IGN] ontologie
[Termes IGN] qualité des données
[Termes IGN] raisonnement spatial
[Termes IGN] service web géographiqueRésumé : (éditeur) The Association of Geographic Information Laboratories for Europe (AGILE) was established in early 1998 to promote academic teaching and research on GIS at the European level. AGILE seeks to ensure that the views of the geographic information teaching and research community are fully represented in the discussions that take place on future European - search agendas and it also provides a permanent scientific forum where geographic information researchers can meet and exchange ideas and - periences at the European level. In 2007 AGILE provided - for the first time since its existence - a book constituting a collection of scientific papers that were submitted as full papers to the annual AGILE conference and went through a competitive and thorough review process. Numéro de notice : 17088 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Actes DOI : 10.1007/978-3-540-72385-1 En ligne : https://doi.org/10.1007/978-3-540-72385-1 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=79464 Réservation
Réserver ce documentExemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 17088-01 CG2007 Livre Centre de documentation Congrès Disponible Une topographie plus précise / Françoise de Blomac in SIG la lettre, n° 83 (janvier 2007)
[article]
Titre : Une topographie plus précise Type de document : Article/Communication Auteurs : Françoise de Blomac, Auteur Année de publication : 2007 Article en page(s) : pp 8 - 9 Langues : Français (fre) Descripteur : [Vedettes matières IGN] Topographie moderne
[Termes IGN] BD Alti
[Termes IGN] bruit (théorie du signal)
[Termes IGN] données bathymétriques
[Termes IGN] données lidar
[Termes IGN] données localisées 3D
[Termes IGN] France (administrative)
[Termes IGN] hélicoptère
[Termes IGN] Lidar
[Termes IGN] Litto3D
[Termes IGN] modèle numérique de surface
[Termes IGN] modèle numérique de terrain
[Termes IGN] précision altimétrique
[Termes IGN] précision centimétrique
[Termes IGN] signal laser
[Termes IGN] Suisse
[Termes IGN] télémétrie laser aéroporté
[Termes IGN] végétationRésumé : (Auteur) Même si les volumes de données générés par les LIDAR sont très importants, ils permettent de créer des modèles numériques très précis, fort prisés dans le domaine de la topographie. Nos collègues suisses sont les premiers à s'être lancés dans un projet d'envergure nationale. Numéro de notice : A2007-003 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28369
in SIG la lettre > n° 83 (janvier 2007) . - pp 8 - 9[article]Réservation
Réserver ce documentExemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 286-07011 RAB Revue Centre de documentation En réserve L003 Disponible Towards a rigorous logic for spatial data representation / R.J. Thompson (2007)
Titre : Towards a rigorous logic for spatial data representation Type de document : Monographie Auteurs : R.J. Thompson, Auteur Editeur : Delft : Netherlands Geodetic Commission NGC Année de publication : 2007 Collection : Netherlands Geodetic Commission Publications on Geodesy, ISSN 0165-1706 num. 65 Importance : 332 p. Format : 17 x 24 cm ISBN/ISSN/EAN : 978-90-6132-303-7 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes d'information géographique
[Termes IGN] données localisées
[Termes IGN] données vectorielles
[Termes IGN] logique
[Termes IGN] modèle conceptuel de données localisées
[Termes IGN] primitive géométrique
[Termes IGN] représentation des données
[Termes IGN] traitement automatique de donnéesRésumé : (Auteur) [Organisation de la thèse]
Chapter 1 (this chapter) introduces the motivation for the research, and the specific problem being addressed, delineates the scope of the research, and defines some of the nomenclature to be used. Finally there is a summary, including the contribution of this research and an overview of the thesis.
Chapter 2 identifies a number of case studies which illustrate some of the major issues involved in currently used digital representations of spatial data. In most of these instances, a significant failure of the logic of the computer representation can occur, albeit in rare circumstances.
Chapter 3 presents a perspective on the history and current status of the field, and reviews some of the alternative approaches that have been, and are being investigated by other researchers. Research into the specific issue of representing the spatial information in computer form is highlighted in this chapter, rather than the larger body of work that concentrates on the mathematical model, some examples of which are included as background information.
Chapter 4 introduces a construct which has potential in addressing and solving the issues. This is named the "regular polytope", and is rigorously defined. The properties are explored, and the space of regular polytopes is shown to be a metric topology, and to be a Boolean algebra. In addition, the regular polytope is shown to be "regular" in the topological sense (see Section 1.4.4). Finally, the issue of detection of overlap and equality is explored, first for the purely integer-based representation, and then for a representation based on rational numbers with a limited range of quotients and divisors.
Chapter 5 addresses the issue of connectivity, which is a critical issue in the storage, query and manipulation of spatial data. In seeking a useful definition, it is found that a single definition is not sufficient to all requirements, so the two most useful (to be known as Ca and Cb)7 are discussed in detail. Finally, these are applied to the regular polytope representation of spatial regions, using the integer and the domain restricted (finite precision) rational representations as defined in Chapter 4.
Chapter 6 discusses alternative approaches to spatial algebra, and relates the functionality of the regular polytope representation to these. The expressiveness of the regular polytope approach is considered in relation to: The regional connection calculus (Randell et al. 1992), The proximity space (Naimpally and Warrack 1970) and the Boolean connection algebra (Stell 1999). Use is also made of the "Egenhofer 9-intersection matrix" in these discussions for comparison purposes. This is followed by a discussion of the richness of the algebra provided in comparison with other possibilities. Finally, the relationship between this work and the constraint database (Kuper et al. 2000) approach is explored.
Chapter 7 presents some alternate data models that could be used to implement the approach in a database management system. For comparison purposes, a brief summary of conventional vertex representation of polyhedra is included. A basic data model for storage of spatial data in regular polytope form is then described. An alternative model, the "approximated polytope", is introduced which, while retaining the rigour of the regular polytope will address some practical issues, using a storage form more closely aligned to the point/line/polygon paradigm. Also included are basic strategies for topological encoding, with a discussion of practical issues raised by these models.
Chapter 8 describes the implementation of a demonstration set of Java classes, intended as a tool for the practical review of the approach. The implementation is described, the test cases illustrated and some of the practical considerations that arose as a result documented. Special reference is made to the significant issue that arises in cadastral applications of the mixture of 2D and 3D definitions. This chapter gives an indication of the further development that is needed for a full implementation, and contains a discussion of the practicalities involved in converting geo-information to the regular polytope form from the conventional vertex representations.
Chapter 9 Revisits the case studies from Chapter 2 to highlight their solutions using the regular polytope.
Chapter 10 contains the conclusions that can be drawn from the research, summarising the findings in terms of the research question and the results obtained. There is scope for further research in this subject area, and this is also identified.
A bibliography of references follows.
Appendix I contains a summary of the definitions, axioms and assumptions used throughout the thesis.
Appendix II contains proofs of assertions that apply to half spaces, as made in the body of the work.
Appendix III contains proofs of assertions that apply to the integer representation of regular polytopes.
Appendix IV contains proofs of assertions that apply to the domain-restricted rational number representation of regular polytopes.
Appendix V contains the header documentation for selected classes and methods from the Java implementation discussed in Chapter 8.
Appendix VI contains the details of the encoding used in the Java demonstration classes.
Appendix VII contains some calculations of data storage requirements that can be expected for the various data models proposed in Chapter 7. Also included, for comparison are some estimated requirements for similar objects to be stored as conventional vertex representations with and without topological encoding.Note de contenu : 1. Introduction.
1.1. Research Question
1.2. Research Approach
1.3. Scope of Research
1.4. Nomenclature
1.5. Computational Representation of Vector Spatial Data .
1.6. Contribution of this Work.
1.7. Organisation of the Thesis
2. Case Studies.
2.1. Case 1. Polygon Union
2.2. Case 2. Data Interchange.
2.3. Case 3. ISO 19107 Definition of Equality .
2.4. Case 4. ISO 19107 Definition of Simplicity
2.5. Case 5. Intersection of a Point with a Line.
2.6. Case 6. Narrow Cadastral Parcels
2.7. Case 7. 3D Surfaces and Lines
2.8. Case 8. ISO 19107 Definition of "interior to" association
2.9. Case 9. Adjoining polygon points.
3. Related Work and Theory.
3.1. Historic Perspective
3.2. Spatial Logic.
3.3. Precision of Calculations and Representation
3.4. The Digital Representation .
3.5. Conclusions
4. The Regular Polytope Representation.
4.1. The Regular Polytope.
4.2. Properties of the Regular Polytope Representation
4.3. Integer Approach
4.4. Domain-Restricted Rational Number Approach
4.5. Floating Point Number Approach.
4.6. Conclusion
5. Connectivity in the Regular Polytope Representation.
5.1. Connectivity of Geometric Objects.
5.2. Connectivity of Convex Polytopes.
5.3. Connectivity of Regular Polytopes
5.4. Properties of CA and CB .
5.5. Further Connectivity Relations
5.6. Partitioning of Space
5.7. Robustness of Regular Polytopes.
5.8. Robustness of Connected Regular Polytopes
5.9. Conclusions
6. Algebras of Connectivity.
6.1. The Region Connection Calculus (RCC)
6.2. The Spatial Relations on Regular Polytopes
6.3. Dimensionality of Overlap.
6.4. Proximity Space
6.5. Boolean Connection Algebra
6.6. Properties of the Space of Regular Polytopes .
6.7. The Convex Hull.
6.8. Expressiveness of the Relations and Functions.
6.9. Relationship with Constraint Databases
6.10. Conclusions
7. The Data Model
7.1. Vertex-based Representations.
7.2 The Discrete Regular Polytope Model
7.3. Topological Encoding of Regular Polytopes
7.4. The Approximated Polytope Model.
7.5. Extension to Topological Encoding.
7.6. Spatial Indexing of the Regular Polytope
7.7. Relationship with Other Approaches
7.8. Summary of Data Volumes.
7.9. Conclusions.
8. Implementation Issues
8.1. Rationale for the Approach Taken
8.2. Description of the Java Objects.
8.3. Proof of Concept Data
8.4. Algorithmic Complexity.
8.5. Optimising the Model
8.6. Data Load Issues.
8.7. Conclusions
9. Review of Case Studies.
9.1. Case 1. Polygon Union.
9.2. Case 2. Data Interchange
9.3. Case 3. ISO 19107 Definition of equalsQ
9.4. Case 4. ISO 19107 Definition of isSimpleQ
9.5. Case 5. Intersection of a Point with a Line.
9.6. Case 6. Narrow Cadastral Parcels
9.7. Case 7. 3D Surfaces and Lines
9.8. Case 8. ISO 19107 Definition of "interior to" Association
9.9. Case 9. Adjoining Polygon Points.
9.10. Case 10. 3D Cadastre Issues
9.11. Case 11. Datum Conversion.
9.12. Case 12. Uniqueness Of Representation
9.13. Case 13. GeoTools/GeoAPI definition of Object.equalsQ
9.14. Conclusions
10. Conclusions
10.1. Application of the Regular Polytope to Lower Dimensionality
10.2. Learnings and Future Research.
10.3. Conclusion
Bibliography
Appendix I Definitions and Axioms.
Appendix II Proof of Assertions on Half Space Operations.
Appendix III Proof of Assertions for the Integer Interpretation
Appendix IV Proofs of Assertions on the Dr-Rational Interpretation
Appendix V Selected Java Documentation .
Appendix VI Encoding of the Regular Polytope.
Appendix VII Data Storage Requirement Estimates.
Summary.
Nederlandse Samenvatting
Curriculum VitaeNuméro de notice : 15360 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Monographie Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=62702 Réservation
Réserver ce documentExemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 15360-01 37.30 Livre Centre de documentation Géomatique Disponible 3D physical versus empirical models for HR sensor orientation and elevation extraction: examples with Ikonos and Quickbird / Thierry Toutin in Revue Française de Photogrammétrie et de Télédétection, n° 184 (Décembre 2006)
[article]
Titre : 3D physical versus empirical models for HR sensor orientation and elevation extraction: examples with Ikonos and Quickbird Type de document : Article/Communication Auteurs : Thierry Toutin , Auteur ; P. Schauer, Auteur Année de publication : 2006 Conférence : ISPRS 2006, Commission 1 Symposium, From sensors to imagery 03/07/2006 06/07/2006 Champs-sur-Marne [Paris Marne-la-Vallée] France OA ISPRS Archives Article en page(s) : pp 115 - 120 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique
[Termes IGN] altitude
[Termes IGN] analyse comparative
[Termes IGN] compensation par moindres carrés
[Termes IGN] données lidar
[Termes IGN] image Ikonos
[Termes IGN] image Quickbird
[Termes IGN] modèle numérique de surface
[Termes IGN] modèle par fonctions rationnelles
[Termes IGN] orientation du capteur
[Termes IGN] point d'appuiRésumé : (Auteur) Elevations for digital surface model (DSM) generation were extracted from different stereo high-resolution (HR) images (QuickBird and Ikonos) using 3D physical and empirical geometric models. The 3D physical model is Toutin's model (TM) developed at the Canada Centre for Remote Sensing, and the empirical model is the rational function model (RFM). First, Vendor-supplied RFMs refined with polynomial functions and TM were compared for the sensor orientations with least-squares adjustments with different number of ground control points (GCPs). TM and RFMs gave similar results with Ikonos as soon as RFM was refined with a shift computed from at least one GCP. On the other hand, TM gave better results than RFMs with QuickBird regardless of the number of GCPs. Due to relief dependency, QuickBird RFM needed to be refined at least with linear functions computed from at least 6-10 GCPs. Some large errors were, however, noted on forward image RFM in column. The stereo-extracted elevations of DSMs were then compared to 0.2-m accurate Lidar elevation data. Because DSM stereo-extracted elevations included the height of land covers (trees, houses), elevation linear errors with 68 percent confidence level (LE68) were computed for the entire area and three land-cover classes (forested, urban/residential, bare surface). TM and RFMs with Ikonos, regardless of the method and GCP number, achieved comparable results for all classes while TM achieved overall better results than RFMs with QuickBird. All results demonstrated the necessity of refining Ikonos RFM with a tri-directional shift and at least one GCP but QuickBird RFM with 1st order linear functions and 6-10 GCPs. Copyright SFPT Numéro de notice : A2006-642 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueNat DOI : sans En ligne : https://www.isprs.org/proceedings/XXXVI/part1/Papers/PS1-06.pdf Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28365
in Revue Française de Photogrammétrie et de Télédétection > n° 184 (Décembre 2006) . - pp 115 - 120[article]Réservation
Réserver ce documentExemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 018-06041 RAB Revue Centre de documentation En réserve L003 Disponible Automatically conflating road vector data with orthoimagery / C.C. Chen in Geoinformatica, vol 10 n° 4 (December 2006)PermalinkCensus of natural resources with earth observation and GIS : a proto-type from India / R.K. Jaiswail in Geocarto international, vol 21 n° 4 (December 2006 - February 2007)PermalinkChange detection techniques for canopy height growth measurements using airborne laser scanner data / X. Yu in Photogrammetric Engineering & Remote Sensing, PERS, vol 72 n° 12 (December 2006)PermalinkLes chercheurs rendent les cartes actives et inversement... : compte rendu de réunion du groupe de travail Cartactive du GDR SIGMA / Sébastien Mustière in Le monde des cartes, n° 190 (décembre 2006 - février 2007)PermalinkDetermination of exterior orientation using linear features from vector maps / Mika Karjalainen in Photogrammetric record, vol 21 n° 116 (December 2006 - February 2007)PermalinkExamining the influence of changing laser pulse repetition frequencies on conifer forest canopy returns / Laura Chasmer in Photogrammetric Engineering & Remote Sensing, PERS, vol 72 n° 12 (December 2006)PermalinkExtracting photogrammetric ground control from lidar DEMs for change detection / T.D. James in Photogrammetric record, vol 21 n° 116 (December 2006 - February 2007)PermalinkFast cluster polygonization and its applications in data-rich environments / I. Lee in Geoinformatica, vol 10 n° 4 (December 2006)PermalinkGéoportail : le portail des territoires et des citoyens / Patrick Leboeuf in Le monde des cartes, n° 190 (décembre 2006 - février 2007)PermalinkLocal accuracy measures for digital terrain models / Karl Kraus in Photogrammetric record, vol 21 n° 116 (December 2006 - February 2007)Permalink