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Regional crop inventories in Europe assisted by remote sensing, 1988-1993 / C. Taylor (1997)

Public Titre : Regional crop inventories in Europe assisted by remote sensing, 1988-1993 : Synthesis report of the Mars project, action 1 Type de document : Rapport Auteurs : C. Taylor, Auteur ; C. Sannier, Auteur ; J. Delince, Auteur ; F.J. Gallego, Auteur Editeur : Luxembourg : Office des Publications de l'Union Européenne Année de publication : 1997 Collection : Space Applications Institute Importance : 71 p. Format : 16 x 23 cm Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Agriculture [Termes IGN] classification [Termes IGN] Communauté Européenne [Termes IGN] correction géométrique [Termes IGN] cultures [Termes IGN] image Landsat-TM [Termes IGN] image SPOT XS [Termes IGN] image SPOT-HRV [Termes IGN] inventaire [Termes IGN] télédétection spatiale Résumé : (Auteur) This report is a synthesis of the work, the results and an assessment of the achievements of Action I of the MARS Project. The report consist of this stand-alone executive summary and five additional sections. The first three enlarge on the main elements of the methodology : ground survey, remote sensing and the combination of these using regression. These sections also present a synthesis of the results and comments on their accuracy. Note de contenu : 1. CROP INVENTORY BY GROUND SURVEY 1.1 General Statistical Methodology 1.1.1 Summary of approach at each study site 1.1.2 Sample selection 1.1.3 Direct expansion estimates 1.1.4 Stratification 1.1.5 Example of stratified sample design 1.1.6 Efficiency of stratification 1.2 Application and variations. 1.2.1 Survey design 1.2.2 Field work 1.2.3 Data processing 1.3 Results and Conclusions 1.3.1 Accuracy of area estimates. 1.3.2 Timeliness of results 1.3.3 Efficiency of stratification 1.3.4 Yield estimates 2. SATELLITE REMOTE SENSING 2.1 Achievement of satellite image coverage 2.1.1 Satellite images used for regional inventories 2.1.2 Acquisition of satellite images 2.2 Remote sensing methodology 2.2.1 Fundamental concepts 2.2.2 Technical principles of geometric correction 2.2.3 Estimating the accuracy of geometric transformation 2.2.4 Technical principles of digital classification 2.2.5 Assessing the accuracy of digital classification 2.3 Application and results 2.3.1 Geometric correction 2.3.2 Classification of satellite imagery 2.3.3 Classification accuracy assessment 2.3.4 Timeliness 2.3.5 Yield estimation by remote sensing 3. CROP INVENTORY WITH REMOTE SENSING . 3.1 Methodology 3.1.1 Introduction 3.1.2 Relationship between ground survey and digital classification 3.1.3 The regression estimator 3.1.4 Neostratification imposed by satellite imagery. 3.1.5 Cost benefit of remote sensing 3.1.6 Implementation of the methodology 3.2 Results.. 3.2.1 Improvement of estimates of main crop areas 3.2.2 Variation of results across test sites 3.2.3 Improved accuracy of crop area estimates vs. class area 3.2.4 Cost-effectiveness 3.2.5 Comparison with national statistics 3.2.6 Timeliness 3.2.7 Comparison with USDA-NASS results 4. TECHNICAL FACTORS INFLUENCING RESULTS. 4.1 Accuracy of ground surveys 4.2 Success of image coverage 4.3 Quality of geometric correction 4.4 Quality of regression relationships 4.5 Comments on Neostratification 4.6 Relationship between classification accuracy and improvement in precision . 4.7 Effect of different digital classification rules Numéro de notice : 16739 Affiliation des auteurs : non IGN Nature : Rapport d'étude technique Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=41311

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Code-barres	Cote	Support	Localisation	Section	Disponibilité
16739-01	50.40	Livre	Centre de documentation	Environnement	Disponible

Conceptual, spatial and temporal referencing of multimedia objects / Christopher B. Jones (12/08/1996)

Public contenu dans Advances in GIS Research 2 : proceedings SDH'96, Volume 1. Proceedings of the 7th International symposium on spatial data handling SDH'96 / Menno-Jan Kraak (1996) Titre : Conceptual, spatial and temporal referencing of multimedia objects Type de document : Article/Communication Auteurs : Christopher B. Jones, Auteur ; C. Taylor, Auteur ; D. Tudhope, Auteur ; P. Beynon-Davies, Auteur Editeur : Delhi, Washington, Delft... : International Geographical Union IGU Année de publication : 12/08/1996 Conférence : SDH 1996, 7th International symposium on spatial data handling 12/08/1996 16/08/1996 Delft Pays-Bas Importance : 12 p. Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Information géographique [Termes IGN] données localisées [Termes IGN] données spatiotemporelles [Termes IGN] information géographique [Termes IGN] information sémantique [Termes IGN] modélisation [Termes IGN] multimedia [Termes IGN] proximité sémantique [Termes IGN] requête spatiale [Termes IGN] réseau sémantique [Termes IGN] système d'information géographique Résumé : (Auteur) The increasing usage in GIS of multimedia objects, such as scanned photographs and video recordings, has introduced the need to provide flexible indexing methods to help in accessing objects that may be of relevance to a range of possible applications. An experimental system is described in which media objects may be referenced to several classifications concepts, as well as qualitative descriptions of geographic location and time period. Semantic modelling techniques are used to create semantic networks that represent the hierarchical and lattice structures of conceptual, temporal and geographic space. The associated query methods enable inexact matching between user interests and the media object descriptors. Several metrics of semantic closeness, in concept, time and geography have been developped, based on scaled measures of path lengths within the semantic networks that represent the three dimensions of indexing. Numéro de notice : C1996-022 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Communication DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=65641