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The British active GPS network: OS for the future / C. Fane in Geoinformatics, vol 8 n° 1 (01/02/2005)
[article]
Titre : The British active GPS network: OS for the future Type de document : Article/Communication Auteurs : C. Fane, Auteur ; P. Cruddace, Auteur ; M. Greaves, Auteur Année de publication : 2005 Article en page(s) : pp 24 - 27 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] base de données topographiques
[Termes IGN] données localisées
[Termes IGN] géomètre-expert
[Termes IGN] Grande-Bretagne
[Termes IGN] Ordnance Survey (UK)
[Termes IGN] réseau géodésique permanent
[Termes IGN] utilisateurRésumé : (Auteur) As Great Britain's national mapping organisation, Ordnance Survey maintains and makes available the definitive geographical framework for the country. A key element of this is the deployment of some 300 field surveyors to maintain and enhance the National Topographic Database. They collect, manage and make available data on roads, buildings, addresses, boundaries, water courses, height and many other aspects of the national landscape. The resulting geographic information is used extensively and many forms by government, businesses and citizens alike. Numéro de notice : A2005-063 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27201
in Geoinformatics > vol 8 n° 1 (01/02/2005) . - pp 24 - 27[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 262-05011 SL Revue Centre de documentation Revues en salle Disponible Integrating land-cover data with different ontologies: identifying change from inconsistency / A. Comber in International journal of geographical information science IJGIS, vol 18 n° 7 (november 2004)
[article]
Titre : Integrating land-cover data with different ontologies: identifying change from inconsistency Type de document : Article/Communication Auteurs : A. Comber, Auteur ; R. Wadsworth, Auteur ; Peter F. Fisher, Auteur Année de publication : 2004 Article en page(s) : pp 691 - 708 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Infrastructure de données
[Termes IGN] analyse comparative
[Termes IGN] carte d'occupation du sol
[Termes IGN] cohérence des données
[Termes IGN] détection de changement
[Termes IGN] intégration de données
[Termes IGN] jeu de données localisées
[Termes IGN] occupation du sol
[Termes IGN] ontologie
[Termes IGN] Royaume-Uni
[Termes IGN] série temporelleRésumé : (Auteur) Spatially coincident land-cover information frequently varies due to technological and political variations. This is especially problematic for timeseries analyses. We present an approach using expert expressions of how the semantics of different datasets relate to integrating temporal time series landcover information where the classification classes have fundamentally changed. We use land-cover mapping in the UK (LCMGB and LCM2000) as example data sets because of the extensive object-based meta-data in the LCM2000. Inconsistencies between the two datasets can arise from random, gross and systematic error and from an actual change in land cover. Locales of possible land-cover change are inferred by comparing characterizations derived from the semantic relations and meta-data. Field visits showed errors of omission to be 21% and errors of commission to be 28%, despite the accuracy limitations of the land-cover information when compared with the field survey component of the Countryside Survey 2000. Numéro de notice : A2004-397 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810410001705316 En ligne : https://doi.org/10.1080/13658810410001705316 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26924
in International journal of geographical information science IJGIS > vol 18 n° 7 (november 2004) . - pp 691 - 708[article]Réservation
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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 Evaluation of hyperspectral remote sensing as a means of environmental monitoring in the St Austell China clay (kaolin) region, Cornwall, UK / R.J. Ellis in Remote sensing of environment, vol 93 n° 1 (30/10/2004)
[article]
Titre : Evaluation of hyperspectral remote sensing as a means of environmental monitoring in the St Austell China clay (kaolin) region, Cornwall, UK Type de document : Article/Communication Auteurs : R.J. Ellis, Auteur ; P.W. Scott, Auteur Année de publication : 2004 Article en page(s) : pp 118 - 130 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] Argile
[Termes IGN] carte géologique
[Termes IGN] Cornouailles
[Termes IGN] éclairement lumineux
[Termes IGN] étalonnage radiométrique
[Termes IGN] image HYMAP
[Termes IGN] image hyperspectrale
[Termes IGN] minerai
[Termes IGN] surveillance géologiqueRésumé : (Auteur) The St. Austell granite of Cornwall, UK contains internationally important deposits of kaolin (china clay), the formation of which result from the alteration of a composite pluton of mineralogically and texturally different primary granite units. To assess the applicability of hyperspectral remote sensing in the St. Austell china clay region, one line of airborne HyMap® hyperspectral data was acquired. These data were processed to correct for atmospheric and illumination effects by calibration from radiance to reflectance data, so that mineral abundance maps could be produced. Minerals associated with the primary granite and its subsequent kaolinisation were identified by image processing and used as mapping endmembers. These minerals include kaolinite, kaolinite with smectite, montmorillonite, muscovite, lepidolite (a lithium mica) and topaz.
Hyperspectral data analysis allowed for the identification of the different primary granite units. The spectrally observed compositional differences of the biotite and topaz granite units of the region allowed for fingerprinting of the source of mined waste material as originating from specific pits. The majority of waste tips in the region originate from the nearest china clay workings. However, waste material used in the construction of a mica dam and also as backfill in a disused pit is successfully identified to have been transported across a mapped granite boundary for storage. The effect of mining and mineral processing on the abundance and spatial distribution of minerals in the region is also evident. Wastetips are classified as containing the greatest abundance of mica. This distribution results from the separation of kaolinite during the mineral processing stages. Kaolinite in lower abundance, however, is also identified within these waste areas and is the result of a less than 100% recovery by mining and processing.Numéro de notice : A2004-425 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.rse.2004.07.004 En ligne : https://doi.org/10.1016/j.rse.2004.07.004 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26952
in Remote sensing of environment > vol 93 n° 1 (30/10/2004) . - pp 118 - 130[article]An assessment of the effectiveness of atmospheric correction algorithms through the remote sensing of some reservoirs / D.G. Hadjimitsis in International Journal of Remote Sensing IJRS, vol 25 n° 18 (September 2004)
[article]
Titre : An assessment of the effectiveness of atmospheric correction algorithms through the remote sensing of some reservoirs Type de document : Article/Communication Auteurs : D.G. Hadjimitsis, Auteur ; C.R.I. Clayton, Auteur Année de publication : 2004 Article en page(s) : pp 3651 - 3674 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] aéroport
[Termes IGN] analyse comparative
[Termes IGN] bande visible
[Termes IGN] correction atmosphérique
[Termes IGN] effet atmosphérique
[Termes IGN] image Landsat-TM
[Termes IGN] image multibande
[Termes IGN] Londres
[Termes IGN] radiance
[Termes IGN] radiomètre multibande
[Termes IGN] réflectance
[Termes IGN] spectroradiomètreRésumé : (Auteur) Although satellite remote sensing techniques have been widely implemented for a variety of applications, using either single or time-series images, few studies have explicitly considered atmospheric effects, and how they can most effectively be minimized. Despite the considerable number of available atmospheric correction algorithms, there is little literature concerning their relative merits. Over water bodies, atmospheric effects account for the majority of the at-satellite measured radiance in the visible bands, and therefore targets of this type provide an opportunity for assessing the effectiveness of the different methods available. This paper reports a study of atmospheric effects and their correction, using multi-spectral satellite remote sensing data for an area to the west of London that includes eight large water reservoirs and a major international airport (Heathrow). Through comparisons of reflectance within a time series of 12 Landsat-5 Thematic Mapper (TM) images, the overall impact of atmospheric contributions is shown. The available atmospheric correction literature is then reviewed, and the methods applied to the satellite imagery of the reservoirs. The results are compared with reflectances acquired using a field spectro-radiometer. A critical appraisal of the results, and of problems encountered in applying the various methods, leads to an evaluation of their value in practice. Numéro de notice : A2004-356 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431160310001647993 En ligne : https://doi.org/10.1080/01431160310001647993 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26883
in International Journal of Remote Sensing IJRS > vol 25 n° 18 (September 2004) . - pp 3651 - 3674[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 080-04161 RAB Revue Centre de documentation En réserve L003 Exclu du prêt Assessment of a semantic statistical approach to detecting land covers change using inconsistent data sets / A. Comber in Photogrammetric Engineering & Remote Sensing, PERS, vol 70 n° 8 (August 2004)
[article]
Titre : Assessment of a semantic statistical approach to detecting land covers change using inconsistent data sets Type de document : Article/Communication Auteurs : A. Comber, Auteur ; P. Fischer, Auteur ; R. Wadsworth, Auteur Année de publication : 2004 Article en page(s) : pp 931 - 938 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image
[Termes IGN] analyse diachronique
[Termes IGN] base de données d'occupation du sol
[Termes IGN] classification dirigée
[Termes IGN] détection de changement
[Termes IGN] données de terrain
[Termes IGN] interopérabilité sémantique
[Termes IGN] jeu de données localisées
[Termes IGN] métadonnées géographiques
[Termes IGN] occupation du sol
[Termes IGN] ontologie
[Termes IGN] Royaume-Uni
[Termes IGN] statistique descriptiveRésumé : (Auteur) A semantic, statistical approach to reconciling data with different ontologies is introduced. It was applied to UK land cover datasets from 1990 and 2000 in order to identify land cover change. The approach combined expression of expert opinion about how the semantics of the two datasets relate with spectral homogeneity metadata. A sample of the changes identified was assessed by field validation. Change was identified in 41 percent of the visited parcels, and all of the false positives were found to be due to classification error in either dataset. Thus, the approach reliably identifies inconsistency between two datasets, and the results indicate the suitability of uncertainty formalisms. The inclusion of extensive object-level metadata by the data producers greatly facilitates practical solutions to problems of data interoperability. Numéro de notice : A2004-308 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.70.8.931 En ligne : https://doi.org/10.14358/PERS.70.8.931 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26835
in Photogrammetric Engineering & Remote Sensing, PERS > vol 70 n° 8 (August 2004) . - pp 931 - 938[article]A framework for geographic information in Great Britain / Keith J. Murray in Cartographic journal (the), vol 41 n° 2 (August 2004)PermalinkOld Hampshire mapped: providing good access to printed county maps / J. Norgate in Cartographic journal (the), vol 41 n° 1 (June 2004)PermalinkArchaeology and wetlands: creating a management resource: surveying the bogs and marshes of England / W. Fletcher in Geoinformatics, vol 7 n° 3 (01/04/2004)PermalinkHigh-resolution imaging from space: a world-wide survey (part 3 Europe and part 4 ISS [international space station]) / Gordon Petrie in Geoinformatics, vol 7 n° 3 (01/04/2004)PermalinkOrdnance survey gears up for the next generation of transport solutions: on the road ahead! / S. Sinclair in Geoinformatics, vol 7 n° 3 (01/04/2004)PermalinkAspects organisationnels des SIG / Stéphane Roche (2004)PermalinkPermalinkMapping urban extent using satellite radar interferometry / W. Grey in Photogrammetric Engineering & Remote Sensing, PERS, vol 69 n° 9 (September 2003)PermalinkEstimating local variations in land use statistics / A. Geddes in International journal of geographical information science IJGIS, vol 17 n° 4 (june 2003)PermalinkExtending the automated zoning procedure to reconcile incompatible zoning systems / Olivier Martin in International journal of geographical information science IJGIS, vol 17 n° 2 (march 2003)Permalink