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Near real-time flood detection in urban and rural areas using high-resolution synthetic aperture radar images / D.C. Mason in IEEE Transactions on geoscience and remote sensing, vol 50 n° 8 (August 2012)
[article]
Titre : Near real-time flood detection in urban and rural areas using high-resolution synthetic aperture radar images Type de document : Article/Communication Auteurs : D.C. Mason, Auteur ; Ian J. Davenport, Auteur ; J.C. Neal, Auteur ; et al., Auteur Année de publication : 2012 Article en page(s) : pp 3041 - 3052 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image radar et applications
[Termes IGN] Angleterre
[Termes IGN] détection
[Termes IGN] image TerraSAR-X
[Termes IGN] inondation
[Termes IGN] temps réel
[Termes IGN] zone rurale
[Termes IGN] zone urbaineRésumé : (Auteur) A near real-time flood detection algorithm giving a synoptic overview of the extent of flooding in both urban and rural areas, and capable of working during night-time and day-time even if cloud was present, could be a useful tool for operational flood relief management. The paper describes an automatic algorithm using high-resolution synthetic aperture radar (SAR) satellite data that builds on existing approaches, including the use of image segmentation techniques prior to object classification to cope with the very large number of pixels in these scenes. Flood detection in urban areas is guided by the flood extent derived in adjacent rural areas. The algorithm assumes that high-resolution topographic height data are available for at least the urban areas of the scene, in order that a SAR simulator may be used to estimate areas of radar shadow and layover. The algorithm proved capable of detecting flooding in rural areas using TerraSAR-X with good accuracy, classifying 89% of flooded pixels correctly, with an associated false positive rate of 6%. Of the urban water pixels visible to TerraSAR-X, 75% were correctly detected, with a false positive rate of 24%. If all urban water pixels were considered, including those in shadow and layover regions, these figures fell to 57% and 18%, respectively. Numéro de notice : A2012-380 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2011.2178030 Date de publication en ligne : 21/02/2012 En ligne : https://doi.org/10.1109/TGRS.2011.2178030 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31826
in IEEE Transactions on geoscience and remote sensing > vol 50 n° 8 (August 2012) . - pp 3041 - 3052[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 065-2012081 RAB Revue Centre de documentation En réserve L003 Disponible Spatio-temporal MODIS EVI gap filling under cloud cover: An example in Scotland / L. Poggio in ISPRS Journal of photogrammetry and remote sensing, vol 72 (August 2012)
[article]
Titre : Spatio-temporal MODIS EVI gap filling under cloud cover: An example in Scotland Type de document : Article/Communication Auteurs : L. Poggio, Auteur ; A. Gimona, Auteur ; I. Brown, Auteur Année de publication : 2012 Article en page(s) : pp 56 - 72 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] classification pixellaire
[Termes IGN] Ecosse
[Termes IGN] image CMODIS
[Termes IGN] interpolation
[Termes IGN] krigeage
[Termes IGN] nuage
[Termes IGN] ombre
[Termes IGN] résiduRésumé : (Auteur) Time series of satellite data have an important role in the monitoring of regional and global ecosystem properties. Satellite images often present missing data due to atmospheric aerosol, clouds or other atmospheric conditions. Most methods proposed to minimise the effects of degradation and to restore signal values do not take into account the spatial and temporal correlation of the values in the pixels. The aim of this study was to propose and test a spatio-temporal interpolation method to reconstruct pixel values in MODIS data time series that are missing due to cloud cover or other image noise. The method presented and tested is an example of a hybrid Generalised Additive Model (GAM)-geostatistical space-time model, including the fitting of a smoother spatio-temporal trend and a spatial component to account for local details supported by information in covariates. The method is not limited by the type of noise or degradation of pixels values, latitude, vegetation dynamics and land uses. The application of cloud masks on the target image provided the data for a quantitative validation through the comparison between the modelled EVI values and those from the MODIS product. The method was able to restore data providing very good to adequate responses in series of simulations of missing data. The comparison of distributions showed good agreement and predictive capabilities. The spatio-temporal method always performed better and the use of kriged residuals was helpful for situations with high percentages of missing data. The spatial pattern and the local features were well preserved for cloud coverage Numéro de notice : A2012-494 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2012.06.003 En ligne : https://doi.org/10.1016/j.isprsjprs.2012.06.003 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31940
in ISPRS Journal of photogrammetry and remote sensing > vol 72 (August 2012) . - pp 56 - 72[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 081-2012061 SL Revue Centre de documentation Revues en salle Disponible Digital photogrammetry and ADAM technologies: Four software options and a case study / A. Springs in Geoinformatics, vol 15 n° 4 (01/06/2012)
[article]
Titre : Digital photogrammetry and ADAM technologies: Four software options and a case study Type de document : Article/Communication Auteurs : A. Springs, Auteur Année de publication : 2012 Article en page(s) : pp 18 - 21 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique
[Termes IGN] analyse comparative
[Termes IGN] Cornouailles
[Termes IGN] logiciel de photogrammétrie
[Termes IGN] restitution
[Termes IGN] traitement d'imageRésumé : (Auteur) This article examines digital photogrammetry. Particular reference is given to both cloud driven software like Photosynth, Image Composite Editor (ICE), Autodesk labs 123D Catch and terminal based software like ADAM Technologies' 3DM Analyst. The latter is discussed through the first UK University, all four of these software options are the put to the test through a case study of the eastern facade of St Gluvias Church, Penry, Cornwall, UK. Numéro de notice : A2012-227 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31673
in Geoinformatics > vol 15 n° 4 (01/06/2012) . - pp 18 - 21[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 262-2012041 SL Revue Centre de documentation Revues en salle Disponible Taking a walk along the bottom line / Anonyme in GEO: Geoconnexion international, vol 11 n° 5 (may 2012)
[article]
Titre : Taking a walk along the bottom line Type de document : Article/Communication Auteurs : Anonyme, Auteur Année de publication : 2012 Article en page(s) : pp 48 - 51 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement
[Termes IGN] acquisition de données
[Termes IGN] agriculture
[Termes IGN] appareil portable
[Termes IGN] Ecosse
[Termes IGN] lutte contre la pollution
[Termes IGN] pollution des eaux
[Termes IGN] risque de pollution
[Termes IGN] tablette graphiqueRésumé : (Editeur) Scotland's Environment Protection Agency uses mobile technology to save money on a long-term field data collection project. Numéro de notice : A2012-185 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31632
in GEO: Geoconnexion international > vol 11 n° 5 (may 2012) . - pp 48 - 51[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 062-2012051 SL Revue Centre de documentation Revues en salle Disponible The WISERD geoportal: A tool for the discovery, analysis and visualization of socio-economic (Meta-) data for Wales / R. Fry in Transactions in GIS, vol 16 n° 2 (April 2012)
[article]
Titre : The WISERD geoportal: A tool for the discovery, analysis and visualization of socio-economic (Meta-) data for Wales Type de document : Article/Communication Auteurs : R. Fry, Auteur ; R. Berry, Auteur ; G. Higgs, Auteur ; et al., Auteur Année de publication : 2012 Article en page(s) : pp 105 - 124 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web
[Termes IGN] données socio-économiques
[Termes IGN] géoportail
[Termes IGN] GeoServer
[Termes IGN] logiciel libre
[Termes IGN] métadonnées
[Termes IGN] OpenLayers
[Termes IGN] Pays de Galles
[Termes IGN] PostGIS
[Termes IGN] PostgreSQLRésumé : (Auteur) The Wales Institute of Socio-Economic Research, Data and Methods (WISERD) is an interdisciplinary, cross-institutional academic research group based in Wales, UK. One of the key objectives of WISERD is to develop a spatial framework that enhances a researcher's ability to discover socio-economic research data relating to Wales with the aim of encouraging collaborative research and re-use of existing data. This article describes the development of an online geoportal designed to meet this objective. Using free and open-source software (FOSS) components and services, a range of software tools has been developed to capture standards-compliant metadata for a variety of data sources. The geoportal is unique in that, in our review of over 120 geoportals worldwide, we have not previously encountered a geoportal dedicated to supporting quantitative and qualitative social science academic and policy research. A particularly innovative aspect of the geoportal has involved the building of a rich meta-database of government surveys, geo-referenced semantically-tagged qualitative data (generated from primary research), ‘grey’ data (e.g. from transcripts, journal publications, books, PhD theses) and Government administrative data. This article describes the challenges faced during the development of the WISERD Geoportal which can be accessed via http://www.wiserd.ac.uk/geoportal/. Numéro de notice : A2012-155 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/j.1467-9671.2012.01308.x Date de publication en ligne : 13/04/2012 En ligne : https://doi.org/10.1111/j.1467-9671.2012.01308.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31602
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