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Impact of imagery temporal on land-cover change detection monitoring / R.S. Lunetta in Remote sensing of environment, vol 89 n° 4 (29/02/2004)
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Titre : Impact of imagery temporal on land-cover change detection monitoring Type de document : Article/Communication Auteurs : R.S. Lunetta, Auteur ; D.M. Johnson, Auteur ; et al., Auteur Année de publication : 2004 Article en page(s) : pp 444 - 454 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] acquisition d'images
[Termes IGN] analyse diachronique
[Termes IGN] Caroline du Nord (Etats-Unis)
[Termes IGN] détection de changement
[Termes IGN] écosystème
[Termes IGN] flore locale
[Termes IGN] forêt
[Termes IGN] image Landsat-TM
[Termes IGN] luminance lumineuse
[Termes IGN] occupation du sol
[Termes IGN] surveillance forestièreRésumé : (Auteur) An important consideration for monitoring land-cover (LC) change is the nominal temporal frequency of remote sensor data acquisitions required to adequately characterize change events. Ecosystem-specific regeneration rates are an important consideration for determining the required frequency of data collections to minimize change omission errors. Clear-cut forested areas in north central North Carolina undergo rapid colonization from pioneer (replacement) vegetation that is often difficult to differentiate spectrally from that previously present. This study compared change detection results for temporal frequencies corresponding to 3-, 7-, and 10-year time intervals for near-anniversary date Landsat 5 Thematic Mapper (TM) data acquisitions corresponding to a single path/row. Change detection was performed using an identical change vector analysis (CYA) technique for all imagery dates. Although the accuracy of the 3-year analysis was acceptable (86.3%, K = 0.55), a significant level of change omission errors resulted (51.7%). Accuracies associated with both the 7-year (43.6%, K = 0. 10) and 10year (37.2%, K= 0.05) temporal frequency analyses performed poorly, with excessive change omission errors of 84.8% and 86.3%, respectively. The average rate of LC change observed over the study area for the 13-year index period (1987-2000) was approximately 1.0% per annum. Overall results indicated that a minimum of 3-4-year temporal data acquisition frequency is required to monitor LC change events in north central North Carolina. Reductions in change omission errors could probably best be achieved by further increasing temporal data acquisition frequencies to a 1-2-year time interval. Numéro de notice : A2004-071 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.rse.2003.10.022 En ligne : https://doi.org/10.1016/j.rse.2003.10.022 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26599
in Remote sensing of environment > vol 89 n° 4 (29/02/2004) . - pp 444 - 454[article]An autonomous above-water system for the validation of ocean color radiance data / G. Ziborni in IEEE Transactions on geoscience and remote sensing, vol 42 n° 2 (February 2004)
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Titre : An autonomous above-water system for the validation of ocean color radiance data Type de document : Article/Communication Auteurs : G. Ziborni, Auteur ; F. Melin, Auteur ; et al., Auteur Année de publication : 2004 Article en page(s) : pp 401 - 415 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] Adriatique, mer
[Termes IGN] analyse comparative
[Termes IGN] eaux côtières
[Termes IGN] étalonnage radiométrique
[Termes IGN] exitance spectrale
[Termes IGN] image Aqua-MODIS
[Termes IGN] image Envisat-MERIS
[Termes IGN] image Seawifs
[Termes IGN] luminance lumineuse
[Termes IGN] photométrie
[Termes IGN] radianceRésumé : (Auteur) An operational system for autonomous above-water radiance measurements, called the SeaWiFS Photometer Revision for Incident Surface Measurements (SeaPRISM), was deployed at the Acqua Alta Oceanographic Tower in the northern Adriatic Sea and used for the validation of remote sensing radiometric products in coastal waters. The SeaPRISM data were compared with simultaneous data collected from an independent in-water system for a wide variety of sun elevations along with different atmospheric, seawater, and sea state conditions. The average absolute differences between the above- and in-water determinations of water-leaving radiances (computed linearly) were less than 4.5% in the 412-555-nm spectral interval. A similar comparison for normalized water-leaving radiances showed average absolute differences less than 5.1%. The comparison between normalized water-leaving radiances computed from remote sensing and SeaPRISM matchup data, showed absolute spectral average (linear) differences of 17.0%, 22.1%, and 20.8% for SeaWiFS, MODIS, and MERIS, respectively. The results, in keeping with those produced by independent in-water systems, suggest the feasibility of operational coastal networks of autonomous above-water radiometers deployed on fixed platforms (towers, lighthouses, navigation aids, etc.) to support ocean color validation activities. Numéro de notice : A2004-137 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2003.821064 En ligne : https://doi.org/10.1109/TGRS.2003.821064 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26664
in IEEE Transactions on geoscience and remote sensing > vol 42 n° 2 (February 2004) . - pp 401 - 415[article]Réservation
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[article]
Titre : Looking after water in Africa Type de document : Article/Communication Auteurs : J. Achache, Auteur ; J. Aschbacher, Auteur ; S. Briggs, Auteur Année de publication : 2004 Article en page(s) : pp 29 - 35 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] Afrique (géographie politique)
[Termes IGN] développement durable
[Termes IGN] eau souterraine
[Termes IGN] hydrogéologie
[Termes IGN] image satellite
[Termes IGN] précipitation
[Termes IGN] ressources en eauRésumé : (Auteur) Water resources, the “blue gold” of the 21st century, can be successfuly minitored from space using Earth-observation technology. Satellite can measure precipitation, atmospheric water content, soil moisture, surface run-off, lake and river levels, groundwater reservoirs, as well as ice and snow cover. Improved sensors, better modelling and a deeper understanding of the underlying science have substantially advanced our knowledge of the global water cycle in recent years. However, there are still major shortcomings in both the understanding and the observation of key parameters. The estimation of groundwater resources, for example, poses a major challenge, as they are not directly visible from space. Indirect methods based on gravity-field measurements, interferometery and altimetric monitoring of rivers need to be applied to gain knowledge of reservoir volumes and flows. In order to improve our capabilities and to offert this technology to people in developing countries, ESA has launched a new programme focusing on the use of space technology for water-resource management in Africa. The initiative, called 'TIGER' is a direct followup engagement of ESA's strong engagement in the 2002 Johannesburg World Summit off Sustainable Development, and implements its recommendations through concrete actions. Numéro de notice : A2004-156 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26683
in ESA bulletin > n° 117 (February 2004) . - pp 29 - 35[article]
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Titre : Monitoring river and lake levels from space Type de document : Article/Communication Auteurs : J. Benveniste, Auteur ; P. Berry, Auteur Année de publication : 2004 Article en page(s) : pp 36 - 42 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] altimétrie par radar
[Termes IGN] analyse comparative
[Termes IGN] eau de surface
[Termes IGN] image Envisat-MERIS
[Termes IGN] inondation
[Termes IGN] lac
[Termes IGN] mission spatiale
[Termes IGN] niveau de l'eau
[Termes IGN] ressources en eau
[Termes IGN] rivièreRésumé : (Auteur) The growing concern about our planet's water resources, coupled with the economically driven decrease in ground-based gauge measurements, has focused attention on the possibility of using space-based data sets for remote measurements of river and lake heights. The most direct measurements of inland water heights are obtained from satellite altimeters, with long time series of such observations having been built up over the post decade. ESA has been developing new global river and lake monitoring products, including an expert processing system, with the help of De Montfort University (UK). A seven-year-long time series of samples was distributed to the hydrology community at the CNES Hydrology from Space Workshop in Toulouse last October in order to validate the user requirements. They responded very favorably and are now impatient to get their hands on a decade of global river-and lake-level products, as well as the latest near-real-time products coming from ESA's Envisat mission. Numéro de notice : A2004-157 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26684
in ESA bulletin > n° 117 (February 2004) . - pp 36 - 42[article]Precision farming today: role of high-resolution satellite sensors / G. Metternicht in GIM international, vol 18 n° 2 (February 2004)
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Titre : Precision farming today: role of high-resolution satellite sensors Type de document : Article/Communication Auteurs : G. Metternicht, Auteur Année de publication : 2004 Article en page(s) : pp 40 - 43 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] agriculture de précision
[Termes IGN] analyse comparative
[Termes IGN] capteur imageur
[Termes IGN] image à résolution métrique
[Termes IGN] image Ikonos
[Termes IGN] image ORBVIEW
[Termes IGN] image Quickbird
[Termes IGN] production agricoleRésumé : (Auteur) Precision farming is concerned with site-specific treatment of agricultural land. This approach is necessitated by crop production variability resulting from variability in soil and humidity conditions. Today site-specific treatment is enable by modern geo-information technology - GPS, GIS and remote sensing - and communication technology. Resulting action may include differentiation in ploughing depth and seed density, and the application of fertilisers at higher rates on areas of lower production. The first two of these may be based on information valid over a longer time-span. The latter - variable rate application - requires monitoring of crop conditions during the growing season. How can remotly sensed imagery support monitoring ? The author discusses the potential role of high-resolution satellite sensors - Ikonos, Quickbird and comming Orbview - in precision farming. Numéro de notice : A2004-016 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26544
in GIM international > vol 18 n° 2 (February 2004) . - pp 40 - 43[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 061-04021 RAB Revue Centre de documentation En réserve L003 Disponible Vegetation/SPOT: an operational mission for the Earth monitoring, presentation of new standard product / P. Maisongrande in International Journal of Remote Sensing IJRS, vol 25 n° 1 (January 2004)
PermalinkFirst images from Orbview-3: Orbimage now faces a brighter future / Gordon Petrie in Geoinformatics, vol 7 n° 1 (01/01/2004)
PermalinkHigh-resolution imaging from space: a world-wide survey (part 1 North America) / Gordon Petrie in Geoinformatics, vol 7 n° 1 (01/01/2004)
PermalinkPermalinkIntégrer une nouvelle génération [de satellites météorologiques] / E. Legrand in Atmosphériques, n° 21 (01/01/2004)
PermalinkGeometric processing of hyperspectral image data acquired by VIFIS on board light aircraft / Y. Gu in International Journal of Remote Sensing IJRS, vol 24 n° 23 (December 2003)
PermalinkADS40 Leica: une caméra numérique en pleine maturité: ISTAR : une société française au savoir-faire confirmé / N. Pisot in XYZ, n° 97 (décembre 2003 - février 2004)
PermalinkEvent-driven SAR data acquisition in urban areas using GIS / Uwe Sörgel in GIS Geo-Informations-Systeme, vol 2003 n° 12 (Dezember 2003)
PermalinkExtending satellite remote sensing to local scales: land and water resources monitoring using high-resolution imagery / K.E. Sawaya in Remote sensing of environment, vol 88 n° 1 (30/11/2003)
PermalinkIkonos satellite, imagery, and products / G. Dial in Remote sensing of environment, vol 88 n° 1 (30/11/2003)
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