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Mangrove research and coastal ecosystem studies with SPOT-4 HRVIR and TERRA ASTER in the Arabian Gulf / Hideo Saito in International Journal of Remote Sensing IJRS, vol 24 n° 21 (November 2003)  

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 24 n° 21 (November 2003) . - pp 4073 - 4092 Titre : Mangrove research and coastal ecosystem studies with SPOT-4 HRVIR and TERRA ASTER in the Arabian Gulf Type de document : Article/Communication Auteurs : Hideo Saito, Auteur ; M.F. Bellan, Auteur ; A. Al-Habshi, Auteur ; et al., Auteur Année de publication : 2003 Article en page(s) : pp 4073 - 4092 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] Abou Dabi [Termes IGN] cartographie thématique [Termes IGN] classification par maximum de vraisemblance [Termes IGN] détection de changement [Termes IGN] Doubaï [Termes IGN] écosystème [Termes IGN] Emirats Arabes Unis [Termes IGN] image SPOT-HRVIR [Termes IGN] image Terra-ASTER [Termes IGN] littoral [Termes IGN] mangrove [Termes IGN] Persique, golfe [Termes IGN] surveillance écologique [Termes IGN] zone tropicale humide Résumé : (Auteur) Mangroves reach their optimal development in the wet tropics although some little known mangrove stands are reported in subtropical arid coastlines especially from the Red Sea to Pakistan where they form one of the driest mangrove habitats in the world. Because they constitute the only available evergreen forest in hyperarid warm coastal areas, the main wetlands for migratory birds and essential nursery ground for many species of fish, it Is imperative to produce a sufficiently accurate map for monitoring their changes and for their protection. The main objective of the present work is to test and to select the best methodological approach to discriminate and map the mangroves and related coastal ecosystems in the United Arab Emirates (UAE). between Abu Dhabi and Dubai, a coastal stretch about 750km long. It was found that the best practical results were produced by the Maximum Likelihood and Mahalanobis classifications although some limitations remain unsolved, especially in open ecosystems, which are common in arid areas. Moreover, SPOT4 HighResolution Visible InfraRed (HRVIR) data proves at least as efficient as TERRA ASTER data, in spite of a slightly finer ground resolution and the great number of channels for ASTER. Ultimately, the most appropriate working scale for mapping coastal habitats, compatible with pixel size, is in the order of 1/25 000. Numéro de notice : A2003-302 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/0143116021000035030 En ligne : https://doi.org/10.1080/0143116021000035030 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22598 [article]

Exemplaires(1)

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080-03211	RAB	Revue	Centre de documentation	En réserve L003	Exclu du prêt

Spectral reflectance characterization of shallow lakes from the Brazilian pantanal wetlands with field and airborne hyperspectral data / L.S. Galvao in International Journal of Remote Sensing IJRS, vol 24 n° 21 (November 2003)  

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 24 n° 21 (November 2003) . - pp 4093 - 4112 Titre : Spectral reflectance characterization of shallow lakes from the Brazilian pantanal wetlands with field and airborne hyperspectral data Type de document : Article/Communication Auteurs : L.S. Galvao, Auteur ; W. Pereira Filho, Auteur ; M.M. Abdon, Auteur ; et al., Auteur Année de publication : 2003 Article en page(s) : pp 4093 - 4112 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] analyse en composantes principales [Termes IGN] Brésil [Termes IGN] hydrographie de surface [Termes IGN] image aérienne [Termes IGN] image AVIRIS [Termes IGN] image hyperspectrale [Termes IGN] lac [Termes IGN] réflectance spectrale [Termes IGN] sédiment [Termes IGN] zone humide Résumé : (Auteur) The relationships between field water reflectance spectra and physicochemical data of seven freshwater and five saltwater lakes from the Brazilian Pantanal wetlands were characterized. Selection of the lakes was based on previous inspection of the Airborne Visible/infrared Imaging Spectrometer (AVIRIS) images. Principal component analysis (PCA) was used to identify homogeneous groups of lakes, in which the regression relationships were evaluated. The continuum removal method was applied to characterize minor spectral variations in the depth of the absorption bands present in field and image spectra. The results showed lakes with very distinct spectral characteristics. The transition from the freshwater to the saltwater lakes was characterized by lower values of depth and Secchi depth, larger concentrations of dissolved organic carbon (DOC), total suspended sediments (TSS), calcium (Ca), magnesium (Mg), sodium (Na) and potassium (K), and higher values of pH and electrical conductivity. The saline lakes presented a higher overall reflectance in the 400900 nm range than the freshwater lakes, as indicated by the first principal component. From the optically active constituents analysed, DOC better explained variations in water reflectance. The discrimination of the saltwater lakes along the second principal component was due to the decrease in the chlorophyll (Chl) and to the increase in the DOC concentrations from the greenish to the bluish saline lakes. The AVIRIS instrument was able to detect the narrow 630 nm absorption band present in field water reflectance spectra. Numéro de notice : A2003-303 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/0143116031000070382 En ligne : https://doi.org/10.1080/0143116031000070382 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22599 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
080-03211	RAB	Revue	Centre de documentation	En réserve L003	Exclu du prêt

Study of urban spatial patterns from SPOT panchromatic imagery using textural analysis / Qian Zhang in International Journal of Remote Sensing IJRS, vol 24 n° 21 (November 2003)  

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 24 n° 21 (November 2003) . - pp 4137 - 4160 Titre : Study of urban spatial patterns from SPOT panchromatic imagery using textural analysis Type de document : Article/Communication Auteurs : Qian Zhang, Auteur ; Jing Wang, Auteur ; P. Gong, Auteur ; et al., Auteur Année de publication : 2003 Article en page(s) : pp 4137 - 4160 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] analyse texturale [Termes IGN] classification dirigée [Termes IGN] image à haute résolution [Termes IGN] image panchromatique [Termes IGN] image SPOT-HRG [Termes IGN] niveau de gris (image) [Termes IGN] Pékin (Chine) [Termes IGN] texture d'image [Termes IGN] urbanisation Résumé : (Auteur) The long-time historical evolution and recent rapid development of' BeiJing, China, present before us a unique urban structure. A 10-metre spatial resolution SPOT panchromatic image of Beijing has been studied to capture the spatial patterns of the city. Supervised image classifications were performed Using statistical and structural texture features produced from the image. Textural features, including eight texture features from the Grey-Level Cooccurrence Matrix (GI-CM) method ; a computationally efficient texture feature, the Number of Different Grey-levels (NDG), and a structural texture feature, Edge Density (ED), were evaluated. It was found that generally single texture features performed poorly. Classification accuracy increased with increasing number of texture features until three or four texture features were combined. The more texture features in the combination, the smaller difference between different combinations. The results also show that a lower number of texture features were needed for more homogeneous areas. NDG and ED combined with GLCM texture features produced similar results as the same number of GLCM texture features. Two classification schemes were adopted, stratified classification and non-stratified classification. The best stratified classification result was better than the best non-stratified classification result. Numéro de notice : A2003-304 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/0143116031000070445 En ligne : https://doi.org/10.1080/0143116031000070445 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22600 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
080-03211	RAB	Revue	Centre de documentation	En réserve L003	Exclu du prêt

Improvements in land use mapping for irrigated agriculture from satellite sensor data using a multi-stage maximum likelihood classification / I.A. El-Magd in International Journal of Remote Sensing IJRS, vol 24 n° 21 (November 2003)  

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 24 n° 21 (November 2003) . - pp 4197 - 4206 Titre : Improvements in land use mapping for irrigated agriculture from satellite sensor data using a multi-stage maximum likelihood classification Type de document : Article/Communication Auteurs : I.A. El-Magd, Auteur ; T.W. Tanton, Auteur Année de publication : 2003 Article en page(s) : pp 4197 - 4206 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] carte agricole [Termes IGN] carte d'occupation du sol [Termes IGN] classification par maximum de vraisemblance [Termes IGN] cultures [Termes IGN] cultures irriguées [Termes IGN] image Landsat-ETM+ [Termes IGN] rizière [Termes IGN] utilisation du sol Résumé : (Auteur) The accuracy of conventional land use classification of irrigated agriculture from optical satellite images using maximum likelihood supervised classification was compared with a classification based on multistage maxinium likelihood supervised classification. In the multistage maximum likelihood classification series of sub-classifications were carried out which included masking and/or omitting certain crops from the classifications. These series of classifications improved the identification of individual crops/land use types. The output from the optimum sub-classifications were stacked to give an overall crop types/land use map. When the multistage classification was tested against a single stage classification on a large irrigation scheme in Central Asia the final accuracy of crop/land use classification increased from 85% to 94%. Field verification confirmed the accuracy at 93.5%. These results were achieved with a single Landsat 7 Enhanced Thematic Mapper (ETM+) sensor dataset as of 2 August 1999 over an area of 38.5 km. Numéro de notice : A2003-305 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/0143116031000139791 En ligne : https://doi.org/10.1080/0143116031000139791 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22601 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
080-03211	RAB	Revue	Centre de documentation	En réserve L003	Exclu du prêt

Towards an operational system for regional-scale rice yield estimation using a time-series of Radarsat ScanSAR images / Y. Li in International Journal of Remote Sensing IJRS, vol 24 n° 21 (November 2003)  

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 24 n° 21 (November 2003) . - pp 4207 - 4220 Titre : Towards an operational system for regional-scale rice yield estimation using a time-series of Radarsat ScanSAR images Type de document : Article/Communication Auteurs : Y. Li, Auteur ; Q. Liao, Auteur ; X. Li, Auteur ; et al., Auteur Année de publication : 2003 Article en page(s) : pp 4207 - 4220 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] Chine [Termes IGN] cultures [Termes IGN] image Radarsat [Termes IGN] Oryza (genre) [Termes IGN] production agricole [Termes IGN] rendement agricole [Termes IGN] surveillance agricole Résumé : (Auteur) This paper demonstrates that Radarsat ScanSAR data can be an important data source of' radar remote sensing for monitoring crop systems and estimation of rice yield in large areas in tropical and sub-tropical regions. Experiments were carried out to show the effectiveness of Radarsat ScanSAR data for rice yield estimation in the whole province of Guangdong, South China. A methodology was developed to deal with a series of issues in extracting rice information from the ScanSAR data, such as topographic influences, levels of agro-management, irregular distribution of paddy fields and different rice cropping systems. A model was provided for rice yield estimation based on the relationship between the backscatter coefficient of multi-temporal SAR data and the biomass of rice. The study indicates that the whole procedure can become a low-cost and convenient operational system for large-scale rice yield estimation which is difficult for conventional methods. Numéro de notice : A2003-306 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/0143116031000095970 En ligne : https://doi.org/10.1080/0143116031000095970 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22602 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
080-03211	RAB	Revue	Centre de documentation	En réserve L003	Exclu du prêt