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Ocean colour analysis in coastal waters by airborne sensors / G. Zibordi in International Journal of Remote Sensing IJRS, vol 11 n° 5 (May 1990)  

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 11 n° 5 (May 1990) . - pp 705 - 725 Titre : Ocean colour analysis in coastal waters by airborne sensors Type de document : Article/Communication Auteurs : G. Zibordi, Auteur ; G. Maracci, Auteur ; P. Schlittenhardt, Auteur Année de publication : 1990 Article en page(s) : pp 705 - 725 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] Adriatique, mer [Termes IGN] capteur aérien [Termes IGN] chlorophylle [Termes IGN] couleur de l'océan [Termes IGN] eaux côtières [Termes IGN] image multibande [Termes IGN] radiométrie Résumé : (Auteur) A methodology for ocean colour analysis in coastal zones through airborne sensors is introduced and applied to multispectral data gathered at different altitude over test sites in the Northern Adriatic Sea. Data obtained by the Ocean Color Radiometer (working in the same bands of the Coastal Zone Color Scanner) and the Six Channel Radiometer (working in the spectral region characterized by natural fluorescence of chlorophyll) have been corrected for atmospheric and sea-surface effects by modelling radiative processes involved in remote sensing of water colour. Water radiance spectra and chlorophyll and sediment concentrations, derived from remotely sensed data corrected for atmospheric and sea-surface effects, demonstrate the capabilities of the methodology in performing quantitative analysis of materials suspended or dissolved in sea water. Numéro de notice : A1990-084 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431169008955052 En ligne : https://doi.org/10.1080/01431169008955052 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=25501 [article]

Exemplaires(1)

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A ratio vegetation index adjusted for soil brightness / D.J. Major in International Journal of Remote Sensing IJRS, vol 11 n° 5 (May 1990)  

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 11 n° 5 (May 1990) . - pp 727 - 740 Titre : A ratio vegetation index adjusted for soil brightness Type de document : Article/Communication Auteurs : D.J. Major, Auteur ; F. Baret, Auteur ; Gérard Guyot, Auteur Année de publication : 1990 Article en page(s) : pp 727 - 740 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] couleur du sol [Termes IGN] humidité du sol [Termes IGN] indice de végétation [Termes IGN] luminance lumineuse [Termes IGN] rayonnement proche infrarouge [Termes IGN] réflectance du sol Résumé : (Auteur) Improved parameters for a soil-adjusted vegetation index (SAVI) are derived using SAIL model output for simulated wheat canopy reflectance. The SAVI is much less sensitive than the ratio vegetation index to changes in background caused by soil colour or surface soil moisture content. The parameters are developed to minimize variability due to soil brightness over the practical range of solar elevations, leaf angle distributions (LAD) and leaf area indices (LAI). The parameters are added to the near-infrared (NIR) and red reflectances before calculating the NIR/red ratio. Three new versions of the SAVI are developed based on the theoretical consideration of the effects of wet and dry soils. All three are superior to the NIR/red ratio, the perpendicular vegetation index and a soil-adjusted vegetation index. Our simplest version requires the addition of a parameter to the red reflectance. The second and third versions require an iterative procedure to find the best parameters that are then added to the red or the NIR and red reflectances. In general, SAVI adjustment parameters required to remove soil-brightness effects decrease as factors that obscure the soil-surface increase. Low solar elevation and high LAI result in increasingly negative values for the parameters. The NIR/red ratio is the vegetation index least influenced by soil brightness at LAI greater than three. Our iterated versions have lowest overall errors but are occasionally subject to higher errors at the combination of low zenith angles and erectophile canopies. The SAVI based on the bare soil reflectance performs best on field data. Numéro de notice : A1990-085 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431169008955053 En ligne : https://doi.org/10.1080/01431169008955053 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=25502 [article]

Exemplaires(1)

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Meteosat-based evapotranspiration and thermal inertia mapping for monitoring transgression in the Lake Chad region and Niger delta / A. Rosema in International Journal of Remote Sensing IJRS, vol 11 n° 5 (May 1990)  

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 11 n° 5 (May 1990) . - pp 741 - 752 Titre : Meteosat-based evapotranspiration and thermal inertia mapping for monitoring transgression in the Lake Chad region and Niger delta Type de document : Article/Communication Auteurs : A. Rosema, Auteur ; J.L. Fiselier, Auteur Année de publication : 1990 Article en page(s) : pp 741 - 752 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] bande visible [Termes IGN] évapotranspiration [Termes IGN] image Météosat [Termes IGN] inertie thermique [Termes IGN] marais [Termes IGN] Niger (delta intérieur du) [Termes IGN] rayonnement infrarouge thermique [Termes IGN] Sahel [Termes IGN] surveillance météorologique [Termes IGN] Tchad, lac Résumé : (Auteur) This paper reports the application of deriving evapotranspiration and thermal inertia from thermal and visible infrared Meteosat data to Sahelian wetlands: the Niger Delta in Mali and the Logone/Chari/Chad system in Chad. Numéro de notice : A1990-086 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431169008955054 En ligne : https://doi.org/10.1080/01431169008955054 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=25503 [article]

Exemplaires(1)

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Atmospheric water vapour over oceans from SSM-I measurements / P. Schluessel in International Journal of Remote Sensing IJRS, vol 11 n° 5 (May 1990)  

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 11 n° 5 (May 1990) . - pp 753 - 766 Titre : Atmospheric water vapour over oceans from SSM-I measurements Type de document : Article/Communication Auteurs : P. Schluessel, Auteur ; W.J. Emery, Auteur Année de publication : 1990 Article en page(s) : pp 753 - 766 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] image DMSP-SSM/I [Termes IGN] océan [Termes IGN] radiosondage [Termes IGN] rayonnement électromagnétique [Termes IGN] teneur en vapeur d'eau [Termes IGN] vapeur d'eau Résumé : (Auteur) The Special Sensor Microwave/Imager (SSM/I) flying on the most recent satellite of the Defense Meteorological Satellite Program (DMSP) measures radiation from the Earth-atmosphere system within millimetre wavelengths. This radiation is strongly modified by the varying atmospheric water-vapour content. A technique to derive the water-vapour content over oceans from these measurements is developed. The sensor system is studied theoretically by calculating the radiative transfer for a non-scattering atmosphere in the appropriate spectral channels for a large set of atmospheric/oceanic situations. Subsequently, statistical retrieval coefficients are derived via a regression analysis of the synthetic measure-ments. Approaches using one to three spectral channels enable us to derive water vapour amounts in vertical columns with accuracies from 0-145 to 0-17g/cm2. A case study with real SSM/I data demonstrates the capability of the system to derive atmospheric water-vapour fields over the global ocean within a period of a few days. The accuracy evaluated is confirmed through globally distributed match-ups with radiosonde measurements. Numéro de notice : A1990-087 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431169008955055 En ligne : https://doi.org/10.1080/01431169008955055 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=25504 [article]

Exemplaires(1)

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Observations of flow separation by an isolated island / P.A. Davies in International Journal of Remote Sensing IJRS, vol 11 n° 5 (May 1990)  

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 11 n° 5 (May 1990) . - pp 767 - 782 Titre : Observations of flow separation by an isolated island Type de document : Article/Communication Auteurs : P.A. Davies, Auteur ; L.A. Mofor, Auteur Année de publication : 1990 Article en page(s) : pp 767 - 782 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] Ecosse [Termes IGN] écoulement des eaux [Termes IGN] estuaire [Termes IGN] île [Termes IGN] océan [Termes IGN] photo-interprétation [Termes IGN] stratification [Termes IGN] viscosité Résumé : (Auteur) Remotely-sensed data from a series of overflights of the Clyde estuary in western Scotland are described. Thermal band images are presented to demonstrate the occurrence of flow separation at the tip of an isolated island in the estuary and the characteristics of the resulting downstream eddy are investigated. Field data are used to interpret the observed eddy structure and to confirm that the eddy is delineated in the images because of the existence of a source tracer of cold water upstream of the point at which the tidal stream separates from the tip of the island. Upwelling of cold water induced by the rotational motion of the attached eddy is shown to be inhibited by the stable density stratification existing in the estuary under summer conditions. The dynamics of the eddies generated at the island are discussed in terms of the non-dimensional parameters controlling the flow and it is demonstrated that the effects of the background rotation of the Earth upon the flow dynamics are weak. The usefulness of the so-called equivalent Reynolds number and the island wake parameter in describing estuarine flows is discussed and it is shown that the spatial structures of the observed eddies suggest a horizontal eddy viscosity for the flow of about 102m2s-1, which is of the same order as the values adopted by other workers for similar cases. Numéro de notice : A1990-088 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431169008955056 En ligne : https://doi.org/10.1080/01431169008955056 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=25505 [article]

Exemplaires(1)

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Determination of surface reflectance and estimates of atmospheric optical depth and single scattering albedo from Landsat Thematic Mapper data / J.E. Conel in International Journal of Remote Sensing IJRS, vol 11 n° 5 (May 1990)  

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 11 n° 5 (May 1990) . - pp 783 - 828 Titre : Determination of surface reflectance and estimates of atmospheric optical depth and single scattering albedo from Landsat Thematic Mapper data Type de document : Article/Communication Auteurs : J.E. Conel, Auteur Année de publication : 1990 Article en page(s) : pp 783 - 828 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s) [Termes IGN] albedo [Termes IGN] diffusion du rayonnement [Termes IGN] image Landsat-TM [Termes IGN] modèle atmosphérique [Termes IGN] propagation ionosphérique [Termes IGN] propagation troposphérique [Termes IGN] radiance [Termes IGN] réflectance [Termes IGN] simulation [Termes IGN] spectromètre [Termes IGN] traitement d'image [Termes IGN] transmittance [Termes IGN] Wyoming (Etats-Unis) Résumé : (Auteur) Ground reflectance data of selected targets for calibration of a Landsat Thematic Mapper (TM) image of Wind River Basin, Wyoming, acquired November 21, 1982, were analysed. The calibration lines, one for each band, are derived from linear regression analysis of scatter plots of ground bidirectional spectral reflectance versus the Thematic Mapper (TM) scanner response. The field-measured reflectances were obtained with a portable spectrometer at 10nm spectral resolution in November 1983. The empirical equations derived were used to predict the ground reflectance of five unknown targets scattered throughout the Wind River and adjacent Bighorn Basins. Subsequently, in July 1984, field measurements were made over these targets with field spectrometers and with a hand-held radiometer with filters matching those of the TM. The agreement between predicted and measured quantities, mostly within the uncertainties of the field observations, was obtained, suggesting that the ground reflectance properties of the areas studied were approximately the same in November 1982 and July 1984, and that, as suggested by visual inspection of the images themselves, the atmosphere during TM data acquisition was relatively homogeneous from place to place over the area of our field observations. In addition to determining ground reflectance, we also used these field-derived calibration relationships together with current radiometric calibration data for the TM in a simple homogeneous atmospheric model to estimate emergent radiance at the satellite. From the emergent radiance and the atmospheric model, we derived estimates, on a straightforward algebraic inversion scheme, of single scattering albedo (o>0) and optical depth (t) for the atmosphere. These relationships follow from the fact that the intercept value of a field calibration line, determined at zero surface reflectance, provides an estimate of the path radiance; the slope is a function of the two-way transmittance. To disentangle the atmospheric properties we assumed the atmosphere to be isotropically scattering. This is the only assumption that can be made considering the essentially single nadir-looking direction of TM surface observations. For this model the slope and intercept provide two functions of a>0 and t, whose numerical magnitudes together with the solar spectral irradiances are known. These equations were solved simultaneously, exactly in the single scattering approximation and iteratively with multiple scattering. Uncertainties in the derived quantities were estimated from the standard errors provided by the regression analysis. The results for optical depth variation with wavelength are 20 per cent greater than those predicted from the model of reference, a LOWTRAN 6 simulation of mid-latitude winter conditions. This led to consideration of sources of error in the analysis. All of these lead to overestimates of the optical depth, and include: (1) atmospheric scattering from the surroundings over the standard targets (adjacency effects), (2) contamination of surface targets by other components, e.g., ground by snow and snow by ground, vegetation, or shadows, and (3) the neglect of anisotropic scattering in the atmospheric model. Numéro de notice : A1990-089 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431169008955057 En ligne : https://doi.org/10.1080/01431169008955057 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=25506 [article]

Exemplaires(1)

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080-90051	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Effects of topography on radiance from upland vegetation in north Wales / A.G. Thomson in International Journal of Remote Sensing IJRS, vol 11 n° 5 (May 1990)  

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 11 n° 5 (May 1990) . - pp 829 - 840 Titre : Effects of topography on radiance from upland vegetation in north Wales Type de document : Article/Communication Auteurs : A.G. Thomson, Auteur ; C. Jones, Auteur Année de publication : 1990 Article en page(s) : pp 829 - 840 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] détail topographique [Termes IGN] flore locale [Termes IGN] Pays de Galles [Termes IGN] pente [Termes IGN] photosynthèse [Termes IGN] pixel [Termes IGN] prairie [Termes IGN] radiance [Termes IGN] Thematic Mapper Résumé : (Auteur) Radiance data from a Landsat 5 Thematic Mapper image were used to study terrain effects in 284 4 pixel by 4 pixel quadrats in upland North Wales. The three semi-natural vegetation types examined responded differently to variations in slope and aspect. Short-cropped Agrostis grassland was the most uniform type ; and it reflected radiation in a solar-orientated diffuse manner. Variations in radiance detected from two rougher vegetation types suggested environmentally induced heterogeneity within the vegetation cover, related to aspect (Nardus grassland) or slope (Calluna heathland). The difference between reflected red and green light is proposed as a crude measure of photosynthesis that can discriminate between broad vegetation categories in undulating terrain. Numéro de notice : A1990-090 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431169008955058 En ligne : https://doi.org/10.1080/01431169008955058 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=25507 [article]

Exemplaires(1)

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080-90051	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Thematic Mapper thermal infrared data in discriminating selected urban features / S.M. Leak in International Journal of Remote Sensing IJRS, vol 11 n° 5 (May 1990)  

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 11 n° 5 (May 1990) . - pp 841 - 857 Titre : Thematic Mapper thermal infrared data in discriminating selected urban features Type de document : Article/Communication Auteurs : S.M. Leak, Auteur ; G. Venugopal, Auteur Année de publication : 1990 Article en page(s) : pp 841 - 857 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] analyse discriminante [Termes IGN] Chicago (Illinois) [Termes IGN] image thermique [Termes IGN] image TM (aérienne) [Termes IGN] milieu urbain [Termes IGN] occupation du sol [Termes IGN] précision de la classification [Termes IGN] rayonnement infrarouge thermique Résumé : (Auteur) This research was conducted to assess the utility of Landsat Thematic Mapper thermal data (10-4 to 12-5um) for urban feature analysis. Seven band thematic mapper data collected on 25 October, 1982 for the Chicago metropolitan area were used to determine the relative importance of the thermal band as a component of an urban land use classification. Analysis consisted of: (1) the use of a transformed divergence measure (separability) to test the interclass spectral variability of selected features for different channel combinations and (2) a comparison of classification results, with and without thermal data using a supervised layered classification algorithm. The use of thermal data resulted in an overall 9-3 per cent increase in classification accuracy. Elimination of classes such as forest, asphalt and railroad resulted in an increase of 12-0 per cent in classification performance. Examination of the separability analysis and classification results indicated there were specific areas of success resulting from the use of thermal data. Increased classification accuracy occurred in several classes such as shadow (+ 36-7 per cent), residential (+ 41-1 per cent), active industry (+ 20-0 per cent) and commercial industrial fringe (+ 77-1 per cent). These results demonstrated that the information content of thermal data was valuable for urban area analysis. Numéro de notice : A1990-091 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431169008955059 En ligne : https://doi.org/10.1080/01431169008955059 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=25508 [article]

Exemplaires(1)

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Destriping multiple sensor imagery by improved histogram matching / M. Wegener in International Journal of Remote Sensing IJRS, vol 11 n° 5 (May 1990)  

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 11 n° 5 (May 1990) . - pp 859 - 875 Titre : Destriping multiple sensor imagery by improved histogram matching Type de document : Article/Communication Auteurs : M. Wegener, Auteur Année de publication : 1990 Article en page(s) : pp 859 - 875 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] appariement d'histogramme [Termes IGN] délignage [Termes IGN] image multi sources [Termes IGN] image satellite Résumé : (Auteur) Sensor stripes evident in multisensor imagery can cause subsequent image classification to fail, if not removed properly. Of the destriping algorithms investigated, the one published by Horn and Woodham seemed to be the most promising, although, due to an inherent conceptual flaw, it can produce unexpected results. The problem with the original algorithm of Horn and Woodham arises from the fact that under certain circumstances it is extremely sensitive to statistically insignificant differences in the image data recorded by the individual sensors. This problem can be overcome by acquiring image statistics from homogeneous sub-images only. Numéro de notice : A1990-092 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431169008955060 En ligne : https://doi.org/10.1080/01431169008955060 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=25509 [article]

Exemplaires(1)

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A shipborne AVHRR-HRPT receiving and image processing system for polar research / T. Viehoff in International Journal of Remote Sensing IJRS, vol 11 n° 5 (May 1990)  

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 11 n° 5 (May 1990) . - pp 877 - 886 Titre : A shipborne AVHRR-HRPT receiving and image processing system for polar research Type de document : Article/Communication Auteurs : T. Viehoff, Auteur Année de publication : 1990 Article en page(s) : pp 877 - 886 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] antenne [Termes IGN] banquise [Termes IGN] courant marin [Termes IGN] Groenland [Termes IGN] image NOAA-AVHRR [Termes IGN] navigation [Termes IGN] navire [Termes IGN] océanographie spatiale [Termes IGN] station Résumé : (Auteur) An Advanced Very High Resolution Radiometer-High Resolution Picture Transmission receiving station was installed onboard the research icebreaker RV Polarstern for navigation aid in ice covered polar regions and to support scientific programmes. The hardware and software configuration of the system is described in detail. First results obtained in the eastern Greenland Sea during a summer cruise in 1988 demonstrate the usefulness of the receiving station. The ship could be navigated effectively through the ice-covered East Greenland Current and some small scale ice eddies could be observed at the ice edge. Numéro de notice : A1990-093 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431169008955061 En ligne : https://doi.org/10.1080/01431169008955061 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=25510 [article]

Exemplaires(1)

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Technical note. Analysis of cloud imagery using box counting / A. Detwiler in International Journal of Remote Sensing IJRS, vol 11 n° 5 (May 1990)  

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 11 n° 5 (May 1990) . - pp 887 - 898 Titre : Technical note. Analysis of cloud imagery using box counting Type de document : Article/Communication Auteurs : A. Detwiler, Auteur Année de publication : 1990 Article en page(s) : pp 887 - 898 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques [Termes IGN] analyse texturale [Termes IGN] classification [Termes IGN] météorologie [Termes IGN] nuage [Termes IGN] objet fractal [Termes IGN] photographie [Termes IGN] Wyoming (Etats-Unis) Résumé : (Auteur) Photographic images of portions of an altocumulus cloud field were obtained from a rising balloon. They spanned a range of resolutions as the balloon rose. The fractal dimension of this field is estimated using a box-counting procedure. It is shown that the field is characterized by multiple fractal dimensions that vary with both intensity and scale. Numéro de notice : A1990-094 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431169008955062 En ligne : https://doi.org/10.1080/01431169008955062 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=25511 [article]

Exemplaires(1)

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A graphical approach for the evaluation of land cover classification procedures / G. Peng in International Journal of Remote Sensing IJRS, vol 11 n° 5 (May 1990)  

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 11 n° 5 (May 1990) . - pp 899 - 905 Titre : A graphical approach for the evaluation of land cover classification procedures Type de document : Article/Communication Auteurs : G. Peng, Auteur ; P.J. Howarth, Auteur Année de publication : 1990 Article en page(s) : pp 899 - 905 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique [Termes IGN] classification [Termes IGN] image SPOT-HRV [Termes IGN] occupation du sol [Termes IGN] pixel Résumé : (Auteur) A method for evaluating the effectiveness of different feature combinations and training strategies is described. Preliminary tests have been made using two groups of feature combinations derived from SPOT High Resolution Visible (HRV) data and two sets of training samples. The method is objective, and needs no ground confirmation or interaction from the image analyst. It is recommended as a surrogate for detailed accuracy assessment when attempting to find an optimum set of training pixels or feature combinations for image classification. Numéro de notice : A1990-095 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431169008955063 En ligne : https://doi.org/10.1080/01431169008955063 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=25512 [article]

Exemplaires(1)

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080-90051	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Initial analysis of Landsat TM data for elk habitat mapping / T.P. Huber in International Journal of Remote Sensing IJRS, vol 11 n° 5 (May 1990)  

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 11 n° 5 (May 1990) . - pp 907 - 912 Titre : Initial analysis of Landsat TM data for elk habitat mapping Type de document : Article/Communication Auteurs : T.P. Huber, Auteur ; K.E. Casler, Auteur Année de publication : 1990 Article en page(s) : pp 907 - 912 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] cartographie urbaine [Termes IGN] classification [Termes IGN] Colorado (Etats-Unis) [Termes IGN] habitat animal [Termes IGN] image Landsat-TM [Termes IGN] modèle numérique de surface [Termes IGN] précision Résumé : (Auteur) Preliminary classifiation of Landsat Thematic Mapper and digital elevation model (DEM) data are described for elk habitat mapping in the mountains of central Colorado, USA. This work used six different data manipulation sets for comparison and evaluation purposes. Classification of these data have relatively low accuracy rates but provide the basis upon which future, more accurate classifications will be undertaken. Numéro de notice : A1990-096 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431169008955064 En ligne : https://doi.org/10.1080/01431169008955064 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=25513 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
080-90051	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Estimating suspended sediment concentrations from spectral reflectance data / L. Nanu in International Journal of Remote Sensing IJRS, vol 11 n° 5 (May 1990)  

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 11 n° 5 (May 1990) . - pp 913 - 920 Titre : Estimating suspended sediment concentrations from spectral reflectance data Type de document : Article/Communication Auteurs : L. Nanu, Auteur ; C. Robertson, Auteur Année de publication : 1990 Article en page(s) : pp 913 - 920 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] eaux côtières [Termes IGN] particule [Termes IGN] réflectance spectrale [Termes IGN] sédiment [Termes IGN] turbidité des eaux Résumé : (Auteur) A method for estimating sediment concentrations at different depths in coastal waters from measured spectral reflectance above the sea is proposed. The water backscattering coefficient is obtained by integrating a scattering cross section derived from Mie theory over a Junge type particle-size distribution. The results for turbid water, near an arid coast, with vertical mixing, shows a maximum of particle concentration in the middle layer, while the same method applied to reflectance data for 'blue' water, gives a relative concentration of sediment that gradually increases with depth. Numéro de notice : A1990-097 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431169008955065 En ligne : https://doi.org/10.1080/01431169008955065 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=25514 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
080-90051	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Limitations to the identification of spatial structures from AVHRR data / A.S. Belward in International Journal of Remote Sensing IJRS, vol 11 n° 5 (May 1990)  

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 11 n° 5 (May 1990) . - pp 921 - 927 Titre : Limitations to the identification of spatial structures from AVHRR data Type de document : Article/Communication Auteurs : A.S. Belward, Auteur ; E. Lambin, Auteur Année de publication : 1990 Article en page(s) : pp 921 - 927 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] Advanced Very High Resolution Radiometer [Termes IGN] autocorrélation [Termes IGN] image satellite [Termes IGN] structure spatiale Résumé : (Auteur) Satellite sensor data with different resolution-cell sizes have been used to show how sensor-induced spatial autocorrelation in High Resolution Picture Transmission (HRPT) data, and local variance induced by sampling in Global Area Coverage (GAC) data, may limit the use of Advanced Very High Resolution Radiometer (AVHRR) data for the identification of spatial structure and pattern. Numéro de notice : A1990-098 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431169008955066 En ligne : https://doi.org/10.1080/01431169008955066 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=25515 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
080-90051	RAB	Revue	Centre de documentation	En réserve L003	Disponible