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Evaluation of land use and cover changes in North Shaanxi, China / W. Wu in Photo interprétation, vol 39 n° 2 (Juin 2003)
[article]
Titre : Evaluation of land use and cover changes in North Shaanxi, China Type de document : Article/Communication Auteurs : W. Wu, Auteur Année de publication : 2003 Article en page(s) : pp 15 - 29 Langues : Anglais (eng) Français (fre) Descripteur : [Vedettes matières IGN] Photo-interprétation
[Termes IGN] analyse diachronique
[Termes IGN] Chensi (Chine)
[Termes IGN] classification
[Termes IGN] désertification
[Termes IGN] environnement
[Termes IGN] géographie humaine
[Termes IGN] image Landsat-TM
[Termes IGN] image multitemporelle
[Termes IGN] occupation du sol
[Termes IGN] surface cultivéeRésumé : (Auteur) As a transitional belt between the Mu Us Sandy Land and Loess Plateau, the north part of Shaanxi is one of the ecologically vulnerable and areas in northwest China, which are subject to the impacts of both natural factors and human activity. It is therefore of special importance to select such an area to carry out an intensive land use change study and establish a dynamic monitoring system thereof aiming at understanding the change mechanism, human-environmental relationships and producing useful references for the central and local governments in their sustainable land use planning.
Multitemporal Landsat images were used for change detection by adopting a synthetic method including atmospheric correction, Tasseled Cap transformation, indicator differencing, thresholding, change type identification and county-level quantification. A classification on the recent image was conducted to quantify the present land use and cover pattern. A panel analysis calibrated by multivariate regression model was applied to reveal the driving forces of land cover changes and understand the interaction between the human activities and environment modifications by incorporating the results obtained from the change detection with the county-level socio-economic data. The regression modelling results suggest that the vegetation degradation- the predominant change type in the study area, is probably related to the soil erosion (R' = 0.994) and grassland degradation; the farmland extension, occurring principally in the valleys in the Yulin County, is associated with the foodproduct increase (R' = 0.987); the urban extension, spatially related to coal mining, is linked to the urban population growth (R' = 0. 881); and the surface decrease of waterbodies, having taken place in the sandy land, is negatively correlated to the cultivated land change (R' = 0. 562). Therefore, the factors which govern these land use and cover changes are various human socio-economic activities, and the root cause of land degradation is, however, some unreasonable land use policies.Numéro de notice : A2003-392 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26472
in Photo interprétation > vol 39 n° 2 (Juin 2003) . - pp 15 - 29[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 104-03021 RAB Revue Centre de documentation En réserve L003 Disponible Fusion of spectral and shape features for identification of urban surface cover types using reflective and thermal hyperspectral data / Karl Segl in ISPRS Journal of photogrammetry and remote sensing, vol 58 n° 1-2 (June - December 2003)
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[article]
Titre : Fusion of spectral and shape features for identification of urban surface cover types using reflective and thermal hyperspectral data Type de document : Article/Communication Auteurs : Karl Segl, Auteur ; S. Roessner, Auteur ; U. Heiden, Auteur ; H. Kaufmann, Auteur Année de publication : 2003 Article en page(s) : pp 99 - 112 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] analyse linéaire des mélanges spectraux
[Termes IGN] biotope
[Termes IGN] carte d'occupation du sol
[Termes IGN] fusion d'images
[Termes IGN] image DAIS
[Termes IGN] image hyperspectrale
[Termes IGN] image thermique
[Termes IGN] milieu urbain
[Termes IGN] morphologie mathématique
[Termes IGN] photo-interprétation assistée par ordinateur
[Termes IGN] pixel
[Termes IGN] reconnaissance de formes
[Termes IGN] réflectance
[Termes IGN] utilisation du solRésumé : (Auteur) The urban environment is characterized by an intense multifunctional use of available spaces, where the preservation of open green spaces is of special importance. For this purpose, areawide urban biotope mapping based on CIR aerial photographs has been carried out for the large cities in Germany during the last 10 years. Because of dynamic urban development and high mapping costs, the municipal authorities are interested in effective methods for mapping urban surface cover types, which can be used for evaluation of ecological conditions in urban structures and supporting updates of biotope maps. Against this background, airborne hyperspectral remote sensing data of the DAIS 7915 instrument have been analyzed for a test site in the city of Dresden (Germany) with regard to their potential for automated materialoriented identification of urban surface cover types. Previous investigations have shown that the high spectral and spatial variabilities of these data require the development of special methods, which are capable of dealing with the resulting mixedpixel problem in its specific characteristics in urban areas. Earlier, methodological developments led to an approach based on a combination of spectral classification and pixeloriented unmixing techniques to facilitate sensible endmember selection based on the reflective bands of the DAIS instrument. This approach is now extended by a shapebased classification technique including the thermal bands of the DAIS instrument to improve the detection of buildings during the process of identifying seedling pixels, which represent the starting points for linear spectral unmixing. This new approach increases the reliability of differentiation between buildings and open spaces, leading to more accurate results for the spatial distribution of surface cover types. Thus, the new approach significantly enhances the exploitation of the information potential of the hyperspectral DAIS 7915 data for an areawide identification of urban surface cover types. Copyright ISPRS Numéro de notice : A2003-088 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/S0924-2716(03)00020-0 En ligne : https://doi.org/10.1016/S0924-2716(03)00020-0 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22384
in ISPRS Journal of photogrammetry and remote sensing > vol 58 n° 1-2 (June - December 2003) . - pp 99 - 112[article]Exemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 081-03032 RAB Revue Centre de documentation En réserve L003 Disponible 081-03031 RAB Revue Centre de documentation En réserve L003 Disponible Multipath mitigation: how good can it get with new signals ? / L.R. Weill in GPS world, vol 14 n° 6 (June 2003)
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Titre : Multipath mitigation: how good can it get with new signals ? Type de document : Article/Communication Auteurs : L.R. Weill, Auteur Année de publication : 2003 Article en page(s) : pp 106 - 106 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] bruit blanc
[Termes IGN] classification par maximum de vraisemblance
[Termes IGN] code GPS
[Termes IGN] correction du signal
[Termes IGN] densité spectrale de puissance
[Termes IGN] signal GPS
[Termes IGN] trajet multipleRésumé : (Auteur) Answer: The winner of the 1971 Nobel Prize for Physics. The question? Who defined the most important signal parameter for controlling GPS multipath? The British/Hungarian physicist Dennis Gabor won the prize for the invention of holography. However, Gabor was also one of a handful of mathematicians and scientists who developed communication theory during the 1940s. Communication theory, also called information theory, is the branch of mathematics that deals with the efficient and accurate transmission of information-bearing signals from one place to another. Key to the theory is the concept of signal bandwidth. Now bandwidth can be defined in a number of different ways, but the particular bandwidth named after Cabor determines, in part, how accurately a GPS receiver can measure pseudorange or carrier phase in the presence of multipath. The Gabor bandwidth is determined by the particular shape of the signal's power spectral density function, and the larger the bandwidth the more resistant is the signal to multipath. The GPS receiver must have a processor that takes advantage of this resistance to provide measurements with minimal multipath contamination. Here, Dr Lawrence Weill outlines an implementation of a multipath mitigation algorithm based on the statistical theory of maximum likelihood and describes its expected performance with the new GPS signals soon to be available - signals characterized by a higher Cabor bandwidth than those currently transmitted. Numéro de notice : A2003-424 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26504
in GPS world > vol 14 n° 6 (June 2003) . - pp 106 - 106[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 067-03061 RAB Revue Centre de documentation En réserve L003 Disponible Processing Hyperion and ALI for forest classification / D.G. Goodenough in IEEE Transactions on geoscience and remote sensing, vol 41 n° 6 (June 2003)
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Titre : Processing Hyperion and ALI for forest classification Type de document : Article/Communication Auteurs : D.G. Goodenough, Auteur ; A. Dyk, Auteur ; K.O. Niemann, Auteur ; et al., Auteur Année de publication : 2003 Article en page(s) : pp 1321 - 1337 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] analyse comparative
[Termes IGN] Canada
[Termes IGN] classification dirigée
[Termes IGN] correction d'image
[Termes IGN] Etats-Unis
[Termes IGN] forêt
[Termes IGN] image EO1-ALI
[Termes IGN] image EO1-Hyperion
[Termes IGN] image hyperspectrale
[Termes IGN] image Landsat-ETM+
[Termes IGN] image multibande
[Termes IGN] Pinophyta
[Termes IGN] Pinus contorta
[Termes IGN] Pseudotsuga menziesii
[Termes IGN] Thuja plicataRésumé : (Auteur) Hyperion (a hyperspectral sensor) and the Advanced Land Imager (ALI) (a multispectral sensor) are carried on the National Aeronautics and Space Administration's Earth Observing 1 (EO-1) satellite. The Evaluation and Validation of EO-1 for substainable Development (EVEOSD) is our project supporting the EO-1 mission. With 10% of the world's forests and the second country by area in the world, Canada has a natural requirement for effective monitoring of its forests. Eight test sites have been selected for EVEOSD, with seven in Canada and one United States. Extensive fieldwork has been conducted at four of these sites. A comparison is made of forest classification from Hyperion, ALI, and the Enhanced Thematic Mapper (ETM+) of Landsat-7 for the Greater Victoria Watershed. The data have been radiometrically corrected and orthorectified. Feature selection and statistical transforms are used to reduce the Hyperion feature space from 198 channels to 11 features. Classes chosen for discrimination included Douglasfir, hemlock, western, redcedar, lodgepole pine, and red alder. Overall classification accuracies obtained for each sensor were Hyperion 90.0 %, ALI 84.8% and ETM+ 75.0%. Hyperspectral remote sensing provides significant advantages and greater accuracies over ETM+ for forest discrimination. The EO-1 sensors, Hyperion and ALI, provide data with excellent discrimination for Pacific Northwest in comparison to Landsat-7 ETM+. Numéro de notice : A2003-216 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2003.813214 En ligne : https://doi.org/10.1109/TGRS.2003.813214 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22512
in IEEE Transactions on geoscience and remote sensing > vol 41 n° 6 (June 2003) . - pp 1321 - 1337[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 065-03061 RAB Revue Centre de documentation En réserve L003 Disponible Satellite multi-sensor data analysis of urban surface temperatures and Landcover / B. Dousset in ISPRS Journal of photogrammetry and remote sensing, vol 58 n° 1-2 (June - December 2003)
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Titre : Satellite multi-sensor data analysis of urban surface temperatures and Landcover Type de document : Article/Communication Auteurs : B. Dousset, Auteur ; Françoise Gourmelon, Auteur Année de publication : 2003 Article en page(s) : pp 43 - 54 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] classification dirigée
[Termes IGN] fusion d'images
[Termes IGN] image multibande
[Termes IGN] image multicapteur
[Termes IGN] image SPOT-HRV
[Termes IGN] image thermique
[Termes IGN] Los Angeles
[Termes IGN] métropole
[Termes IGN] microclimat
[Termes IGN] milieu urbain
[Termes IGN] Normalized Difference Vegetation Index
[Termes IGN] occupation du sol
[Termes IGN] ozone
[Termes IGN] Paris (75)
[Termes IGN] SPOT Image
[Termes IGN] télédétection spatiale
[Termes IGN] température de surfaceRésumé : (Auteur) Multiple satellite sensors are used to analyze physical processes that determine energy fluxes and their interaction at the urban surface. The study is based on summertime microclimate analyses of the Los Angeles and Paris metropolises. The method consists of deriving some parameters governing the surface heat fluxes, constructing statistics of thermal infrared images, and using a GIS to combine them with a landcover classification from SPOTHRV multispectral images, and with data from intensive insitu experiments. The average images reveal spatial and temporal variations of land surface temperature (LST), and distinct microclimatic patterns. The combined interpretation of the statistics images and of the landcover classification shows: (i) the effect of surface physical properties, especially in downtown business and industrial districts that display heatislands larger than 7°C; (ii) the temperating influence of water; (iii) the negative correlation between afternoon land surface temperature and normalized vegetation index, which confirms the cooling effect of urban parks; (iv) the correlation between variations of surface temperature and ozone concentration at diurnal and longer time scales. Copyright ISPRS Numéro de notice : A2003-086 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/S0924-2716(03)00016-9 En ligne : https://doi.org/10.1016/S0924-2716(03)00016-9 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22382
in ISPRS Journal of photogrammetry and remote sensing > vol 58 n° 1-2 (June - December 2003) . - pp 43 - 54[article]Exemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 081-03032 RAB Revue Centre de documentation En réserve L003 Disponible 081-03031 RAB Revue Centre de documentation En réserve L003 Disponible Comparison of gray-level reduction and different texture spectrum encoding methods for land-use classification using a panchromatic Ikonos image / B. Xu in Photogrammetric Engineering & Remote Sensing, PERS, vol 69 n° 5 (May 2003)
PermalinkHyperspectral texture recognition using a multiscale opponent representation / M. Shi in IEEE Transactions on geoscience and remote sensing, vol 41 n° 5 (May 2003)
PermalinkImage calibration to like-values in mapping shallow water quality from multitemporal data / M.A.. Islam in Photogrammetric Engineering & Remote Sensing, PERS, vol 69 n° 5 (May 2003)
PermalinkModelling error propagation in vector-based buffer analysis / Wei Shi in International journal of geographical information science IJGIS, vol 17 n° 3 (may 2003)
PermalinkQuantitative assessment of a haze suppression methodology for satellite imagery: effect on land cover classification performance / Y. Zhang in IEEE Transactions on geoscience and remote sensing, vol 41 n° 5 (May 2003)
PermalinkRough and fuzzy geographical data integration / K. Oukbir in International journal of geographical information science IJGIS, vol 17 n° 3 (may 2003)
PermalinkPermalinkThe hierarchy of the cocoons of a graph and its application to image segmentation / Laurent Guigues in Pattern recognition letters, vol 24 n° 8 (May 2003)
PermalinkAn algorithm for mapping burnt areas in Australia using SPOT-Vegetation data / D. Stroppiana in IEEE Transactions on geoscience and remote sensing, vol 41 n° 4 (April 2003)
PermalinkA comparative analysis of scanned maps and imagery for mapping applications / Costas Armenakis in ISPRS Journal of photogrammetry and remote sensing, vol 57 n° 5-6 (April - May 2003)
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