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A 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)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 57 n° 5-6 (April - May 2003) . - pp 304 - 314 Titre : A comparative analysis of scanned maps and imagery for mapping applications Type de document : Article/Communication Auteurs : Costas Armenakis, Auteur ; F. Leduc, Auteur ; I. Cyr, Auteur ; F. Savopol, Auteur ; François Cavayas, Auteur Année de publication : 2003 Article en page(s) : pp 304 - 314 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Cartographie numérique [Termes IGN] analyse comparative [Termes IGN] analyse d'image numérique [Termes IGN] analyse diachronique [Termes IGN] analyse en composantes principales [Termes IGN] analyse texturale [Termes IGN] Canada [Termes IGN] carte numérisée [Termes IGN] carte topographique [Termes IGN] cartographie automatique [Termes IGN] classification [Termes IGN] détection de changement [Termes IGN] détection de contours [Termes IGN] données maillées [Termes IGN] extraction automatique [Termes IGN] fusion d'images [Termes IGN] image Landsat [Termes IGN] image Landsat-ETM+ [Termes IGN] lac [Termes IGN] Normalized Difference Vegetation Index [Termes IGN] objet géographique zonal [Termes IGN] seuillage d'image Résumé : (Auteur) In mapping organizations, the implementation of more automation coupled with the availability of heterogeneous data requires the investigation, adaptation and evaluation of new approaches and techniques. The demand for rapid mapping operations such as database generation and updating is continuously increasing. Due to the rising use of raster data, image analysis techniques have been investigated and tested in this study to introduce automation in the assessment of scanned topographic monochrome maps and Landsat 7 ETM+ imagery for feature separation and extraction in northern Canada. The work focuses on the detection and extraction of lakes predominant features in the North as well as on to their spatiotemporal comparison. Various approaches using digital image processing techniques were implemented and evaluated. Thresholding and texture measures were used to evaluate the potential of rapid extraction of certain topographic elements from scanned monochrome maps of northern Canada. A raster to vector approach (R> V) followed for the vectorization of these extracted features. The extraction of features from Landsat 7 ETM+ imagery involved image and theme enhancement by applying various image fusion and spectral transformations (e.g., Brovey, PC1IMGFUSE, intensity hue saturation (IHS), principal component analysis (PCA), Tasseled Cap, Normalized Difference Vegetation Index (NDVI)), followed by image classification and thresholding. Tests showed that the approaches were more or less featuredependent, while, at the same time, they can augment and significantly enhance the conventional topographic mapping methods. Following the analysis of the map and image data, change detection between two lake datasets was performed both interactively and in an automated mode based on the nonintersection of old and new features. The various approaches and methodology developed and implemented within a GIS environment along with examples, results and limitations are presented and discussed. Copyright ISPRS Numéro de notice : A2003-062 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/S0924-2716(02)00160-0 En ligne : https://doi.org/10.1016/S0924-2716(02)00160-0 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22358 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
081-03021	RAB	Revue	Centre de documentation	En réserve L003	Disponible
081-03022	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Spatial database updating using active contours for multispectral images: application with Landsat 7 / S. Jodouin in ISPRS Journal of photogrammetry and remote sensing, vol 57 n° 5-6 (April - May 2003)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 57 n° 5-6 (April - May 2003) . - pp 346 - 355 Titre : Spatial database updating using active contours for multispectral images: application with Landsat 7 Type de document : Article/Communication Auteurs : S. Jodouin, Auteur ; L. Bentabet, Auteur ; D. Ziou, Auteur ; J. Vaillancourt, Auteur ; Costas Armenakis, Auteur Année de publication : 2003 Article en page(s) : pp 346 - 355 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées [Termes IGN] base de données topographiques [Termes IGN] contour [Termes IGN] détection de contours [Termes IGN] dévers [Termes IGN] données spatiotemporelles [Termes IGN] image Landsat [Termes IGN] image multibande [Termes IGN] mise à jour de base de données [Termes IGN] segmentation d'image Résumé : (Auteur) This paper presents a fully automated approach for area detection and delineation based on multispectral images and features from a topographic database. The vectors residing in the database are refined using active contours (snakes) according to updated information provided by the multispectral images. The conventional methods of defining the external energy guiding the deformation of the snake based on: (1) statistical measures; or (2) gradientbased boundary finding is often corrupted by poor image quality. Here a method to integrate the two approaches is proposed using an estimation of the maximum a posteriori (MAP) segmentation in an effort to form a unified approach that is robust to noise and poor edges. We further propose to improve the accuracy of the resulting boundary location and update of the snake topology. A number of experiments are performed on both synthetic and LANDSAT 7 images to evaluate the approach. Copyright ISPRS Numéro de notice : A2003-063 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/S0924-2716(02)00163-6 En ligne : https://doi.org/10.1016/S0924-2716(02)00163-6 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22359 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
081-03021	RAB	Revue	Centre de documentation	En réserve L003	Disponible
081-03022	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Mapping from ASTER stereo image data: DEM validation and accuracy assessment / A. Hirano in ISPRS Journal of photogrammetry and remote sensing, vol 57 n° 5-6 (April - May 2003)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 57 n° 5-6 (April - May 2003) . - pp 356 - 370 Titre : Mapping from ASTER stereo image data: DEM validation and accuracy assessment Type de document : Article/Communication Auteurs : A. Hirano, Auteur ; R. Welch, Auteur ; H. Lang, Auteur Année de publication : 2003 Article en page(s) : pp 356 - 370 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique [Termes IGN] Advanced Spaceborne Thermal Emission and Reflection Radiometer [Termes IGN] appariement d'images [Termes IGN] corrélation automatique de points homologues [Termes IGN] erreur moyenne quadratique [Termes IGN] image Terra-ASTER [Termes IGN] modèle numérique de surface [Termes IGN] précision décamétrique [Termes IGN] traitement d'image Résumé : (Auteur) The Advanced Spacebome Thermal Emission and Reflection Radiometer (ASTER) onboard the National Aeronautics and Space Administration's (NASA's) Terra spacecraft provides alongtrack digital stereo image data at 15m resolution. As part of ASTER digital elevation model (DEM) accuracy evaluation efforts by the US/Japan ASTER Science Team, stereo image data for four study sites around the world have been employed to validate prelaunch estimates of heighting accuracy. Automated stereocorrelation procedures were implemented using the Desktop Mapping System (DMS) software on a personal computer to derive DEMs with 30-to 150m postings. Results indicate that a rootmeansquare error (RMSE) in elevation between + 7 and + 15 m can be achieved with ASTER stereo image data of good quality. An evaluation of an ASTER DEM data product produced at the US Geological Survey (USGS) EROS Data Center (EDC) yielded an RMSE of + 8.6 m. Overall, the ability to extract elevations from ASTER stereopairs using stereocorrelation techniques meets expectations. Copyright ISPRS Numéro de notice : A2003-064 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/S0924-2716(02)00164-8 En ligne : https://doi.org/10.1016/S0924-2716(02)00164-8 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22360 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
081-03021	RAB	Revue	Centre de documentation	En réserve L003	Disponible
081-03022	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Interactive maps for visual exploration of grid and vector geodata / Gennady Andrienko in ISPRS Journal of photogrammetry and remote sensing, vol 57 n° 5-6 (April - May 2003)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 57 n° 5-6 (April - May 2003) . - pp 380 - 389 Titre : Interactive maps for visual exploration of grid and vector geodata Type de document : Article/Communication Auteurs : Gennady Andrienko, Auteur ; Natalia Andrienko, Auteur ; V. Gitis, Auteur Année de publication : 2003 Article en page(s) : pp 380 - 389 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] analyse spatiale [Termes IGN] carte interactive [Termes IGN] cartographie thématique [Termes IGN] classification [Termes IGN] dommage matériel [Termes IGN] données localisées [Termes IGN] données maillées [Termes IGN] données vectorielles [Termes IGN] image à haute résolution [Termes IGN] séisme [Termes IGN] sylviculture [Termes IGN] système d'information géographique [Termes IGN] toile d'araignée mondiale [Termes IGN] visualisation cartographique [Vedettes matières IGN] Géovisualisation Résumé : (Auteur) This article considers two types of tools used for the analysis of spatial data: computational tools for grid data and visualizationbased interactive exploratory techniques. The main purpose is to demonstrate that computational and visual techniques are complementary, and their combined use in data analysis may produce a synergistic effect. To this end, we describe two example scenarios of data analysis in the evaluation of potential damage from earthquakes and in analysis of forest resources. The analyses were performed with the use of CommonGIS, featuring the availability of powerful geocomputational tools and interactive visualizationrelated facilities that can be efficiently used in combination in a desktop environment or via the World Wide Web. Copyright ISPRS Numéro de notice : A2003-065 Affiliation des auteurs : non IGN Thématique : FORET/GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/S0924-2716(02)00166-1 En ligne : https://doi.org/10.1016/S0924-2716(02)00166-1 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22361 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
081-03021	RAB	Revue	Centre de documentation	En réserve L003	Disponible
081-03022	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Geovisualization illustrated / Menno-Jan Kraak in ISPRS Journal of photogrammetry and remote sensing, vol 57 n° 5-6 (April - May 2003)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 57 n° 5-6 (April - May 2003) . - pp 390 - 399 Titre : Geovisualization illustrated Type de document : Article/Communication Auteurs : Menno-Jan Kraak, Auteur Année de publication : 2003 Article en page(s) : pp 390 - 399 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Cartographie numérique [Termes IGN] carte ancienne [Termes IGN] carte interactive [Termes IGN] cartographie dynamique [Termes IGN] cartographie par internet [Termes IGN] données localisées dynamiques [Termes IGN] histoire [Termes IGN] visualisation cartographique [Termes IGN] visualisation dynamique Résumé : (Auteur) In recent years, the visualization of geospatial data has undergone dramatic and important developments. Next to static maps, nowadays, immersive and highly interactive virtual environments can be used to explore and present dynamic geospatial data. Additionally, the World Wide Web has developed into a prominent medium to disseminate geospatial data and maps. In visualizing geospatial data, methods and techniques from fields, such as scientific visualization and information visualization, are applied because of the large volumes of data at hand. This has accumulated in what is known as geovisualization the use of visual geospatial displays to explore data and through that exploration to generate hypotheses, develop problem solutions and construct knowledge. Maps and other linked graphics play a key role in this process. The objective of this paper is to demonstrate the usefulness of geovisualization and, in particular, how alternative graphic representations can stimulate the visual thought process. This is demonstrated by applying geovisualization techniques to Minard's wellknown map of Napoleon's 1812 campaign into Russia, the "Carte figurative des pertes successives en hommes de I'Armée Française dans la campagne de Russie 1812-1813" (http://www.itc.nFpersonal/kraak/1812/). Copyright ISPRS Numéro de notice : A2003-066 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/S0924-2716(02)00167-3 En ligne : https://doi.org/10.1016/S0924-2716(02)00167-3 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22362 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
081-03021	RAB	Revue	Centre de documentation	En réserve L003	Disponible
081-03022	RAB	Revue	Centre de documentation	En réserve L003	Disponible