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Separating the weeds from the trees / M. Norris-Rogers in GIM international, vol 21 n° 1 (January 2007)

Public [article]  inGIM international > vol 21 n° 1 (January 2007) . - pp 18 - 19 Titre : Separating the weeds from the trees Type de document : Article/Communication Auteurs : M. Norris-Rogers, Auteur ; P. Coppin, Auteur Année de publication : 2007 Article en page(s) : pp 18 - 19 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] analyse texturale [Termes IGN] classification dirigée [Termes IGN] herbe [Termes IGN] image à haute résolution [Termes IGN] image Ikonos [Termes IGN] image Quickbird [Termes IGN] surveillance agricole [Termes IGN] surveillance forestière Résumé : (Auteur) Weed infestation in young stands can severely affect tree growth, reducing volume production and decreasing seedling survival. In South African plantation conditions the first eighteen months are crucial. The authors developed a weed-control monitoring method based on combining textural analysis and spectral classification applied to high-resolution satellite imagery. Copyright Reed Business Information Numéro de notice : A2007-008 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28374 [article]

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3D physical versus empirical models for HR sensor orientation and elevation extraction: examples with Ikonos and Quickbird / Thierry Toutin in Revue Française de Photogrammétrie et de Télédétection, n° 184 (Décembre 2006)  

Public [article]  inRevue Française de Photogrammétrie et de Télédétection > n° 184 (Décembre 2006) . - pp 115 - 120 Titre : 3D physical versus empirical models for HR sensor orientation and elevation extraction: examples with Ikonos and Quickbird Type de document : Article/Communication Auteurs : Thierry Toutin, Auteur ; P. Schauer, Auteur Année de publication : 2006 Conférence : ISPRS 2006, Commission 1 Symposium, From sensors to imagery 03/07/2006 06/07/2006 Champs-sur-Marne [Paris Marne-la-Vallée] France OA ISPRS Archives Article en page(s) : pp 115 - 120 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique [Termes IGN] altitude [Termes IGN] analyse comparative [Termes IGN] compensation par moindres carrés [Termes IGN] données lidar [Termes IGN] image Ikonos [Termes IGN] image Quickbird [Termes IGN] modèle numérique de surface [Termes IGN] modèle par fonctions rationnelles [Termes IGN] orientation du capteur [Termes IGN] point d'appui Résumé : (Auteur) Elevations for digital surface model (DSM) generation were extracted from different stereo high-resolution (HR) images (QuickBird and Ikonos) using 3D physical and empirical geometric models. The 3D physical model is Toutin's model (TM) developed at the Canada Centre for Remote Sensing, and the empirical model is the rational function model (RFM). First, Vendor-supplied RFMs refined with polynomial functions and TM were compared for the sensor orientations with least-squares adjustments with different number of ground control points (GCPs). TM and RFMs gave similar results with Ikonos as soon as RFM was refined with a shift computed from at least one GCP. On the other hand, TM gave better results than RFMs with QuickBird regardless of the number of GCPs. Due to relief dependency, QuickBird RFM needed to be refined at least with linear functions computed from at least 6-10 GCPs. Some large errors were, however, noted on forward image RFM in column. The stereo-extracted elevations of DSMs were then compared to 0.2-m accurate Lidar elevation data. Because DSM stereo-extracted elevations included the height of land covers (trees, houses), elevation linear errors with 68 percent confidence level (LE68) were computed for the entire area and three land-cover classes (forested, urban/residential, bare surface). TM and RFMs with Ikonos, regardless of the method and GCP number, achieved comparable results for all classes while TM achieved overall better results than RFMs with QuickBird. All results demonstrated the necessity of refining Ikonos RFM with a tri-directional shift and at least one GCP but QuickBird RFM with 1st order linear functions and 6-10 GCPs. Copyright SFPT Numéro de notice : A2006-642 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueNat DOI : sans En ligne : https://www.isprs.org/proceedings/XXXVI/part1/Papers/PS1-06.pdf Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28365 [article]

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Comparison of DEM generation and combination methods using high resolution optical stereo imagery and interferometric SAR data / D. Hoja in Revue Française de Photogrammétrie et de Télédétection, n° 184 (Décembre 2006)  

Public [article]  inRevue Française de Photogrammétrie et de Télédétection > n° 184 (Décembre 2006) . - pp 89 - 94 Titre : Comparison of DEM generation and combination methods using high resolution optical stereo imagery and interferometric SAR data Type de document : Article/Communication Auteurs : D. Hoja, Auteur ; Peter Reinartz, Auteur ; Manfred Schroeder, Auteur Année de publication : 2006 Conférence : ISPRS 2006, Commission 1 Symposium, From sensors to imagery 03/07/2006 06/07/2006 Champs-sur-Marne [Paris Marne-la-Vallée] France OA ISPRS Archives Article en page(s) : pp 89 - 94 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique [Termes IGN] analyse comparative [Termes IGN] Barcelone [Termes IGN] Bavière (Allemagne) [Termes IGN] couple stéréoscopique [Termes IGN] fusion de données multisource [Termes IGN] image à résolution métrique [Termes IGN] image ERS [Termes IGN] image Ikonos [Termes IGN] image optique [Termes IGN] image radar moirée [Termes IGN] image SPOT 5 [Termes IGN] modèle numérique de surface Résumé : (Auteur) Digital elevation models (DEM) from satellite data are generated mainly from two types of datasets using completely different methods: photogrammetry for optical stereo images (e.g. SPOT5, IKONOS) and interferometry for Synthetic Aperture Radar data (InSAR, e.g. ERS-Tandem, SRTM). Both generation methods show advantages and disadvantages but have similar accuracy values in comparison to a reference DEM. The paper aims at showing the potential for combined usage of several DSM (derived with different sensors and methods) to improve the overall accuracy. Some results are given for DEM fusion utilizing height error maps for each DSM and for DEM integration, where single point information from another DSM is inserted during the triangulation process. The quality of the DSM derived from one source and of the combined DSM depends on the steepness of the terrain and on the land cover type. For flat terrain or moderate hilly landscapes, a height accuracy in the order of 5 meters or better can be achieved for the mentioned sensors. Two test areas are chosen, where many different data sets are available and much knowledge exists from previous studies. The first test area is a region in the south-eastern part of Bavaria comprising a mostly hilly, post-glacial landscape including lakes and also mountains of the German Alps. The second test area is located in Catalonia, Spain, and includes the city of Barcelona as well as a mostly hilly terrain with some steep slopes and additionally the Mediterranean coast. The received DSM are compared qualitatively and quantitatively to the reference DEM with superior quality by looking at profiles and sub-area statistics. The results show that an improvement of the fused DSM and the integrated DSM can be quantitatively measured. Although the overall statistics for a larger region does show only a slight improvement, local errors can be reduced significantly so that the overall accuracy of the combined DSM is higher. Copyright SFPT Numéro de notice : A2006-641 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans En ligne : https://www.isprs.org/proceedings/XXXVI/part1/Papers/T07-29.pdf Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28364 [article]

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Lineament analysis through remote sensing as a contribution to the identification of caves in western Lebanon / A. Shaban in Photo interprétation, vol 42 n° 4 (Décembre 2006)

Public [article]  inPhoto interprétation > vol 42 n° 4 (Décembre 2006) . - pp 47 - 55 Titre : Lineament analysis through remote sensing as a contribution to the identification of caves in western Lebanon Type de document : Article/Communication Auteurs : A. Shaban, Auteur ; M. Khawlie, Auteur Année de publication : 2006 Article en page(s) : pp 47 - 55 Note générale : Bibliographie Langues : Français (fre) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] analyse comparative [Termes IGN] carte géologique [Termes IGN] fracturation [Termes IGN] géomorphométrie [Termes IGN] grotte [Termes IGN] image Ikonos [Termes IGN] image IRS [Termes IGN] image Landsat-ETM+ [Termes IGN] image Quickbird [Termes IGN] karst [Termes IGN] Liban [Termes IGN] linéament Résumé : (Auteur) The carbonate terrain in Lebanon is dominated by cave structures as a reflection of the development of karstic features. The existing caves are known as a source for groundwater, as well as heritage and tourist sites. They have been given attention by water authorities and several scientific clubs and organizations. Yet, in the field there is no easily followed approach for their discovery. A large number of these caves have been identified by speleologists who spent long time and efforts to recognize their localities. This study aims to find out a systematic approach to discover new cave sites in Lebanon. In this respect, remote sensing, as a new and advanced information technique would be helpful in identifying surface karstic features. However, due to the relatively small-size of the cave openings, their allocation directly from satellite images is difficult. Therefore, this study aims to find out a relationship between the sites of existing caves and any terrain character that can help identify the sites of the unknown caves. Main among of these characters are the karstic and fracture systems, in which the later is basically observed on satellite images as linear features (the so-called lineaments). It is a comparative analysis between three components for easier study of the terrain. In the study Landsat ETM+ images merged with IRS-1 were used to produce the lineaments map. The morphometric analysis of lineament elements in Western Lebanon, and more certainly the intersection of linear features of different lengths indicate a percentage of 79% of coincidence with the sites of existing caves. The idea is to use the intersection of lineaments as possible indicator for cave citing that can be easily followed. The study reveals an encouraging pattern that can be further developed using remote sensing for easier terrain analysis. Copyright Editions Eska Numéro de notice : A2006-601 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28324 [article]

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Mapping with orbview-3 images: information content of high-resolution satellite images / Hyseyin Topan in GIM international, vol 20 n° 12 (December 2006)

Public [article]  inGIM international > vol 20 n° 12 (December 2006) . - pp 14 - 17 Titre : Mapping with orbview-3 images: information content of high-resolution satellite images Type de document : Article/Communication Auteurs : Hyseyin Topan, Auteur ; G. Buyuksalih, Auteur ; Karsten Jacobsen, Auteur Année de publication : 2006 Article en page(s) : pp 14 - 17 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Cartographie numérique [Termes IGN] 1:10.000 [Termes IGN] analyse comparative [Termes IGN] carte topographique [Termes IGN] image à résolution métrique [Termes IGN] image Ikonos [Termes IGN] image ORBVIEW [Termes IGN] limite de résolution radiométrique [Termes IGN] Turquie Résumé : (Auteur) The information content of OrbView-3 and Ikonos imagery is compared, using the Zonguldak area in Turkey as test area. Although OrbView-3 images are qualitatively slightly inferior to Ikonos panchromatic scenes, they can be used for the generation of topographic maps at scale 1:10,000. However, they are not suited for 1:5,000 mapping, for which scale Ikonos images also show limitations. Copyright Reed Business Information Numéro de notice : A2006-483 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28207 [article]

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Pros and cons of the orientation of very high resolution optical space images / Karsten Jacobsen in Revue Française de Photogrammétrie et de Télédétection, n° 184 (Décembre 2006)  

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Mapping salt-marsh vegetation by multispectral and hyperspectral remote sensing / E. Belluco in Remote sensing of environment, vol 105 n° 1 (15/11/2006)  

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Detection of forest decline using Ikonos sensor for cork oak (Quercus suber l.) woods in south Spain / F. Cano in Geocarto international, vol 21 n° 3 (September - November 2006)  

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Resolution dependent errors in remote sensing of cultivated areas / M. Ozdogan in Remote sensing of environment, vol 103 n° 2 (30/07/2006)  

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Artificial neural networks for mapping regional-scale upland vegetation from high spatial resolution imagery / H. Mills in International Journal of Remote Sensing IJRS, vol 27 n° 11 (June 2006)  

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Localized soft classification for super-resolution mapping of the shoreline / Aidy M. Muslim in International Journal of Remote Sensing IJRS, vol 27 n° 11 (June 2006)  

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A new intensity-hue-saturation fusion approach to image fusion with a tradeoff parameter / M. Choi in IEEE Transactions on geoscience and remote sensing, vol 44 n° 6 (June 2006)  

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Subpixel analysis of Landsat ETM/sup +/ using self-organizing map (SOM) neural networks for urban land cover characterization / S. Lee in IEEE Transactions on geoscience and remote sensing, vol 44 n° 6 (June 2006)  

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Comparison of 3D physical and empirical models for generating DSMs from stereo HR images / Thierry Toutin in Photogrammetric Engineering & Remote Sensing, PERS, vol 72 n° 5 (May 2006)  

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Multi-image matching for DSM generation from Ikonos imagery / Li Zhang in ISPRS Journal of photogrammetry and remote sensing, vol 60 n° 3 (May 2006)  

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