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Land-surface segmentation as a method to create strata for spatial sampling and its potential for digital soil mapping / L. Drăguț in International journal of geographical information science IJGIS, vol 30 n° 7- 8 (July - August 2016)
[article]
Titre : Land-surface segmentation as a method to create strata for spatial sampling and its potential for digital soil mapping Type de document : Article/Communication Auteurs : L. Drăguț, Auteur ; A. Dornik, Auteur Année de publication : 2016 Article en page(s) : pp 1359 - 1376 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques
[Termes IGN] analyse d'image numérique
[Termes IGN] analyse d'image orientée objet
[Termes IGN] analyse de groupement
[Termes IGN] cartographie numérique
[Termes IGN] échantillonnage de données
[Termes IGN] modèle numérique de surface
[Termes IGN] validation des donnéesRésumé : (Auteur) Sampling efforts are constrained by limited availability of resources. Therefore, methods to reduce the number of samples, while still achieving reasonable accuracy are needed. Land-surface segmentation (LSS) has proven a powerful technique to partition digital elevation models (DEMs) and their derivatives into relatively homogeneous areas, which can be further employed as support in soil sampling. Though topography is one of the main soil forming factors, a robust assessment of the potential of this technique to digital soil mapping (DSM) is still missing. In this study, we aimed at evaluating the potential of LSS in stratifying a landscape into relatively homogeneous areas, which can be used as strata for guiding the selection of sampling points in DSM. The experiments were carried out in two study areas where soil samples were available. Land-surface derivatives were derived from DEMs and segmented with a tool based on the multiresolution segmentation algorithm, into objects considered as homogeneous soil-landscape divisions. Thus, one sample was randomly selected within each segment from the existing sample data, based on which predictions of soil classes/sub-orders and properties, i.e. soil texture and A-horizon thickness, were made. Results were compared with predictions based on simple random sampling (SRS) and conditioned Latin hypercube (cLHS). The segmentation-based sampling (SBS) scheme performed better than SRS and cLHS schemes in predicting the A-horizon thickness, soil texture fractions and soil classes, showing a high potential of LSS in stratifying a landscape for the purposes of DSM. The novelty of this study is in the way strata are constructed, rather than in the sampling design itself. Further research is needed to demonstrate the value of a SBS design for practical use. The analyses presented here further highlight the importance of considering locally adaptive techniques in optimization of sampling schemes and predictions of soil properties. Numéro de notice : A2016-307 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/13658816.2015.1131828 En ligne : http://dx.doi.org/10.1080/13658816.2015.1131828 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=80906
in International journal of geographical information science IJGIS > vol 30 n° 7- 8 (July - August 2016) . - pp 1359 - 1376[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 079-2016042 RAB Revue Centre de documentation En réserve L003 Disponible 079-2016041 RAB Revue Centre de documentation En réserve L003 Disponible A web-based 3D visualisation and assessment system for urban precinct scenario modelling / Roman Trubka in ISPRS Journal of photogrammetry and remote sensing, vol 117 (July 2016)
[article]
Titre : A web-based 3D visualisation and assessment system for urban precinct scenario modelling Type de document : Article/Communication Auteurs : Roman Trubka, Auteur ; Stephen Glackin, Auteur ; Oliver Lade, Auteur ; Christopher Pettit, Auteur Année de publication : 2016 Article en page(s) : pp 175 – 186 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques
[Termes IGN] aide à la décision
[Termes IGN] conception orientée objet
[Termes IGN] géomatique web
[Termes IGN] géovisualisation
[Termes IGN] méthode agile
[Termes IGN] milieu urbain
[Termes IGN] planification urbaine
[Termes IGN] service web géographique
[Termes IGN] visualisation 3DRésumé : (auteur) Recent years have seen an increasing number of spatial tools and technologies for enabling better decision-making in the urban environment. They have largely arisen because of the need for cities to be more efficiently planned to accommodate growing populations while mitigating urban sprawl, and also because of innovations in rendering data in 3D being well suited for visualising the urban built environment. In this paper we review a number of systems that are better known and more commonly used in the field of urban planning. We then introduce Envision Scenario Planner (ESP), a web-based 3D precinct geodesign, visualisation and assessment tool, developed using Agile and Co-design methods. We provide a comprehensive account of the tool, beginning with a discussion of its design and development process and concluding with an example use case and a discussion of the lessons learned in its development. Numéro de notice : A2016-580 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2015.12.003 En ligne : http://dx.doi.org/10.1016/j.isprsjprs.2015.12.003 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=81719
in ISPRS Journal of photogrammetry and remote sensing > vol 117 (July 2016) . - pp 175 – 186[article]Conception de modèles 3D précis pour un suivi 4D optimisé des ouvrages hydrauliques linéaires : intérêt et particularité du drone / Vincent Tournadre in La Houille Blanche, revue internationale de l'eau, vol 2016 n° 3 (juin 2016)
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Titre : Conception de modèles 3D précis pour un suivi 4D optimisé des ouvrages hydrauliques linéaires : intérêt et particularité du drone Titre original : Accurate 3D models for a 4D monitoring of linear hydraulic structures: opportunities and characteristics of UAV Type de document : Article/Communication Auteurs : Vincent Tournadre , Auteur ; Jacques Beilin , Auteur ; Marc Pierrot-Deseilligny , Auteur ; Paul-Henri Faure, Auteur Année de publication : 2016 Article en page(s) : pp 33 - 38 Note générale : bibliographie Langues : Français (fre) Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques
[Termes IGN] auscultation d'ouvrage
[Termes IGN] code source libre
[Termes IGN] contrôle métrologique
[Termes IGN] digue
[Termes IGN] données spatiotemporelles
[Termes IGN] drone
[Termes IGN] image captée par drone
[Termes IGN] logiciel libre
[Termes IGN] métrologie géodésique
[Termes IGN] métrologie tridimensionnelle
[Termes IGN] modèle 3D du site
[Termes IGN] objet géographique linéaire
[Termes IGN] photogrammétrie aérienne
[Termes IGN] photogrammétrie métrologiqueRésumé : (auteur) Confronted with the ageing of its dikes and with the sometimes degraded conditions of access, the Compagnie Nationale du Rhône, the 2nd producer of hydro electricity in France, wishes to develop new systems of auscultation complementary to the sensors and visual inspections already deployed. The developments of drones, photographic sensors and algorithms of automatic calculations of 3D modelling from multi-stereoscopic images allow today to obtain the fine geometry of linear works via 3D models. At present, with a network of point to the dense ground, the reachable precision is of the order of 5 cm. In order to achieve the desired specifications (± 1 cm ± 3 cm) while minimizing the number of points on the ground, and thus the time field, CNR and the National Institute of Geographic and Forest Information (IGN) have established a partnership resulting in the completion of a research thesis on metrology by light airborne photogrammetry applied to the monitoring of developments dikes. The paper attempts to present the context of the project through the description of the current monitoring of embankments and of the new needs in auscultation of CNR. The following, based on a case study on the dike of the Palière is introducing advanced photogrammetric methods to mid 2015 to reach centimeter details with only 1 setting point ground for every 100 meters. Located at the interface of the world of Drones, of Research in photogrammetric algorithms and of concessionaires needs, the project will lead to the end of 2015 to an enhanced testing system allowing centimeter monitoring of sensitive embankments areas. The new photogrammetric algorithms written in an open source environment will be open to the entire scientific community and solved problems (high precision geo measures on linear structures) will be used by other distributors on other works with the same geometry. Numéro de notice : A2016--194 Affiliation des auteurs : ENSG+Ext (2012-2019) Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueNat DOI : 10.1051/lhb/2016028 Date de publication en ligne : 19/07/2016 En ligne : https://doi.org/10.1051/lhb/2016028 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=91848
in La Houille Blanche, revue internationale de l'eau > vol 2016 n° 3 (juin 2016) . - pp 33 - 38[article]Generation of highly accurate digital elevation models with unmanned aerial vehicles / Yuriy Reshetyuk in Photogrammetric record, vol 31 n° 154 (June - August 2016)
[article]
Titre : Generation of highly accurate digital elevation models with unmanned aerial vehicles Type de document : Article/Communication Auteurs : Yuriy Reshetyuk, Auteur ; Stig-Göran Mårtensson, Auteur Année de publication : 2016 Article en page(s) : pp 143-165 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques
[Termes IGN] acquisition de données
[Termes IGN] Agisoft Photoscan
[Termes IGN] altimétrie
[Termes IGN] drone
[Termes IGN] incertitude de mesurage
[Termes IGN] logiciel de photogrammétrie
[Termes IGN] modèle numérique de surfaceRésumé : (auteur) In order to investigate the possibilities for the generation of digital elevation models with a height uncertainty of 20 mm or less using unmanned aerial vehicles, a survey with a fixed-wing aircraft was carried out over a gravel quarry in Gävle, Sweden. At flying heights of about 80 and 160 m, the resulting imagery had ground sample distances of 24 and 50 mm, respectively. The data was processed in two different software suites – computer-vision-based PhotoScan and photogrammetric RapidStation/RapidTerrain. The results show that PhotoScan was more effective in flat terrain, with height uncertainties of 10 and 17 mm compared with 30 to 40 mm for RapidTerrain, whereas the latter had a clear advantage over undulating terrain. Numéro de notice : A2016-466 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/phor.12143 Date de publication en ligne : 17/06/2016 En ligne : https://doi.org/10.1111/phor.12143 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=81471
in Photogrammetric record > vol 31 n° 154 (June - August 2016) . - pp 143-165[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 106-2016021 RAB Revue Centre de documentation En réserve L003 Disponible Monitoring of a laboratory-scale inland-delta formation using a structured-light system / Devrim Akca in Photogrammetric record, vol 31 n° 154 (June - August 2016)
[article]
Titre : Monitoring of a laboratory-scale inland-delta formation using a structured-light system Type de document : Article/Communication Auteurs : Devrim Akca, Auteur ; Hansjörg Seybold, Auteur Année de publication : 2016 Article en page(s) : pp 121 - 142 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques
[Termes IGN] analyse comparative
[Termes IGN] analyse diachronique
[Termes IGN] Botswana
[Termes IGN] données spatiotemporelles
[Termes IGN] érosion hydrique
[Termes IGN] géomorphologie
[Termes IGN] modèle numérique de terrain
[Termes IGN] pente
[Termes IGN] sédimentation
[Termes IGN] surveillance géologiqueRésumé : (auteur) A reduced complexity model, which simulates the process of fluvial inland-delta formation, has been developed in a previous study. The results have been compared and validated with a laboratory experiment. This work elaborates the laboratory investigation in which an experimental inland delta is generated and its eroding topography is measured using a structured-light 3D scanner. The least squares 3D (LS3D) co-registration and comparison method is used for alignment as well as for comparing data epochs both spatially and temporally. A spatial precision value of around ±50 μm (1/20 000) is achieved. A series of high-quality digital elevation models (DEMs) are generated and the space-time evolution of the inland delta is monitored and analysed, in terms of slope and topography dynamics, in the consecutive DEM layers. The combination of high-resolution scanning together with high-precision co-registration techniques allows investigation of the details of the space-time variability of the sedimentation-deposition patterns to be used for geomorphological analysis. Numéro de notice : A2016-465 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/phor.12149 Date de publication en ligne : 17/06/2016 En ligne : https://doi.org/10.1111/phor.12149 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=81470
in Photogrammetric record > vol 31 n° 154 (June - August 2016) . - pp 121 - 142[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 106-2016021 RAB Revue Centre de documentation En réserve L003 Disponible Relationship between landform classification and vegetation (case study: southwest of Fars province, Iran) / Marzieh Mokarram in Open geosciences, vol 8 n° 1 (January - July 2016)PermalinkThe variants of an LOD of a 3D building model and their influence on spatial analyses / Filip Biljecki in ISPRS Journal of photogrammetry and remote sensing, vol 116 (June 2016)PermalinkAn improved ANUDEM method combining topographic correction and DEM interpolation / Xianwei Zheng in Geocarto international, vol 31 n° 5 - 6 (May - June 2016)PermalinkATLAS: A three-layered approach to facade parsing / Markus Mathias in International journal of computer vision, vol 118 n° 1 (May 2016)PermalinkEffect of sensor modelling methods on computation of 3-D coordinates from Cartosat-1 stereo data / Mritunjay Kumar Singh in Geocarto international, vol 31 n° 5 - 6 (May - June 2016)PermalinkHybrid terrain rendering based on the external edge primitive / E.G. Paredes in International journal of geographical information science IJGIS, vol 30 n° 5-6 (May - June 2016)PermalinkInformation from imagery: ISPRS scientific vision and research agenda / Jun Chen in ISPRS Journal of photogrammetry and remote sensing, vol 115 (May 2016)PermalinkLearning grammars for architecture-specific facade parsing / Raghudeep Gadde in International journal of computer vision, vol 117 n° 3 (May 2016)PermalinkAugmented survey reality : a surveying firm in Western Australia is exploring the extents of the known Holoverse / Anthony Wallace in Position, n° 81 (February - March 2016)PermalinkAuscultation de l’état de surface de revêtements routiers par photogrammétrie automatisée / Gildas Allaz in XYZ, n° 146 (mars - mai 2016)Permalink