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Road network extraction in suburban areas / A. Grote in Photogrammetric record, vol 27 n° 137 (March - May 2012)  

Public [article]  inPhotogrammetric record > vol 27 n° 137 (March - May 2012) . - pp 8 - 28 Titre : Road network extraction in suburban areas Type de document : Article/Communication Auteurs : A. Grote, Auteur ; Christian Heipke, Auteur ; Franz Rottensteiner, Auteur Année de publication : 2012 Article en page(s) : pp 8 - 28 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques [Termes IGN] banlieue [Termes IGN] classification à base de connaissances [Termes IGN] cohérence géométrique [Termes IGN] extraction de traits caractéristiques [Termes IGN] extraction du réseau routier [Termes IGN] image infrarouge couleur [Termes IGN] réseau routier Résumé : (Auteur) In this paper, an algorithm for the extraction of road networks in suburban areas is presented. The algorithm is region-based and uses high-resolution colour infrared images as well as, optionally, a digital surface model (DSM). The road extraction starts with a segmentation using the normalised cuts algorithm; afterwards the segments are grouped. Road sections are extracted from the grouped segments. Road sections that are likely to belong to the same road are connected to subgraphs in the next step. To eliminate false connections in the subgraphs, context objects such as vehicles, buildings and trees are employed. The remaining road strings, represented by their centre lines, are connected to a road network. The process employs combinations of radiometric and geometric features, derived from knowledge about the appearance of roads in suburban areas. Results are presented for two test data-sets, acquired by different sensors. A quantitative analysis is performed for the quality of the road extraction as well as the topological quality of the extracted network. Numéro de notice : A2012-128 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/j.1477-9730.2011.00670.x Date de publication en ligne : 14/03/2012 En ligne : https://doi.org/10.1111/j.1477-9730.2011.00670.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31576 [article]

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EuroSDR and its role in developing links between science and national mapping / P. Woodsford in Photogrammetric record, vol 27 n° 137 (March - May 2012)  

Public [article]  inPhotogrammetric record > vol 27 n° 137 (March - May 2012) . - pp 29 - 35 Titre : EuroSDR and its role in developing links between science and national mapping Type de document : Article/Communication Auteurs : P. Woodsford, Auteur Année de publication : 2012 Article en page(s) : pp 29 - 35 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie [Termes IGN] organisme cartographique national [Termes IGN] production cartographique [Termes IGN] recherche scientifique [Termes IGN] transfert de technologie Résumé : (Auteur) This paper describes the process of transfer of technology from research to its employment by national mapping agencies. Starting with the activities in photogrammetry of OEEPE it leads on to the current wider remit of EuroSDR in spatial data provision, management and delivery. It also reflects on current research challenges in imagery from an information management perspective and summarises the contribution to OEEPE/EuroSDR of Professor Ian Dowman. Numéro de notice : A2012-129 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/j.1477-9730.2011.00649.x Date de publication en ligne : 28/08/2011 En ligne : https://doi.org/10.1111/j.1477-9730.2011.00649.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31577 [article]

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Review of developments in geometric modelling for high resolution satellite pushbroom sensors / Daniela Poli in Photogrammetric record, vol 27 n° 137 (March - May 2012)  

Public [article]  inPhotogrammetric record > vol 27 n° 137 (March - May 2012) . - pp 58 - 73 Titre : Review of developments in geometric modelling for high resolution satellite pushbroom sensors Type de document : Article/Communication Auteurs : Daniela Poli, Auteur ; Thierry Toutin , Auteur Année de publication : 2012 Article en page(s) : pp 58 - 73 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s) [Termes IGN] capteur en peigne [Termes IGN] capteur optique [Termes IGN] capteur spatial [Termes IGN] modélisation géométrique de prise de vue Résumé : (Auteur) The geometric modelling of satellite imaging sensors is a fundamental step in the photogrammetric processing chain, and becomes crucial in multi-source data fusion and analysis. This paper seeks to report the main characteristics and developments of optical pushbroom sensors for photogrammetric and remote sensing applications, and to provide a critical review of approaches used for their geometric modelling. Numéro de notice : A2012-130 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/j.1477-9730.2011.00665.x Date de publication en ligne : 09/02/2012 En ligne : https://doi.org/10.1111/j.1477-9730.2011.00665.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31578 [article]

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Application of RPC model in orthorectification of spaceborne SAR imagery / G. Zhang in Photogrammetric record, vol 27 n° 137 (March - May 2012)  

Public [article]  inPhotogrammetric record > vol 27 n° 137 (March - May 2012) . - pp 94 - 110 Titre : Application of RPC model in orthorectification of spaceborne SAR imagery Type de document : Article/Communication Auteurs : G. Zhang, Auteur ; Q. Qiang, Auteur ; Y. Luo, Auteur ; et al., Auteur Année de publication : 2012 Article en page(s) : pp 94 - 110 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image radar et applications [Termes IGN] image radar moirée [Termes IGN] modèle par fonctions rationnelles [Termes IGN] modélisation géométrique de prise de vue [Termes IGN] orthorectification Résumé : (Auteur) It has been widely accepted that the rational polynomial coefficient (RPC) model can be used as an alternative to rigorous sensor models of high resolution optical satellites for photogrammetric processing. In the application of the RPC model to synthetic aperture radar (SAR) image processing, it has been confirmed that the range-Doppler model can be replaced by the RPC model. Until now, however, orthorectification with the RPC model in SAR image processing has not been considered. This paper investigates how to perform orthorectification in SAR image processing with the RPC model. Following a brief introduction about the RPC model for spaceborne SAR imagery, an optimisation model is established and a method of conducting simulations with the RPC model is proposed. Finally, a series of experiments are performed in order to verify the correctness of the theory using TerraSAR-X, COSMO-SkyMed, ERS-2 and Envisat ASAR images as test data. By comparing the actual accuracy and the theoretical accuracy of the orthorectified imagery, the theory and methodology proposed in this paper are confirmed. Numéro de notice : A2012-131 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/j.1477-9730.2011.00667.x Date de publication en ligne : 09/02/2012 En ligne : https://doi.org/10.1111/j.1477-9730.2011.00667.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31579 [article]

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Close range stereophotogrammetry and video imagery analyses in soil ecohydrology modelling / Maria J. Rossi in Photogrammetric record, vol 27 n° 137 (March - May 2012)  

Public [article]  inPhotogrammetric record > vol 27 n° 137 (March - May 2012) . - pp 111 - 126 Titre : Close range stereophotogrammetry and video imagery analyses in soil ecohydrology modelling Type de document : Article/Communication Auteurs : Maria J. Rossi, Auteur ; Jorge O. Ares, Auteur Année de publication : 2012 Article en page(s) : pp 111 - 126 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie terrestre [Termes IGN] écoulement des eaux [Termes IGN] environnement [Termes IGN] hydrologie [Termes IGN] image vidéo [Termes IGN] microtopographie [Termes IGN] photogrammétrie métrologique [Termes IGN] ruissellement [Termes IGN] stéréophotogrammétrie [Termes IGN] zone humide Résumé : (Auteur) Ecohydrology is an emerging discipline in the environmental sciences. Soil micro-relief is of relevance to various ecohydrological processes such as rainwater redistribution, seed displacement through water runoff, water erosion and plant competition for water. Mechanical-optical methods to characterise the soil surface and its incidence in these processes are time consuming and can produce modifications of soil relief. This research explores a methodology combining non-contact techniques (close range stereophotogrammetry and geostatistical modelling) for microtopographic description with video imagery analysis to formulate quantitative determination of surface water movement and infiltration in undisturbed field plots. The numerical quality of the results obtained was tested with ad hoc laboratory models representing various elementary landforms (basin, hill and ridge), as well as with infiltration runoff experiments in undisturbed field plots. The requirements to define a minimum set of properly oriented digital images to attain target precision thresholds in modelling soil microtopography for ecohydrological applications are shown as well as the conditions and experimental arrangement to obtain adequate video imagery of water movement on the soil surface. The use of geostatistical algorithms to analyse ecohydrological processes occurring at the soil surface is illustrated with results obtained from field plots. The methodology presented serves to characterise and quantify water-related ecological processes occurring at the soil surface while preserving undisturbed soil conditions. Potential applications are in ecohydrology, soil erosion science and environmental material transport studies. Numéro de notice : A2012-132 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/j.1477-9730.2012.00672.x En ligne : https://doi.org/10.1111/j.1477-9730.2012.00672.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31580 [article]

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