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Information from imagery: ISPRS scientific vision and research agenda / Jun Chen in ISPRS Journal of photogrammetry and remote sensing, vol 115 (May 2016)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 115 (May 2016) . - pp 3 – 21 Titre : Information from imagery: ISPRS scientific vision and research agenda Type de document : Article/Communication Auteurs : Jun Chen, Auteur ; Ian J. Dowman, Auteur ; Songnian Li, Auteur ; Zhilin li, Auteur ; Marguerite Madden, Auteur ; Jon Mills, Auteur ; Nicolas Paparoditis , Auteur ; Franz Rottensteiner, Auteur ; Monika Sester, Auteur ; Charles K. Toth, Auteur ; John C. Trinder, Auteur ; Christian Heipke, Auteur Année de publication : 2016 Article en page(s) : pp 3 – 21 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques [Termes descripteurs IGN] image à haute résolution [Termes descripteurs IGN] information géographique [Termes descripteurs IGN] informatique ubiquitaire [Termes descripteurs IGN] recherche et développement [Termes descripteurs IGN] technologies de l'information et de la communication [Termes descripteurs IGN] télédétection spatiale Mots-clés libres : Research agenda  Photogrammetry  Remote sensing  Spatial information science Résumé : (auteur) With the increased availability of very high-resolution satellite imagery, terrain based imaging and participatory sensing, inexpensive platforms, and advanced information and communication technologies, the application of imagery is now ubiquitous, playing an important role in many aspects of life and work today. As a leading organisation in this field, the International Society for Photogrammetry and Remote Sensing (ISPRS) has been devoted to effectively and efficiently obtaining and utilising information from imagery since its foundation in the year 1910. This paper examines the significant challenges currently facing ISPRS and its communities, such as providing high-quality information, enabling advanced geospatial computing, and supporting collaborative problem solving. The state-of-the-art in ISPRS related research and development is reviewed and the trends and topics for future work are identified. By providing an overarching scientific vision and research agenda, we hope to call on and mobilise all ISPRS scientists, practitioners and other stakeholders to continue improving our understanding and capacity on information from imagery and to deliver advanced geospatial knowledge that enables humankind to better deal with the challenges ahead, posed for example by global change, ubiquitous sensing, and a demand for real-time information generation. Numéro de notice : A2016-541 Affiliation des auteurs : IGN+Ext (2012-2019) Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2015.09.008 date de publication en ligne : 09/10/2015 En ligne : http://dx.doi.org/10.1016/j.isprsjprs.2015.09.008 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=81686 [article]

Modelling vertical error in LiDAR-derived digital elevation models / F. Aguilar in ISPRS Journal of photogrammetry and remote sensing, vol 65 n° 1 (January - February 2010)

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 65 n° 1 (January - February 2010) . - pp 103 - 110 Titre : Modelling vertical error in LiDAR-derived digital elevation models Type de document : Article/Communication Auteurs : F. Aguilar, Auteur ; Jon Mills, Auteur ; J. Delgado, Auteur ; et al., Auteur Année de publication : 2010 Article en page(s) : pp 103 - 110 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie [Termes descripteurs IGN] données lidar [Termes descripteurs IGN] données localisées 3D [Termes descripteurs IGN] interpolation inversement proportionnelle à la distance [Termes descripteurs IGN] lasergrammétrie [Termes descripteurs IGN] modèle d'erreur [Termes descripteurs IGN] modèle numérique de surface Résumé : (Auteur) A hybrid theoretical–empirical model has been developed for modelling the error in LiDAR-derived digital elevation models (DEMs) of non-open terrain. The theoretical component seeks to model the propagation of the sample data error (SDE), i.e. the error from light detection and ranging (LiDAR) data capture of ground sampled points in open terrain, towards interpolated points. The interpolation methods used for infilling gaps may produce a non-negligible error that is referred to as gridding error. In this case, interpolation is performed using an inverse distance weighting (IDW) method with the local support of the five closest neighbours, although it would be possible to utilize other interpolation methods. The empirical component refers to what is known as “information loss”. This is the error purely due to modelling the continuous terrain surface from only a discrete number of points plus the error arising from the interpolation process. The SDE must be previously calculated from a suitable number of check points located in open terrain and assumes that the LiDAR point density was sufficiently high to neglect the gridding error. For model calibration, data for 29 study sites, 200*200 m in size, belonging to different areas around Almeria province, south-east Spain, were acquired by means of stereo photogrammetric methods. The developed methodology was validated against two different LiDAR datasets. The first dataset used was an Ordnance Survey (OS) LiDAR survey carried out over a region of Bristol in the UK. The second dataset was an area located at Gador mountain range, south of Almería province, Spain. Both terrain slope and sampling density were incorporated in the empirical component through the calibration phase, resulting in a very good agreement between predicted and observed data (R2=0.9856;p Numéro de notice : A2010-233 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30427 [article]

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Spatial decision support in a post-disaster environment: A community-focused approach / Jon Mills in Cartographica, vol 44 n° 1 (March 2009)

Public [article]  inCartographica > vol 44 n° 1 (March 2009) . - pp 17 - 31 Titre : Spatial decision support in a post-disaster environment: A community-focused approach Type de document : Article/Communication Auteurs : Jon Mills, Auteur Année de publication : 2009 Article en page(s) : pp 17 - 31 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes d'information géographique [Termes descripteurs IGN] analyse spatiale [Termes descripteurs IGN] approche participative [Termes descripteurs IGN] catastrophe naturelle [Termes descripteurs IGN] environnement [Termes descripteurs IGN] outil d'aide à la décision [Termes descripteurs IGN] participation du public [Termes descripteurs IGN] SIG participatif [Termes descripteurs IGN] système d'information géographique Résumé : (Auteur) Disasters, by definition, are low-frequency, high-impact events. Because of the infrequent occurrence and dynamic conditions of such events, researchers do not often have the ability to thoroughly study their effects. However, as population distributions and densities place more people at risk of experiencing a disaster, more complete investigations of these events are needed. Recovery, the post-disaster phase of returning to “normalcy,” is one understudied aspect. Gaining a better understanding of this process has important implications for the well-being of disaster-affected people and equitable redevelopment of affected places. This article focuses on one aspect of recovery: spatial decision support for communities. Though the literature on community mapping discusses a variety of cases in which geographic information systems (GIS) are used as a tool to engage the public on a variety of issues, it has yet to address concerns in a post-disaster environment. Furthermore, existing research in geographic information science (GISc) for disasters has only limited dealings with community-focused mapping. The result is that community information needs in a post-disaster environment have not been recognized. Based on existing literature and empirical observations from post-Katrina Louisiana, this article addresses the spatial component of these information needs and how GISc can provide decision-support tools in a post-disaster environment. Copyright University of Toronto Press Numéro de notice : A2009-094 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29724 [article]

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Videogrammetric monitoring of as-built membrane roof structures / S.Y. Lin in Photogrammetric record, vol 23 n° 122 (June - August 2008)

Public [article]  inPhotogrammetric record > vol 23 n° 122 (June - August 2008) . - pp 128 - 147 Titre : Videogrammetric monitoring of as-built membrane roof structures Type de document : Article/Communication Auteurs : S.Y. Lin, Auteur ; Jon Mills, Auteur ; P.D. Gosling, Auteur Année de publication : 2008 Article en page(s) : pp 128 - 147 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes descripteurs IGN] balise [Termes descripteurs IGN] déformation de surface [Termes descripteurs IGN] données localisées 3D [Termes descripteurs IGN] modèle numérique de surface [Termes descripteurs IGN] surveillance d'ouvrage [Termes descripteurs IGN] toit [Termes descripteurs IGN] Vidéogrammétrie Résumé : (Auteur) A monitoring system that uses applied geomatics techniques, including videogrammetry and terrestrial laser scanning, has been developed in order to investigate the dynamic behaviour of as-built membrane roof structures. To accommodate the problems involved in measuring such roof structures, examples of which include uniform surface texture and unreachable height, the system adopts a non-contact targeting methodology to substitute for traditional control techniques. In-house software was developed for processing the acquired video imagery in order to produce a sequential surface model of the membrane. This paper firstly reports on experiments conducted to demonstrate that the monitoring system was capable of measuring representative test structures with a precision of better than +1 mm. To prove the feasibility and transferability of the system, videogrammetric monitoring campaigns were subsequently performed at a real-world test site where two different types of membrane structure were observed. The sequential 3D surface models that were generated allowed the displacement of the membrane surfaces to be investigated over a period, during which the range of the movement reached over 20 mm. The information acquired from the system is proving to be of great value to structural engineers involved in research and development of such membrane structures. Copyright RS&PS + Blackwell Publishing Numéro de notice : A2008-294 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29287 [article]

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Geometric validation of a ground-based mobile laser scanning system / D. Barber in ISPRS Journal of photogrammetry and remote sensing, vol 63 n° 1 (January - February 2008)

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 63 n° 1 (January - February 2008) . - pp 128 - 141 Titre : Geometric validation of a ground-based mobile laser scanning system Type de document : Article/Communication Auteurs : D. Barber, Auteur ; Jon Mills, Auteur ; S. Smith-Voysey, Auteur Année de publication : 2008 Article en page(s) : pp 128 - 141 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Topographie [Termes descripteurs IGN] données laser [Termes descripteurs IGN] données localisées 3D [Termes descripteurs IGN] lasergrammétrie [Termes descripteurs IGN] lever topographique [Termes descripteurs IGN] milieu urbain [Termes descripteurs IGN] outil d'aide à la décision [Termes descripteurs IGN] précision des données [Termes descripteurs IGN] semis de points [Termes descripteurs IGN] système de numérisation mobile [Termes descripteurs IGN] validité des données Résumé : (Auteur) This paper outlines a study, carried out on behalf of a national mapping agency, to validate laser scanned point cloud data collected by a ground-based mobile mapping system. As the need for detailed three-dimensional data about our environment continues to grow, ground-based mobile systems are likely to find an increasingly important niche in national mapping agency applications. For example, such systems potentially provide the most efficient data capture for numerical modelling and/or visualisation in support of decision making, filling a void between static terrestrial and mobile airborne laser scanning. This study sought to assess the precision and accuracy of data collected using the StreetMapper system across two test sites: a peri-urban residential housing estate with low density housing and wide streets, and a former industrial area consisting of narrow streets and tall warehouses. An estimate of system precision in both test sites was made using repeated data collection passes, indicating a measurement precision (95%) of between 0.029 m and 0.031 m had been achieved in elevation. Elevation measurement accuracy was assessed against check points collected using conventional surveying techniques at the same time as the laser scanning survey, finding RMS errors in elevation in the order of 0.03 m. Planimetric accuracy was also assessed, with results indicating an accuracy of approximately 0.10 m, although difficulties in reliably assessing planimetric accuracy were encountered. The results of this validation were compared against a theoretical error pre-analysis which was also used to show the relative components of error within the system. Finally, recommendations for future validation methodologies are outlined and possible applications of the system are briefly discussed. Copyright ISPRS Numéro de notice : A2008-041 Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29036 [article]

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A robust surface matching technique for integrated monitoring of coastal geohazards / P. Miller in Marine geodesy, vol 30 n° 1-2 (March - June 2007)

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