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DEM generation and building detection from Lidar data / R. Ma in Photogrammetric Engineering & Remote Sensing, PERS, vol 71 n° 7 (July 2005)  

Public [article]  inPhotogrammetric Engineering & Remote Sensing, PERS > vol 71 n° 7 (July 2005) . - pp 847 - 854 Titre : DEM generation and building detection from Lidar data Type de document : Article/Communication Auteurs : R. Ma, Auteur Année de publication : 2005 Article en page(s) : pp 847 - 854 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique [Termes IGN] contour [Termes IGN] densité des points [Termes IGN] détection du bâti [Termes IGN] données lidar [Termes IGN] données localisées [Termes IGN] modèle numérique de surface [Termes IGN] point d'appui [Termes IGN] reconstruction 3D Résumé : (Auteur) Object reconstruction has attracted great attention from both computer vision and photogrammetry communities, and new technologies are being introduced into this research society. Lidar (Light Detection And Ranging) has become well recognized in the geomatics community since the late 1990s. Compared with traditional photogrammetry, lidar has advantages in measuring surface in terms of accuracy and density, automation, and fast delivery time. There is a large market in geo-data acquisition and object recognition for lidar technology (Baltsavias, 1999). In a general sense, lidar is a companion technology for traditional photogrammetry. The direct product that can be derived from lidar data is the DSM (Digital Surface Model), which depicts the topography of the earth's surface, including objects above the terrain. Further processing can be carried out to generate DEM (Digital Terrain Model) and object models like buildings, which is very useful information in telecommunication, city planning, flood control, and tourism. Morphology and classification are two commonly used methods in DEM generation and object reconstruction. However, these two methods are either sensitive to errors or of low accuracy. In this paper, a new method is proposed to extract ground points for DEM generation and to detect points belonging to buildings. A new method for boundary regularization is also proposed. The results show that buildings can be detected with high accuracy from lidar data. Numéro de notice : A2005-299 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.71.7.847 En ligne : https://doi.org/10.14358/PERS.71.7.847 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27435 [article]

Integration of mobile GIS and wireless technology for coastal management and decision-making / X. Niu in Photogrammetric Engineering & Remote Sensing, PERS, vol 71 n° 4 (April 2005)  

Public [article]  inPhotogrammetric Engineering & Remote Sensing, PERS > vol 71 n° 4 (April 2005) . - pp 453 - 459 Titre : Integration of mobile GIS and wireless technology for coastal management and decision-making Type de document : Article/Communication Auteurs : X. Niu, Auteur ; R. Ma, Auteur ; T. Ali, Auteur ; R. Li, Auteur Année de publication : 2005 Article en page(s) : pp 453 - 459 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG [Termes IGN] aménagement du littoral [Termes IGN] architecture de système [Termes IGN] érosion côtière [Termes IGN] internet [Termes IGN] outil d'aide à la décision [Termes IGN] positionnement par GPS [Termes IGN] SIG nomade [Termes IGN] surveillance géologique [Termes IGN] système d'information géographique [Termes IGN] télécommunication sans fil Résumé : (Auteur) Geographic Information Systems (Gis) have become a crucial support tool for governmental decision makers at many levels. Intemet-based Gis applications provide unique services for the presentation of spatial data and mapping products to a broad range of audiences. Furthermore, compact and portable mapping devices provide new opportunities for the expansion of Internet-based Gis applications. In this paper, we present results of the research and development of a web-based, mobile, spatial system for coastal management, and decision-making that integrates these technologies. The developed system consists of an on-site mobile spatial subsystem, a web-based shoreline erosion awareness subsystem, and a coastal structures permit subsystem. The system is designed and developed for applications in the Lake Erie area and has the potential to be adapted and applied in other coastal areas. Numéro de notice : A2005-161 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.14358/PERS.71.4.453 En ligne : https://doi.org/10.14358/PERS.71.4.453 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27299 [article]