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Browsing by Subject "Digital Surface Model"

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  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Ortofotomapa w terenach miejskich
    (Wydawnictwa AGH, 2006) Borowiec, Natalia; Zabrzeska-Gąsiorek, Barbara
    Orthophotomap is a very beneficial layer in a GIS - it provides accurate base map with advantages of the photograph. In urban areas the conventional orthorectification based on a Digital Terrain Model has encountered many difficulties, because do not consider the surface of buildings, bridges, etc. Such objects remain in perspective view and have radial distortion on the resulting orthophotomaps. If buildings and other elements higher then ground describes a Digital Surface Model, the displacement can also be corrected, and results are called »true orthophotomap« - imagery without building lean. This paper presents the problems of the generation digital »true orthophotomap« in urban areas with acquisition of laser scanner data.