In this last year, two huge National programmes have been launched in Italy; both programmes regard remotely sensed images used for disaster prevention, monitoring and assessment. These projects take into account all kind of remotely sensed data (both from geometric and spectral point of view), but particular attention should be paid to high geometric resolution satellite images, where evaluations that are aimed at the definition of the mapping scale, have to be strictly defined for. In this paper all problems connected to the use of satellite images for the production of orthophotos at a middle scale are investigated from a productive point of view. High resolution satellite images position accuracy tests carried out through orthoprojection procedures both using commercial softwares and homemade ones have been taken into account. Planimetric positioning errors and influence of GCPs number on the results will be shown, and moreover how the reference DEM could influence the final result. In detail the improving action of the utilization of an urban Dense DEM (altimetric information of terrain plus buildings) is shown. Finally future planned developments in the homemade orthoprojection algorithms are presented, when operational tasks are considered.

Projects in the field of damage assessment and reduction using high resolution remotely sensed images in italy / Boccardo, Piero; BORGOGNO MONDINO, E.; GIULIO TONOLO, Fabio; Rinaudo, Fulvio. - ELETTRONICO. - (2005). (Intervento presentato al convegno 31st International Symposium on Remote Sensing of Environment tenutosi a ST. PETERSBURG nel 20-24 giugno).

Projects in the field of damage assessment and reduction using high resolution remotely sensed images in italy

BOCCARDO, PIERO;GIULIO TONOLO, FABIO;RINAUDO, Fulvio;
2005

Abstract

In this last year, two huge National programmes have been launched in Italy; both programmes regard remotely sensed images used for disaster prevention, monitoring and assessment. These projects take into account all kind of remotely sensed data (both from geometric and spectral point of view), but particular attention should be paid to high geometric resolution satellite images, where evaluations that are aimed at the definition of the mapping scale, have to be strictly defined for. In this paper all problems connected to the use of satellite images for the production of orthophotos at a middle scale are investigated from a productive point of view. High resolution satellite images position accuracy tests carried out through orthoprojection procedures both using commercial softwares and homemade ones have been taken into account. Planimetric positioning errors and influence of GCPs number on the results will be shown, and moreover how the reference DEM could influence the final result. In detail the improving action of the utilization of an urban Dense DEM (altimetric information of terrain plus buildings) is shown. Finally future planned developments in the homemade orthoprojection algorithms are presented, when operational tasks are considered.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/1416983
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