Semi-automatic modeling of buildings from digital surface models

Semi-automatic building detection and extraction is a topic of growing interest due to its potential application in such areas as cadastral information systems, cartographic revision, and GIS. One of the existing strategies for building extraction is to use a digital surface model (DSM) represented by a cloud of known points on a visible surface, and comprising features such as trees or buildings. Conventional surface modeling using stereo-matching techniques has its drawbacks, the most obvious being the effect of building height on perspective, shadows, and occlusions. The laser scanner, a recently developed technological tool, can collect accurate DSMs with high spatial frequency. This paper presents a methodology for semi-automatic modeling of buildings which combines a region-growing algorithm with line-detection methods applied over the DSM.

Africans in the Southern European countries: Italy, Spain and Portugal

Incluye bibliografía

Business development service centres in Italy. An empirical analysis of three regional experiences: Emilia Romagna, Lombardia y Veneto

Includes bibliography

Admisión de Italia como miembro de la CEPAL = Admission of Italy as a member of ECLAC = Admission de l'Italie en qualité de membre de la CEPALC

Presenta la solicitud de admisión de Italia como miembro asociado de la CEPAL.

The co-ordination of hydro and thermal production: the situation in Italy and the experiences of the Edison Group

Includes bibliography