The city of Genoa has entrusted SIT, a company of the Angel group, together with other partner companies, the Updating service of its Topographical Database. For the provision of this service, SIT is using the integration of latest-generation technological systems and innovative methodologies for the acquisition of territorial data (aerial, terrestrial surveys and backpack system) for the digital reconstruction of the city and the realization of cartographic products (very high resolution orthophotos, very high density point cloud and dense digital terrain and surface models). This is one of the key jobs for SIT, both for the possibility of using and integrating different latest-generation acquisition technologies and for the relevance of the Customer.