FAST SURVEY PROCEDURES IN URBAN SCENARIOS: SOME TESTS WITH 360° CAMERAS

The use of spherical cameras (with a field of view of 360°) is becoming increasingly popular for photogrammetric applications characterised by the opportunity to capture entire scenes in a relatively short time. This potential may be even more interesting for the digitisation of complex areas where, in addition to geometry, time, cost and social context play an important role. This contribution is part of this field of investigation by describing two experiments conducted on the use of an inexpensive 360° camera, the Insta360 OneX2, for the expeditious survey of residual spaces below road junctions. The area under investigation is a node in the city of Naples (Italy) located in the eastern area, considered particularly significant for the interaction between the geographical and infrastructural system. Two different approaches are tested starting from the acquisition of the spherical photographic dataset: the traditional one by means of photogrammetric software and the more economical and user-friendly one by employing the Matterport Capture application. Pros and cons of the two approaches are discussed: the first experimental results are encouraged and support the validity of the approach for surveying complex urban spaces.