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The aim of this contribution is to show the results of evaluations on 3D digitizations performed using different methodologies andtechnologies. In particular, for surveys conducted at the architectural and urban scale, the recent reduction of costs related to Time ofFlight and phase shift laser scanners is actually enhancing the replacement of traditional topographic instruments (i.e. total stations)with range-based technologies for the acquisition of 3D data related to built heritage. If compared to surveys performed usingtraditional topographic technologies, range-based ones offer a wide range of advantages, but they also require different skills,procedures and times. The present contribution shows the results of a practical application of both approaches on the same casestudy.  Another application was suggested by the recent developments in the photogrammetric field that enhance the improvement ofsoftware able to automatically orient uncalibrated cameras and derive dense and accurate 3D point clouds, with evident benefits inreduction of costs required for survey equipment. Therefore, the presented case study constituted the occasion to compare a rangebasedsurvey with a fast 3D acquisition and modelling using a Structure from Motion solution. These survey procedures wereadopted at an architectural scale, on a single building, that was surveyed both on the outside and on the inside.  Assessments on the quality of the rebuilt information is reported, as far as metric accuracy and reliability is concerned, as well as ontime consuming and on skills required during each step of the adopted pipelines. For all approaches, these analysis highlightedadvantages and disadvantages that allow to conduct evaluations on the possible convenience of adopting range-based technologiesinstead of a traditional topographic approach or a photogrammetric one instead of a range based one in case of surveys conducted atan architectural/urban scale

the international archives of the photogrammetry, remote sensing and spatial information sciences/international archives of the photogrammetry, remote sensing and spatial information sciences

ASSESSMENTS FOR 3D RECONSTRUCTIONS OF CULTURAL HERITAGE USING DIGITAL TECHNOLOGIES