Abstract
Abstract. The paper points the attention to some hidden parts of metric surveys, that usually are not enough documented in scientific papers but in technical reposts. Reporting encountered challenges and discussing identified technical solutions and methodologies to overcome bottlenecks and operative issues, highlights the novelty of the presented experience from a technical viewpoint. The overall approach has been reported taking care of describing technical details and present case study’s implementation of the applied techniques. Integrating GNSS control Networks and topographic tools to design, implement and perform a rigorous topographic survey methodology in describing built heritage, which is one of the modern geomatics’ advancements, has been depicted. An ad hoc datum has been designed to guarantee a clear compliance both to cartographic standards and architectural representations in 1:50 to 1:100 graphical output scale.
Highlights
The architectural survey has made extensive use of topographic tools and geomatics to add objectivity and metric rigour to the description of the built heritage in recent times
The geometric survey, which has always been a crucial tool to understand architecture, has acquired in this way the rigorous form of cartography. It has integrated the wealth of photogrammetry information and quickly grasped the potential of 3D scanning systems (Bonora et al, 2021; Mugnai et al, 2021; Wang et al, 2017)
The horizontal coordinates and elevations of the vertices have been appropriately determined, and it has been possible to reference the detailed survey made by integrating 3D scanning systems and digital photogrammetry
Summary
The architectural survey has made extensive use of topographic tools (first) and geomatics (later) to add objectivity and metric rigour to the description of the built heritage in recent times The geometric survey, which has always been a crucial tool to understand architecture, has acquired in this way the rigorous form of cartography It has integrated the wealth of photogrammetry information and quickly grasped the potential of 3D scanning systems (Bonora et al, 2021; Mugnai et al, 2021; Wang et al, 2017). A geodetic reference frame is essential to allow both the correct georeferencing of the survey and ensure uniform accuracy Both aspects are relevant in large, monumental buildings, such as the case study presented in the paper: the Pitti Palace (Figure 1) in Florence (Italy). The paper further describes the choices adopted for the design, construction, calculation, and adjustment control network and its ad-hoc defined cartographic projection In this way, the horizontal coordinates and elevations of the vertices have been appropriately determined, and it has been possible to reference the detailed survey made by integrating 3D scanning systems and digital photogrammetry
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