Abstract
Abstract. The complex archaeological site documentation benefits for a long time now from the aerial point of view and remote sensing methods. Moreover, the recent research on UAV photogrammetry platform equipment and flight planning actively contribute in this sense for a scaling improvement and cost-benefits balance. Frequently, the experiences on articulated topographic profiles in archaeological excavations require not only a multi-sensor approach but also and above all a multiscale one. According to this line, in a general time-cost ration framework, the geometric content of the generated DSMs should be complete of nadir and oblique point of view for the accurate 3D reconstruction of both upstanding buildings and excavations. In the same way, also the radiometric content closely depends on sensor payload quality and is strictly affected by excavation site condition, related to the site material and light. In this research, carried out in the impressive archaeological site of the ancient city of Hierapolis in Phrygia (Turkey) in the autumn 2019 campaign, the main goal was to evaluate and validate the overall performance of a novel UAV fix-wing ultralight platform with onboard GNSS receiver for RTK/PPK processing of cameras positioning and with the possibility of oblique images capturing. The expected contribute in terms of the acquisition, processing time, radiometric enhancement and geometry 3D reconstruction will be explored with preliminary test and outcomes, and with the results of the high-scale DSM and orthoimage generation of the complete Hierapolis site.
Highlights
In the context of wide range and high scale mapping, especially in complex archaeological documentation domain, we are recently witnessing the evolution of advanced and adaptive technological solutions for photogrammetric purposes and digital 3D modelling with the use of Unmanned Aerial Vehicles (UAV) equipment
Drones are increasingly developed with accurate onboard GNSS receivers for more precise real-time positioning aimed at direct photogrammetry solution (Chiabrando, Giulio Tonolo, & Lingua, 2019) and with high-quality sensors and experimenting tilting cameras (Amrullah, Suwardhi, & Meilano, 2016)
The hardware characteristics of the employed platform are 1.16 m wingspan and 1.4 Kg weight; the UAV is equipped by a dual-frequency GNSS that could work in RTK (Real Time Kinematic) or in PPK (Post Processing Kinematic)
Summary
In the context of wide range and high scale mapping, especially in complex archaeological documentation domain, we are recently witnessing the evolution of advanced and adaptive technological solutions for photogrammetric purposes and digital 3D modelling with the use of Unmanned Aerial Vehicles (UAV) equipment. As the Hierapolis ancient city of almost 3km, where is conducted the present research, are subject to many variables affecting first of all the acquisition phase, and the data processing and expected results: a) the area extension and accessibility b) the micro- and macro-topography features c) the environment conditions (light, colours, material, etc.) As a solution, the benefits from the use of fixed-wing platforms, which guarantee durability, speed, wideness and regularity of the photogrammetric coverage, can be well combined with the geometric reconstruction capabilities potential of the oblique images, which instead are typically associate to multi-rotor platforms with tilt angle cameras. In this research the use of an advanced fixwing-type drone with light-weight, capable of time endurance, has been tested in an extensive archaeological site (see Par. 2), thanks to the implementation of a high-resolution tilting camera capable of triple image acquisition in nadir and oblique configuration
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
