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Table 2 Specifications of the used hardware

From: Emergent heritage: the digital conservation of archaeological sites in reservoirs and the case of the Dolmen de Guadalperal (Spain)

Device Purpose Specifications
Faro Focus 3D X330 (TLS) Recording of point clouds Range: 0.6–330 m
Ranging error (systematic measument error at around 10 m and 25 m):  ±  2 mm
Measurement rate (pts/sec): 9,76,000
DJI Phantom 4 Pro (UAV) Aerial photogrammetry GPS-GLONASS positioning system (±  0.5 m vertical accuracy,  ±  1.5 horizontal accuracy)
Effective: pixels: 20 million
Image sensor: one-inch CMOS sensor
Image size: 5472  ×  3648 pixels
File format: JPEG
Focal length (fixed): 8.8 mm
GoSCAN 50 (short-range scanner) Recording of point clouds Range (recommended): 0.05–0.5 m
Accuracy: 0.1 mm
Resolution: 0.1 mm
Measurement rate (pts/sec): 5,50,000
Scanning area: 143  ×  108 mm
Nikon D5300 (camera) Close-range photogrammetry Effective pixels: 24.2 million
Image sensor: 23.5  ×  15.6 CMOS sensor
Image size: 6000  ×  4000 pixels
File format: NEF, 14 bit compressed
Focal length (used): 18 mm