Table 1.
Sensors | Cameras | Laser Scanners | |||
---|---|---|---|---|---|
Sensor Type | Canon 7D | DJI Camera Sensor | Sensor Type | ScanStation2 | RIEGL VMX-250 |
Site | Close-range | UAV | Site | Close-range | UAV |
Distance to object (m) | 4–6 | 80 | Scan speed (points per second) | 50,000 | 600,000 |
GSD (m) | 0.001 | 0.025 | Points density (points per square meter) | 180,000 | 40,000 |
Number of images | 14 | 37 | Range accuracy (mm) | 5 | 5 |