Hydroelectric plant on the São Francisco river
From 21 to 24 January 2025, on a hydroelectric plant on the São Francisco river, in the state of Bahia, two people and a single drone photographed the faces of the powerhouse, the spillway and the water intake at 0.85–3 mm per pixel, flying to within 4 m of them, then the whole crest in one continuous survey: 11,809 photos, 33 flights, 66.5 km flown. The 9 orthophotos (46 gigapixels), the 3D models of the powerhouse and spillway, a 10-panorama virtual tour and the 2,492 mapped anomalies were delivered to the operator’s engineers on Sentinel Cloud, with a 46-page report.
Key facts
| Mission | 21–24 January 2025, two people, one Mavic 3 Enterprise RTK |
|---|---|
| Acquisition | 11,809 photos, 33 flights, more than 11 h of flight, 66.5 km flown, IBGE GNSS reference 3 km away |
| Resolution | 0.85 to 3 mm per pixel on the faces, 8 mm on the crest |
| Products | 9 orthophotos (46 gigapixels), 3D models of the powerhouse and spillway, two gate trunnion beams modelled in 3D, 10-panorama virtual tour |
| Anomalies mapped | 2,492 (1,765 on the powerhouse, 581 on the spillway, 145 on the crest), including 2,432 cracks totalling 2.65 km; detachments, exposed rebar, seepage and vegetation |
| Access | Orthophotos, anomalies, 3D models and virtual tour online on Sentinel Cloud |
| Missions listed | 2 |
On the map
2 missions at this location
First web interface delivered for a dam inspection
On 18 February 2025, with the plant report: the 9 orthophotos with their anomalies positioned, 4 3D models (powerhouse, spillway, two trunnion beams) and the virtual tour, available online for one year; a video tutorial was added after the technical meeting on 21 February.
- 9 orthophotos online
- 4 3D models
Drone inspection of a hydroelectric plant on the São Francisco river
From 21 to 24 January 2025, after the site safety induction: 11,809 photos in 33 flights and 66.5 km flown, including close-range flights less than 4 m from the faces; 9 orthophotos (46 gigapixels), two 3D models, a virtual tour and 2,492 mapped anomalies, delivered with a web interface.
- 11 809 photos
- 2 492 anomalies mapped
Tell us about your project
Location, area or structure, expected deliverables and timing: with these details we can propose a method and a quote.
97310 Kourou
French Guiana
Route des Trois-Îlets
97229 Les Trois-Îlets
Martinique
20030-041 Rio de Janeiro – RJ
Brazil