Come ho verificato un rilievo LiDAR senza poter accedere all'area

Three hours in the field. 3,000 steps on the counter. One of the most comfortable surveys in recent years. Yet the most difficult part wasn't the physical one. The context: a slope in Western Liguria with a landslide that occurred about ten years ago. Now it's necessary to plan safety measures, and we need up-to-date and complete information: cross-sections, elevations, DTMs. The slope is covered in Mediterranean scrub, so LiDAR was the choice. I used the DJI Zenmuse L3 sensor aboard the DJI Matrice 400, with two passes: an automatic nadir with Terrain Follow and a manual 45° pass for the vertical walls. However, the problem with this survey wasn't acquiring the data: it was verifying its reliability. The landslide area was practically inaccessible (private property, steep slope, no reachable point to place targets). Relying solely on the sensor's GNSS RTK is not enough to verify its reliability. The solution was to use a total station integrated with a laser scanner, mounted in an area quite frontal to the landslide. The instrument is a Trimble SX10. I performed a resection of four RTK-measured points to determine the station's position. From there, I performed a laser scan aimed at the slope. The result from the field was two independent 3D point clouds, generated using completely different principles but in the same reference system. I compared them in CloudCompare to get an indication of the final accuracy (here it was about 7 cm). In this video, I show you the workflow, from the field to the data. This is what I used: 📌 Equipment – UAV: ​​DJI Matrice 400 – Lidar: DJI Zenmuse L3 – Total Station and Laser Scanner: Trimble SX10 – GNSS Antenna: Trimble R12i 💻 Software – DJI Terra – LiDAR360 – Trimble Business Center – CloudCompare If you think this video might be interesting to someone you know, please share it with them. I'd be happy to. These are my preferred contacts: Linkedin - paolocorradeghini Telegram - https://t.me/paolocorradeghini Email - [email protected] If you'd like, you can support me by becoming a 3DMetrica backer through my Patreon page: www.patreon.com/3dmetrica It's thanks to those who support the project that I can make these videos for everyone. 0:00 Intro 0:52 Context 1:56 LiDAR Acquisition 4:04 Laser Scanning 9:18 LiDAR Data 10:11 SX10 Data in TBC 13:01 Analysis and Verification 15:54 Considerations 17:54 Final Outputs 18:54 Outro