Good morning,

I recently acquired a DJI Matrice 350 drone and a Zenmuse L2 camera.

I carried out LiDAR surveys in high and low vegetation zones. The flights were at 150 m height, with Penta returns.

I observed during processing an extremely low proportion of the fifth return in my point cloud.

In addition, in dense vegetation (groves) of height approximately equal to 3m, I have no point on the ground.

However, in tall vegetation (trees over 20 m), I get points on the ground, and even points from the fifth return.

How to explain this, and have similar results in all types of situations?

Good morning,

I recently acquired a DJI Matrice 350 drone and a Zenmuse L2 camera.

I carried out LiDAR surveys in high and low vegetation zones. The flights were at 150 m height, with Penta returns.

I observed during processing an extremely low proportion of the fifth return in my point cloud.

In addition, in dense vegetation (groves) of height approximately equal to 3m, I have no point on the ground.

However, in tall vegetation (trees over 20 m), I get points on the ground, and even points from the fifth return.

How to explain this, and have similar results in all types of situations?