Working And Application of LiDAR In Road Tree Classification

Identification of tree species is essential for monitoring biodiversity, evaluating ecosystem health, and using forest resources. As a result, the classification of tree species is a crucial area of research in numerous sectors and disciplines, including ecological environment, forestry surveying, and remote sensing. 

LiDAR is a cutting-edge active remote sensing technology that can instantly gather 3D structure and height information for surface targets. Additionally, LiDAR offers the benefits of robust anti-interference performance and effective low-altitude detection. Strong technical support is now available, thanks to the development of LiDAR technology for quick and precise fine classification of vegetation.

LiDAR- An Active Remote Sensing System 

• An active system is one that produces energy on its own, in this case, light, to measure objects on the ground. 
• A fast-shooting laser emits light in a LiDAR system. You may picture a laser light source producing flashes of light swiftly. 
• When this light hits the ground, objects like buildings and tree branches reflect it back. The light energy is subsequently reflected back to the LiDAR sensor, where it is captured. 
• The time it takes for light to travel from an emitter to the ground and back is measured by a LiDAR system. Using that time, the distance traveled is determined. 
• After then, distance is converted to elevation. The essential elements of a lidar system are used to make these measurements.

Application of LiDAR in Road Tree Classification

• Light Energy

The energy of light is made up of photons. Light photons collide with objects like tree branches as they go toward the ground. These things cause some light to bounce off them and come back to the sensor. 

Some light may continue downward toward the ground if the object is small and there are openings around it that permit light to pass through. Because some photons travel downhill toward the ground and others reflect off surfaces like branches, one pulse of light may capture many reflections.

• LiDAR Waveforms

Waveforms are produced by the way energy is distributed as it returns to the sensor. "Intensity" refers to the quantity of energy that was reflected back to the LiDAR sensor. The distribution of energy has peaked in the regions where more photons or light energy return to the sensor. Objects on the ground, such as a branch, a cluster of leaves, or a building, are frequently represented by these waveform peaks.

A tree’s position is determined when Digital Terrain Models are used from ALS Point Clouds. Polosoft Technologies offers exemplary Forest and Road Tree Classification through LiDAR services with 100% accurate data by positional accuracy and strip positioning.