Understanding LiDAR Returns: Utilizing Ground Representations in Remote Sensing

Which return from a LIDAR pulse would be used to represent the ground or bare earth

Answer with Step by Step Explanation

3. Multiple Returns: In complex environments, such as urban areas or dense forests, multiple returns can be detected from different objects at varying heights. These returns may include intermediate returns from buildings, trees, or other objects between the first and last returns.

The selection of the appropriate return type depends on the specific application and the data processing requirements. For applications involving terrain modeling or elevation mapping, the last return is generally used to extract ground elevations accurately. Algorithms and software are employed to filter out unwanted returns and extract the ground surface information effectively.