Frequently Asked Questions
LiDAR (Light Detection and Ranging) is a remote sensing method that uses laser light to measure distances to objects or surfaces and creates accurate 3D representations of the environment.
LiDAR emits laser pulses that bounce off objects and return to a sensor. By measuring the time it takes for each pulse to return, LiDAR calculates the distance and creates detailed 3D maps.
LiDAR has many uses, such as autonomous vehicles, mapping and surveying, forestry, archeology, urban planning, construction, and environmental monitoring.
LiDAR uses laser pulses to directly measure distances and create high-precision 3D models. Photogrammetry relies on overlapping photographs taken from multiple angles to generate 3D models through image processing. While LiDAR works well in low-light and complex environments (like dense forests), photogrammetry often provides more visual detail but can be less effective in such conditions.
LiDAR systems can be categorized into airborne LiDAR (used on planes, drones, or helicopters for wide-area surveys) and terrestrial LiDAR (mounted on tripods, vehicles, or handheld devices for ground-level data collection).
LiDAR accuracy varies based on system specifications and environmental conditions, but modern systems often achieve accuracy within a few centimeters or even millimeters.
Point clouds are dense collections of data points in 3D space generated by LiDAR. Each point represents a laser return from an object's surface, enabling the creation of detailed 3D models.
LiDAR offers faster data collection, higher precision, the ability to cover large and hard-to-reach areas, and the capability to operate effectively under various lighting conditions.
Adverse weather conditions such as heavy rain, fog, and snow can impact LiDAR performance by scattering or absorbing laser beams, which may reduce accuracy and range.
LiDAR systems typically consist of a laser emitter, scanner, receiver/sensor, GPS unit, and Inertial Measurement Unit (IMU) for recording orientation and position.