Airborne Laser Scanning

Airborne Laser Scanning (ALS) is a remote sensing technology that uses laser light to measure the distance between an aircraft and the ground. This creates a high-resolution 3D point cloud of the terrain, which can be used to generate detailed topographic maps and 3D models.

How Does ALS Work?

Here’s a simplified overview of the ALS process:

Aircraft Deployment: An aircraft equipped with a laser scanner, GPS, and inertial measurement unit (IMU) is deployed to fly over the survey area
Laser Pulse Emission: The laser scanner emits pulses of laser light towards the ground
Reflection and Detection: The laser pulses reflect off the ground and return to the aircraft, where they’re detected by the laser scanner
Distance Calculation: The time-of-flight of the laser pulse is calculated, which determines the distance between the aircraft and the ground
Point Cloud Creation: The distance measurements are combined with GPS and IMU data to create a high-resolution 3D point cloud of the terrain.

Applications of ALS

ALS has a wide range of applications, including:

Topographic Mapping: Creating detailed topographic maps for urban planning, infrastructure development, and environmental monitoring.
Forestry Management: Monitoring forest health, detecting changes in forest structure, and estimating biomass.
Flood Risk Assessment: Mapping floodplains, identifying areas at risk of flooding, and modeling flood scenarios.
Infrastructure Inspection: Inspecting roads, bridges, and other infrastructure for maintenance and repair.
Environmental Monitoring: Monitoring land use changes, detecting natural hazards, and tracking environmental degradation.

Benefits of ALS

ALS offers several benefits, including:

High Accuracy: ALS provides high-resolution 3D data with accuracy down to 5-10 cm.
Wide Area Coverage: ALS can cover large areas quickly and efficiently.
Cost-Effective: ALS can reduce survey costs by minimizing the need for ground-based surveys.
Improved Safety: ALS reduces the risk of injury or death by minimizing the need for physical access to hazardous areas.

What we do.

Ground classification

Hydro flattening

Advance classification

Power line classification

Volume calculation

DSM/ DTM/Contour