Airborne Laser Scanning (ALS, also known as LiDAR - Light Detection And Ranging) is a leading technology for the accurate and efficient mapping of the earth’s topography. We utilize the latest developments in this technology, with experience dating back to when the technology first became commercially available.
Our strengths include:
Airborne Laser Scanning products are used for:
Mode of Operation:
Mounted on an aircraft, the sensor emits a high frequency laser beam towards the earth at a very high repetition rate of hundreds of thousands of measurements per second, each of which hits the target surface and reflects a small portion of its energy back to the sensor. A receiver in the sensor detects the reflected laser pulses from the earth's surface or from objects on the surface.
To make the laser scanner data spatially relevant, an inertial navigations system (INS) and a high-precision global positioning system antenna (dGPS) are mounted on the aircraft.
The INS measures the attitude and the orientation of the laser scanner system, while the position of the laser scanner system is determined using the dGPS. After the flight, the data are processed using specially designed computer software. The end products are high-precision digital terrain models (DTM) and digital surface models (DSM) with an accuracy better than 5 cm vertically by 10 cm horizontally.