Aerial Bathymetric Surveying
MAPPING THE SEAFLOOR FROM THE SKIES.
Offers rapid data collection and highly detailed mapping of underwater terrain, achieving up to 200,000 measurements per second with an accuracy of about 2 centimeters.
WHAT IS AERIAL BATHYMETRIC LIDAR SURVEYING?
Bathymetric LiDAR is a specialized remote sensing technology that enables precise mapping of underwater topography, essential for applications such as hydrographic surveying, coastal management, and environmental monitoring. Mounted on a manned aircraft, this method utilizes green laser light, which penetrates water more effectively and efficiently than other wavelengths, to capture detailed measurements of submerged terrains, all while minimizing marine disturbance.
HOW AERIAL BATHYMETRIC
(LIDAR) SURVEYING WORKS
Bathymetric LiDAR systems, like the Riegl VQ-850-G, release green laser pulses similar to those used in aerial topographic LiDAR. However, these systems are specifically engineered to penetrate water.
They utilize a non-Near Infrared (NIR) wavelength that is not readily absorbed by water, making them effective for underwater surveying. The green laser, typically around 532 nm, is chosen for its ability to reach the seabed even in turbid water conditions. Additionally, the Riegl VQ-850-G collects data in a unique pattern, employing both tilted and circular scanning to comprehensively capture underwater topography, ensuring detailed and accurate bathymetric maps.
This method allows for precise measurement of underwater features, supporting various marine and coastal applications, including navigation safety and environmental monitoring.
