Manager of Geospatial Airborne Sensor Management & Engineering Group
Asia Air Survey
BiographyAs head of the department in charge of maintenance and management of airborne sensors for AAS, Tomowo Ohga is responsible for aerial photography, aerial laser survey, and aerial laser bathymetry. He is also engaged in collecting information to research and select new technologies and equipment.AbstractEffective Airborne LiDAR operation for mountain topographyAirborne LiDAR Linear mode type is now utilizing tool for High Accuracy Topographic Survey work in recent time. The system pulse rate is more than 1MHz for many point cloud output and also even high altitude 2000m flight can output the high pulse sate points in order to be able to capture the high accurate topography data. Airborne LiDAR significant feature is to capture the accurate ground data under the trees in the mountain that the camera cannot take.
The new type system technology can solve the blind zone data that occurs at height different area as mountain and valley and it can output the high pulse rat. But on the while, the trade-off issue brings the data noise called as ghost often. And also the higher pulse rate, brings the less energy of laser and it would not be able to capture the good ground under the trees with leaves.
Almost the system supplier engineering development offices are at the area of needle leaf trees and the system development engineer sometime does not think for working at the broad leaf area ground data capture, and some systems are not optimized for the ground data capture under the broad leaf. Therefore, so far it was difficult to see the good data for the ground under the broad leaf in Japan that has many mountains (70% of all land) with the broad leaf.
We are solving this issue by the new Airborne LiDAR collaborated with the system supplier and now we would show the samples to improve and also volcano area data that we were forced from ultra-high altitude flight through this presentation.