Airborne LiDAR is an active ground measuring system that integrates laser ranging technology, computer technology, Inertial Measurement Unit (IMU) / DGPS differential positioning technology into one, with high degree of automation, little weather impact, and short data production cycle and high precision.
It could obtain hundreds of thousands of points locating on ground object surfaces per second and result in millions of or billions of points with X, Y, and Z coordinates, which is called point clouds. The 3D shape of ground objects can be clearly and precisely reflected in point clouds. Therefore, it provides another way to view our world.
One of the advantages of airborne LiDAR over other measurement tools is that the laser pulse's penetrating ability makes it suitable for detecting the ground covered by trees and measuring the shape of trees, such as the height of trees and the diameter of canopies.
Due to its unique characteristics, airborne LiDAR has been widely used in the field of survey and mapping, powerline inspection, forestry, geological survey, city planning, disaster monitoring, environment monitoring, coast monitoring, cultural heritage protection, Oil and gas exploration, etc.
The main products of airborne LiDAR include point clouds, high resolution DEM, DSM, DOM, and DLG.
Aerial photogrammetry is generally low altitude flight, which is easy to operate in airspace and will not be affected by extreme weather. At the same time, it is not limited to the needs of take-off and landing sites. It only needs to select a relatively flat site for take-off and landin...
As we all know, aerial photogrammetry technology is playing an increasingly important role in urban planning and construction. Moreover, compared with the traditional topographic survey technology, aerial photogrammetry technology has the advantages of small volume, light weight, ra...
After the LiDAR data is obtained, the data can be post-processed only after data preprocessing. After the data preprocessing, there is a data checking software to conduct a preliminary check on the data results. The general data format check has the follo
