Laser scan (LiDAR) in detail
Unlike photogrammetry, laser scanning is not an imaging technique, but rather a laser-assisted point measurement process. These point measurements are performed at very high speeds, creating a dense, three-dimensional network of measurement points across the Earth's surface. With current technology, up to 2.5 million points per second can be measured. Depending on the flight speed and altitude, measurement point networks with a density of up to 60 points per square meter can be generated. Under suitable conditions, measurement accuracies of up to 5 cm can be achieved.
LiDAR surveying can be combined with other sensors to create an expanded product. Possible combinations include:
- LiDAR aerial imaging
- LiDAR – Thermal
- LIDAR – Hyperspectral
The individual products are georeferenced together, thus forming a homogeneous database for the respective use case.
GeoFly primarily uses LiDAR systems from the company Riegl.
