LiDAR is a scanning and ranging laser system that produces accurate Digital Terrain Models that can be used for orthophoto production . With the ability to “see through the trees,” LiDAR has the capability to provide accurate surface modeling in places never before possible. Because of its thin beam of light, LiDAR is small enough to shoot between branches on trees and reach the ground, returning data with centimeter precision.
While flying over the project area, a laser sweeps back and forth across the ground scanning the surface and its features. After making contact with the ground, the beam energy returns to the aircraft, producing point data as well as infrared images. After all the data is collected, it is processed into a point-derived image. Each point, which is 3-dimensional, can be viewed in any direction desired, providing a 3D representation of a scene. This gives the ability to look at a segment vertically, sideways, or to rotate the canvas for different views. All of this data can be processed in a matter of weeks (for large areas), unlike manual photogrammetric techniques that require a longer completion time.
- 3D model generation of features
- Surface and land use classification
- Terrain extraction, bare earth modeling and data filtering
- Advanced detection and extraction of buildings or other specific features
- Generation of elevation profiles, Digital Surface Models (DSM) and Digital Terrain Models (DTM) as raster, TIN, contour or slope models
- Building Classification and 3D feature generation
- Vegetation Classification (High, Medium and Low vegetation)
- Electric Tower Classification and Wire detection
- DTM (Digital Terrain Model)
- DSM (Digital Surface Model)
- Building Vector Data (LOD 1&2)
- Power Line vector data
- 3D Vector data for specific features
- Volumetric Calculations
- Contours and elevation points
- Slope models, watershed, water level rise/flooding simulations etc.
Lidar – acquisition and processing