Airborne LiDAR

Airborne laser scanners can be mounted into fixed wing or helicopter aircraft. Airborne laser scanning can map the terrain 'beneath' the tree canopy. Comparing tree canopy and ground surface also enables the study of changes in 'bio-mass'.

The LiDAR is processed automatically to seperate the returns into ground and vegetation files. This allows us to create 'bare earth' models without buildings or trees. The LiDAR can be processed in order to produce a variety of products including contour maps, cross-sections and digital elevation models (DEM's). From the DEM a variety of maps can be made, including shaded relief maps, vector maps (showing water flow), 3D perspective maps, slope maps, hillshade maps and ortho-drape maps.

Terrestrial LiDAR

Merrett Survey Partnership own a state of the art Leica Scanstation II. This is a terrestrial LiDAR instrument that can be used for a variety of work such as for scanning building facades to produce detailed elevations, scanning rock formations and cliffs to produce 3D models and to calculate very accurate volumes. The Scanstation II can scan up to 50,000 points per second, has an effective range of 300m and delivers survey-grade accuracy for each point.We can also deploy the longer range Riegl laser scanner for cliff face and quary survey work (1000m range).