Laser scanning is one of the latest developments within geomatics. Laser scanners measure the 3D co-ordinates of an objects surface in a systematic manner and at high speed, displaying the surveyed data in near real-time.
The technique relies upon line of sight to the desired object/surface, but the user can undertake numerous scans and register the data together to form a more complete model.
Laser instruments can work in conditions that are not suitable to other methods of data capture. Because of this the technique is an effective, accurate and safe way to survey inaccessible areas, such as land slides.
The key features of laser scanning are:
rapid non-contact measurement (up to 12,000 points per second)
high accuracy survey tool (5mm to 50mm range dependant)
able to survey inaccessible areas and complex structures with ease
short to long range data collection (up to 2000m)
Halcrow currently operate three instruments in the UK. As result we can survey from up to 2,000 metres from the required object, achieving an accuracy of less than 50mm. We also have the capability to mount our scanners on top of an off-road vehicle, allowing us to survey large areas within a single working day.
