Several techniques and devices for acquiring 3D information have been developed in recent years.
Depending on the purpose and budget, one can choose between several devices for obtaining 3D
data . Terrestrial laser scanners (TLS) allow for obtaining a large amount of 3D positional
information in a fast and efficient way. They are used in numerous applications, such as forestry,
landslides, cultural heritage, deformation analysis and geomorphology. Because of
their continuous increasing use, it is crucial to know both the error source and the uncertainty of any
TLS measurement range. Several studies have analysed the behaviour of these instruments .