Terrestrial Laser Scanner (TLS) has become a familiar instrument to be used in wide range of engineering application. It can for the rapid capture accurate and highly detailed 3D point cloud datasets. The advantage laser scanner is that it record huge number points short period time. main idea this contribution assesses accuracy TLS relative other traditional surveying instruments. This done th...

The intensity data produced by terrestrial laser scanners has become a topic of increasing interest in the remote sensing community. We present a case study of radiometric calibration for two phase-shift continuous wave (CW) terrestrial scanners and discuss some major issues in correcting and applying the intensity data, and a practical calibration scheme based on external reference targets. Th...

For accurate astronomic and geodetic observations based on radio telescopes, the elevation-dependent deformation of the radio telescopes' main reflectors should be known. Terrestrial laser scanning has been used for determining the corresponding changes of focal lengths and areal reflector deformations at several occasions before. New in this publication is the situation in which we minimize sy...

Recently, laser scanning has been receiving greater attention as a useful tool for real-time 3D data acquisition, and various applications such as city modelling, DTM generation and 3D modelling of cultural heritage sites have been proposed. However, robust filtering systems for distinguishing onand off-terrain points from 3D point-cloud data collected by an airborne laser scanner still have ma...

Accurate modelling of individual trees is essential for forestry applications e.g. forestry inventory and biomass estimation. This paper aims to utilise Terrestrial Laser Scanners (TLS) in order to derive a three dimensional (3D) tree structure and compute its volume. A new approach is proposed and tested to estimate the tree structure and leaf area using precise voxel-based tree models. In thi...

This paper describes direct interactive relative orientation method between terrestrial digital images and laser scanner data. Traditionally, the orientation between images and 3D data requires interactive work and accurate reference points or visible features. Laser scanning data does not easily allow detection of breaklines or corner points. Due to the huge amount of data, however, it is poss...