isprsarchives XXXVIII 5 W12 85 2011
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There are three typical scanning methods: TLS (Terrestrial Laser Scanning), MMS (Mobile Mapping System), and ALS (Airborne Laser Scanning). TLS can acquire point clouds in
In a post- processing step, the sensor data is used to reconstruct the car’s trajectory for the period of the scan and, based on this information, the track of the scan device
ASSESSMENT OF THE ABSOLUTE PLANIMETRIC ACCURACY IN GENERAL Absolute accuracies of ALS data are derived by comparison with reference data of superior accuracy.. It is optimal to use
Figures 8 left and right, show the extracted ground segment and the refined one from the second and third phases, it is clear that the segmentation parameters which have been
Figure 8: Dimensionality labelling for the MMSF dataset using a constant neighborhood size for the whole point cloud ( left ), and the optimal value per point selected with Ef (
Correcting the absolute orientation of the block If proper ground control information in a superior world coordinate sys- tem is given, a correction of absolute orientation of
Based on the previous observations, it can be noted that intensity data can be effectively used for distinguishing man- mad objects from the vegetation.
The proposed method comprises following steps: (1) recognize primitives from LiDAR point cloud and roughly measure primitives’ parameters as initial values, and (2) select
