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Visualization

komazsofi edited this page Sep 11, 2017 · 12 revisions

LiDAR point clouds most commonly saved into LAS or more compressed LAZ format. That is the ASPRS standard. LAS format contained the following information:

Attribute name Description Comment
X
Y
Z
Intensity Mostly uncorrected
Return Number
Number of return Given pulse
Classification flag
Scanner Channel
Scan direction flag
Edge of flight line
Classification based on ASPRS standard
User data
Scan angle
Point Source ID
GPS time
Red RGB is coming from the fusion of simultaneously measured imagery data
Green RGB is coming from the fusion of simultaneously measured imagery data
Blue RGB is coming from the fusion of simultaneously measured imagery data
NIR

LAS/LAZ file format is not capable of saving a large number of point cloud related attributes.

  • FugroViewer

General point cloud visualization tool, without export and edit opportunities. However capable for 2D, 3D and cross-plot visualization based on the different attributes (only las file defined attributes).

  • Cloud Compare

It is capable of visualizing several numbers of defined extra attributes (from ASCII txt, csv file) and even random colorization for segmentation result visualization. In this software was implemented a large number of different LiDAR file format like pcd (PCL library), ply, obj (CAD formats), etc.

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