SPR809 Digital Appendix
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WARNING!

This pointcloud viewer is not optimised for mobile viewing. For the best user experience, it is recommended to view this digital appendix via desktop or laptop.

  • RAI class

    unclassified
    talus
    intact
    fragmented discontinous rock
    closely spaced discontinous rock
    widely spaced discontinous rock
    steep overhang
    cantilevered overhang
  • RAI score

Information

Project Overview

This page concisely displays lidar data collected as part of the SPR809 "Predicting seismic-induced rockfall hazard for targeted site mitigation" research project. Visit the Home Page for more information about the project.

RAI Classification

The RAI is a simple morphological based approach for assessing rockfall hazard. Points are assigned one of eight classes based of a classification scheme that utilizes a combination of local slope and roughness values.

  • U - Unclassified
  • T - Talus
  • I - Intact
  • Df - fragmented discontinous rock
  • Dc - closely spaced discontinous rock
  • Dw - widely to moderately spaced discontinous rock
  • Os - steep overhang
  • Oc - cantilevered overhang

From these classifications, the "RAI score" (estimated annual kinetic energy in kilojoules) is calculated for each point using empircally derived failure depths/rates for each class.

More information, including the background, development, and classification methods used by the RAI can be found by in the RAI paper.


Data Attribution

Data displayed was collected as part of a research project performed by Oregon State University and funded by the Oregon Department Of Transportation (ODOT) under research project SPR809.

  • RAI class/score Pointcloud data was collected using the Leica P40 and Riegl VZ-400 terrestrial lidar scanners.
  • Background pointcloud data was created using a combination of TLS, MLS and UAS sfm data depending on site (UAS/MLS data courtesy of ODOT).
  • Data displayed was subsampled to 5cm for hosting reasons, and thus does not represent the full resolution of available data.
  • Data visualization on this site was created using potree.

DISCLAIMER: Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the Oregon Department of Transportation or Oregon State University.


Help (1/9) - Layout

First slide

This page contains point-clouds in a potree viewer. Various operations can by carried out using the tools contained in the sidebar on the top left of the page. Specific information about the project and the RAI can found by selecting the information icon on the right of the page.

First slide

Use the left mouse button to orbit around a point. Use the scroll wheel to zoom. Use the right mouse button to pan the view. Double click a point to fly to it and reset the rotation center.

First slide

Under "Appearance" in the sidebar, there are various appearance sliders and buttons which you can use to change the quality and settings of the potree viewer, as well as changing the background color under the "Appearance" tab.

First slide

Located in the top right corner, the scene box allows users to toggle on/off the RAI class, RAI score and Background pointclouds. The RAI class scalebar can popup class names by hovering the mouse over the class. More information about the RAI classes and RAI score can be found by clicking the info icon at the top of the screen, or the RAI score or RAI class text.

First slide

The measurements toolbar enables some basic measurements on the pointcloud (including point query, distance/height and angle measurements, area measurements) Left click to insert a new vertex. Right click to complete a measurement. Measurements are displayed on the screen and also under the "measurements" branch in the scene tree where they can be copied or exported. The "Remove All" (red X) button will clear all measurements.

First slide

Under "tools" - "measurement", the cross-section tool allows a cross-section to be created perpendicular to the Z-axis. Create the profile by selecting the tool, left click to add vertices, right click to finish the cross-section. A profile can then be viewed/exported under the "Measurements" branch in the scene tree by selecting - "show 2d profile". The width of the cross-section can also be modified.