3D Photogrammetry applied to structural & engineering geology
[3D model of quarry cliff-face above: hold left mouse button down to rotate, right mouse button to zoom]. Note that this may not display properly on your mobile device, please find the download below.
As much as it concerns me that we are breeding a generation of geoscientists who won't know what a rock feels like or that characteristic ping that your pick makes when you strike a rock with it, let alone being able to recognise small-scale features such as fabric, movement indicators etc as they won't go up to the rock face; the advances in photogrammetry technology and the fact that a user can get up and running spending less than $200 is fantastic. I see the merit of using this tool to 'map' areas no longer accessible or 'safe' to approach, and for collecting abundant orientation data very quickly.....I probably digitized half of the joint surfaces in the above image quicker than it would take you to find and retrieve your compass from your backpack!
Nearest Neighbour process for Excel
I needed an excel or equivalent method of determining the nearest points in one dataset from another set of xyz points, talking in the range of 100-10000 points. I found some bits and pieces written by others and available on the web, and have fashioned this useful excel spreadsheet process for my own purposes.
2D and 3D Fractal analysis process for Excel
After having applied 2D fractal analysis methods with both coastline and box-count methods in analysing textures in thin-section and hand-specimen, this process was developed as a measure of 3D irregularity/similarity using a 'cube-count' method.....again in excel. I was interested in using this process to analyse XrayCT data comprising 3D imagery of rock/particulate material. Can be equally applied to any 3D surface or point cloud. The read-me file explains the process in more detail.
MORE TO COME IN TIME. I HAVEN'T INCLUDED MUCH EXPLANATORY TEXT SO FEEL FREE TO CONTACT ME VIA EMAIL IF YOU NEED MORE INFO. USE AT YOUR OWN RISK....NO GUARANTEES AS TO ACCURACY AND NO LIABILITY ACCEPTED FOR USE/MISUSE.
Deep Mining Queensland Presentations
This 2-year GSQ funded project was conducted by a team at the WH Bryan Research Centre at the University of Queensland. For more information, visit: https://brc.uq.edu.au/project/brc-deep-mining-queensland and I will also post the GSQ-QDEX location of the final reports and datasets here in June 2017.
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