Thread by @RockIceandSnow, Did you know that you can use land surface roughness to map [...]

Did you know that you can use land surface roughness to map out landslides? See this thread for tools and methods to do just that in #python. These are the results from a 6 month @NSF funded internship I conducted at the @utahgeological survey. (thread)

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Did you know that you can use land surface roughness to map out landslides? See this thread for tools and methods to do just that in #python. These are the results from a 6 month @NSF funded internship I conducted at the @utahgeological survey. (thread)https://abs.twimg.com/emoji/v2/... draggable=

@SeanLahusen and Adam Booth (PSU) have written extensively on this topic. And Matteo Berti wrote an excellent review article on the subject: https://www.sciencedirect.com/science/article/pii/S0169555X12004862">https://www.sciencedirect.com/science/a...

Comparative analysis of surface roughness algorithms for the identification of active landslides

Parameters correlated to surface roughness are quite commonly used to describe landslide activity in quantitative geomorphology. Previous studies prov…

https://www.sciencedirect.com/science/article/pii/S0169555X12004862

My goal while at the @utahgeological survey was to leverage the extensive #Lidar datasets within the state to test different methods of measuring roughness and machine learning approaches to classifying rough topography as landslide or not landslide.

I settled on using several different approaches to measuring land surface roughness:
1) standard deviation of slope
2) root-mean squared height
3) continuous wavelet transform
3) directional cosine eigen vector

Figure below is roughness map of landslides in Utah.

Using the Receiver Operating Characteristic (ROC) curve, I was able to properly classify landslide terrain at >70% effectiveness (correctly identified), see example ROC curve below.

All of the code to run through and calculate land surface roughness, and classify landslides can be found here:

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https://github.com/utah-geological-survey/RuffSurfFinder
Its">https://github.com/utah-geol... all written in Python and has a reasonably sized manual. Take a look if #landslides, #lidar, or #python are up your alley.

utah-geological-survey/RuffSurfFinder

Set of codes built by Matthew Morriss to measure surface roughness - utah-geological-survey/RuffSurfFinder

https://github.com/utah-geological-survey/RuffSurfFinder

This project was supported by the @NSF #Intern program, which I cannot recommend highly enough. I know several other students who& #39;ve taken part and recommend you to look into it if it sounds right for you: https://www.nsf.gov/pubs/2021/nsf21013/nsf21013.pdf">https://www.nsf.gov/pubs/2021...

Also this thread comes full circle, as I learned about the program 1.5 years ago from @SedimentStarved on twitter! During my 6 months @utahgeological, I made connections throughout the State and found a career opportunity with the @USGS_UT. A great and successful program!

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