Feature extraction for sand dunes and hills using DEM

Question

I want to extract only sand dunes, ridges and hills from a DEM.
Note that there are other elevated objects in the DEM as well and on the mountains and ridges that I don’t want.
Is there any way i can automate or semi- automate.
Currently i have to mark these features manually, which is very laboursome task.
Hill extraction from image can also work for me if i can make a mask of features i require and later use that mask for feature extraction on DEM.

cmrRose · Answer

While I don't have any experience in doing this procedure, I have heard of similar examples. Here are some articles that could help:

(open access) "Automated accuracy assessment for ridge and valley polylines using high-resolution digital elevation models" https://doi.org/10.1130/GES01477.1

(open access) "A GIS add-in for automated measurement of sand dune migration using LiDAR-derived multitemporal and high-resolution digital elevation models" https://doi.org/10.1130/GES01329.1

There are also some articles out there for automated detection of drumlins, another form of hill.

"Automated drumlin shape and volume estimation using high resolution LiDAR imagery (Curvature Based Relief Separation): A test from the Wadena Drumlin Field, Minnesota" https://doi.org/10.1016/j.geomorph.2015.07.020

"An object-oriented approach to automated landform mapping: A case study of drumlins" https://doi.org/10.1016/j.cageo.2011.04.001

Feature extraction for sand dunes and hills using DEM

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