Mdenoise is an denoising algorithm for topographic use that preserves sharp edges. It's part of GDAL, so I was wondering if it maybe was integrated in FME, but under another name? Or is there an transformer that works in a similar way?
Some background to mdenoise:
https://personalpages.manchester.ac.uk/staff/neil.mitchell/mdenoise/
@aron You could try TINGenerator with breaklines (if you have them) or the PointCloudSimplifier . Or you can run the mdenoise exe using the SystemCaller as you can do in GRASS GIS.
I don't think mdenoise is a GDAL applicaiton. They are just suggesting using GDAL to convert any DEMs you have to the support grid format - Esri ASCII GRID. which FME can do of course.