I have an .las file, intended to be a DTM (bare earth) that I generated from a photogrammetry software package that has come out just a bit too lumpy. I now have the license for that software tied up for a long time on the next one, and am looking for tools to smooth out this DTM in ArcGIS. I have harnessed my education as best as I could, from generating a meaned grid with LAS to Raster to using Focal Mean and Focal Minimum, generating a raster to contours and back to raster.
It seems that no matter what I do, how large I make the search area or grid spacing, I can't get rid of the lumps. The area I'm working on is very mountainous, and I believe that to be part of the problem.
Does anyone have any really good tips or tools that might help me out here? I have access to an ArcGIS 10.2 advanced license, Spatial Analyst and 3D Analyst. I also have access to Global Mapper.