doha

Hi Rogier, thanks very much for your response. I am interested in learning more about how the most significant cells are chosen, in order to inform my roughness map creation process. Is this selection process described in more detail anywhere?

Hi all, I have been investigating how large roughness maps are processed on WAsP, and have found the following two paper which describe some aspects of how the roughness rose is generated: https://wes.copernicus.org/articles/6/1379/2021/wes-6-1379-2021.html https://wes.copernicus.org/articles/3/353/2018/wes-3-353-2018.pdf I now understand that WAsP simplifies large roughness maps with many roughness changes into a roughness rose, and that each sector of this rose has a maximum of 10 roughness changes by default. I have also observed that a great amount of simplification is involved, as I have personally tested large roughness maps with more than 10 roughness changes in a given sector and seen resulting roughness roses with at most 5 changes in any sector. I have not found a detailed description of how the roughness changes used on the roughness rose are chosen or how WAsP simplifies or averages several roughness changes on the original roughness map into one roughness value on the corresponding section of the roughness rose. Does such a description exist anywhere?