roughness around the sites and the mast

[Stoyanov]

Dear all,
i`m wondering witch is the best method for assigning the roughness rose for the sites and the meteomast. With map editor to make a contour and to describe the external and internal roughness or with roughness rose for the retain around the mast and another roughness rose around reference site... or both ??? And what is the difference?

[Niels Gylling Mortensen]

In general, we recommend to add roughness change lines to the WAsP map; roughness roses are used mainly for quality assurance of the roughness information in the map. How to make the roughness map is described in the various help files; check also the WAsP Best Practices at http://www.wasp.dk/Support/FAQ.html.