Notation	Name	Description	Status
chaotic	Chaotic (City centre with high and low-rise buildings)	Centres of large towns with mixture of low-rise and high-rise...	stable
closed	Closed (Regular large obstacle COVER (suburb, forest))	Landscape totally and quite regularly covered with similar si...	stable
inapplicable	inapplicable	None of the codes in the table are applicable in the context ...	stable
open	Open (Open flat terrain; grass, few isolated obstacles)	Level country with low vegetation (e.g. grass) and isolated o...	stable
rough	Rough (High crops; scattered obstacles, 15 < x/H < 20)	Recently-developed 'young' landscape with high crops or crops...	stable
roughlyOpen	Roughly open (Low crops; occasional large obstacles, x/H > 20)	Cultivated area with regular cover of low crops, or moderatel...	stable
sea	Sea (open water, tidal flat, snow with fetch above 3 km	Open sea or lake (irrespective of the wave size), tidal flat,...	stable
smooth	Smooth (Mud flats, snow; no vegetation, no obstacles)	Featureless land surface without any noticeable obstacles and...	stable
unknown	unknown	The surface roughness is unknown.	stable
veryRough	Very rough (Parkland, bushes; numerous obstacles, x/H ~ 10)	'Old' cultivated landscape with many rather large obstacle gr...	stable