"A22" . . "Non built-up linear features characterized by an artificial and/or impervious cover of hard artificial material, concrete or gravel. Only linear features of more than 3m of width are to be registered." . . "Non built-up linear features" . "Non built-up linear features" . . "Non built-up linear features characterized by an artificial and/or impervious cover of hard artificial material, concrete or gravel. Only linear features of more than 3m of width are to be registered." . . .