+ int get_cloud_layer_coverage_type (int index) const;
+ void set_cloud_layer_coverage_type (int index, int type );
+ double get_cloud_layer_visibility_m (int index) const;
+ void set_cloud_layer_visibility_m (int index, double visibility_m);
+ double get_cloud_layer_maxalpha (int index ) const;
+ void set_cloud_layer_maxalpha (int index, double maxalpha);