a system for calculating the state of condition is integrated into naturtyper i norge in this system a number of relevant disturbance factors and appurtenant variables have been defined all variables have a number of levels defined by a state index the description of the system is only available in norwegian these states indices can most likely also work as threshold values between disturbance levels but so far this has not been a specified objective for this system and no statistics are available for degraded land in this system theoretically such stageslevels can be mapped on any scale and further used to calculate progress of restoration but this requires large resources and most likely only relevant for specific purposes like for specific nature types restricted geographic areas or specific restoration priorities the nature index ni is a different approach to describe levels of disturbance nybp etai