PR Categorizing class reductino coeficient into categories

From Wikicap - European Commission
Jump to: navigation, search

Go up to the main pro rata page

  • Pro rata categories represent groups of land cover classes that share a common value of eligibility rate, even if they may relate to completely different permanent grassland land cover classes.
  • When the sample used for pro rata assessment yields a normal distribution with a low standard deviation, pro rata categories can be determined by:
  • calculating the area weighted mean RC of the sample,
  • applying no reduction when the pro rata RC calculation result is below 10%; full eligibility applies,
  • deducting any result above 10% from 100% and round that difference to the nearest 5.

Example of possible set of eligibility rates is given below:

LC Class observed RC [%] 100-RC Pro rata category Eligibility rate
Class 1 2,2 97,8 Grassland 100%
Class 2 8,9 91,1 Grassland 100%
Class 3 10,6 89,4 Grassland90 90%
Class 4 37,7 62,3 Grassland60 60%
Class 5 42,3 57,7 Grassland60 60%
Class 6 43,9 56,1 Grassland55 55%
Class 7 66,0 44,0 Grassland0 0%
  • By default, if the rate of eligibility drops below 50%, as for class 7 above, the land cover class RC should be set to zero. As an exception, below 50% eligibility grasslands should only be in the eligibility profile if the class is very specific and if the scattering of its ineligible features produces a standard deviation of the RC below 2%. Else, 20% of all class 7 cases would individually have 40% or less grass and imply a quantification error of more than 10%. Therefore, a careful analysis of the standard deviation of the class RC assessment is due.
  • Each of the retained pro rata LC classes has to be inserted in the eligibility profile with its precise definition, detailed description and eligibility rate assessment documentation.

Go up to the main pro rata page