Additional Information

From Wikicap - European Commission

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The quality assessment is based on a sample of a delivered LPIS population and from 2015 EC services are responsible of both the sample selection and the images provision. Sample selection are based on industry standard sampling plan following ISO 2859-2 standards. Upon reception of the population in the lot of reference parcels and availability of all necessary imagery, a subset of items (reference parcels) for quality assessment will be returned to the MS. This subset or “sample pre-selection” will on purpose be bigger than the minimum corresponding sampling needed in order to overcome the skipping of parcels due to technical issues.

The TG ETS procedures describe how to process the subsets and item substitution based on the ground situation and some historic conditions that influence suitability for inspection.

  • when local technical image conditions prevent a clear inspection, a pre-selected reference parcel can be skipped (ie. for technical reason such as incomplete LUI coverage by the image). The parcels that are not skipped are fit for inspection.
  • when local cropping conditions prevent the delineation of a particular segment of a reference parcel, such reference parcels can be either flagged as not fit for measurement or subject to the parcel aggregation variant, using a new, aggregated item of inspection.

The application of the parcel aggregation variant is systematic: if applied, it needs to be applied to all reference parcels where to conditions are right and is optional unless the rate of parcels "not fit for measurement" is expected to exceed 50% from past experiences.

Adjudication of landscape features, skipping of items or parcel aggregation for measurement are all temporary actions and qualities that persist only during the context of the ongoing quality assessment.


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