Attribute value update

From Wikicap - European Commission

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Based on the detailed documentation of the anomaly and the analysis of the manifest changes, the reference parcels involved are ready for value updating. In course of value updating the following properties of the reference parcel can be modified:

  • geometric representation,
  • reference area,
  • global and thematic identifier,
  • feature level metadata (comprising life-cycle and validity).

A change of the geometric representation of the parcel may be required by:

  • irreversible conversion of agricultural land (e.g. appearance of forests, water bodies, land abandonment etc.) that are bigger than the minimum mapping unit. Practical considerations and technical recommendations for the implementation of this requirement are given in relevant guidance documents of DG AGRI (DSCG/2014/33) and DG JRC (DS-CDP-2015-10).
  • excluding ineligible objects (permanent man-made constructions),
  • change of the boundary between two reference parcels ,
  • inclusion of additional agricultural land in the area of a single reference parcel.

For the reference parcel feature type topology rules apply. Any new geometry might impact on the neighbouring reference parcels, which in turn, will be subject to update. Therefore, while documenting the anomaly, the identifiers of all affected reference parcels have to be processed. This ensures that the necessary geometric operations are consistently performed from one parcel to another.

The value of the reference area can be updated as a result of:

  • The change in the geometric representation of the parcel
  • Assigning another pro-rata class value to permanent grassland.

Any change in any property value of the reference parcel involves the change of the global unique identifier. The usage of global unique identifiers in LPIS is considered a best IT practice and also allows traceability and subsequent re-verification of the changes. However, LPIS custodian may choose this solution to be in line with generic requirements of the local spatial data infrastructure as it facilitates the life-cycle management of features.

A change of any characteristic element of the reference parcel as a unit of agricultural land should, in the opinion of the EC services, involve the change of the RP ID. However according to best practice solutions the thematic RP-ID should not be “recycled” upon a reassignment of agricultural land between reference parcels transaction, (splitting, merging).

In all cases the feature level metadata, especially those that provide information on life-cycle (“beginLifespanVersion” and “endLifespanVersion” attributes) and/or validity of the parcel (“validFrom”and “validTo”attributes) have to be updated too.

When the new attribute and geometry values have been entered into the system:

  • a processed and documented anomaly has to be and archived,
  • the updated properties of the reference parcel has to be propagated to appropriate other subsystems of IACS (e.g. it should appear in the pre-printed form of declarations).

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