TG IXIT Data scope
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For the creation and upkeep of an LPIS, several important choices about data sources and stakeholder roles have been made. These choices have a profound impact on the priorities, the structure, the operational strengths and potential weaknesses of the operational system.
ISO standards on geographical information would usually attribute this type of information to the LINEAGE component of metadata, but since the LPIS QA requires a correct and complete understanding of these choices, a structured way for documentation is required. Furthermore the method for the conformance testing under LPIS QA is verification testing which implies rigorous proofs of correctness to demonstrate conclusively and exhaustively any stated conformance of an implementation.
This annex X or TG IXIT provides the structured way to find and report the required lineage metadata.
There are two other LPIS QA information components that describe choices and lineage regarding the IUT but that are not in scope of the TG IXIT.
- The eligibility profile which provides an LCML -compatible catalogue of the land cover classes deemed eligible by the LPIS custodian. The eligibility profile methodology and format are described in Annex III of the TG ETS.
- MTS 2.0 involves other implementation and source dataset metadata, which is sufficiently structured by the INSPIRE implementing rules on metadata and the relevant data specifications. This metadata is part of the core TG MTS, but outside the scope of the Implementation Conformance Statement (ICS).
The IXIT probes into eight implementation option that any LPIS custodian must have made at a certain point to address the choices or options offered by the Regulations. As a result, the outcome of IXIT is simple a set of 8 qualifiers (nouns or adjectives).
The eight choices relate to:
- A - The author/actor of the primary boundary of the reference parcel. The primary boundary or perimeter represents the spatial extent of land corresponding to the reference parcel identifier. The outcome defines the reference parcel type; note that a “basic property unit” (BPU) has been introduce to be in line with the INSPIRE glossary.
- B - The process that lead to the delineation of the borders of the agricultural land to be used as maximum eligible area.
- C - The way the eligible landscape feature, if applicable, have been adjudicated to the reference parcel.
- D - The processing of the spatial themes above to assemble a maximum eligible area for each individual reference parcel perimeter.
- E - The application of pro rata reduction of permanent grasslands (PG) with scattered ineligible features.
- F - The validation and documentation of the required positional accuracy requirements.
- G – How does the SUT determine the amount of eligible hectares per RP that are actually available for direct area payment application.
- H – The status of implementation of the geospatial aid application.
The method to find the correct choices made is by answering the polychotomy questionnaire in the next chapter; for each of the eight topics, one and only one answer should emerge.
Although we do not expect that not all combination of answers can actually occur, e.g. a “CP” type reference parcel perimeter is unlikely not come with “freehand” drawn borders, no business rules have yet been implemented. Each of the eight qualifiers operates in full independence.
In the questionnaire,
- extracts from the regulation are “quoted in italic”
- answers for the topic are “quoted bold underline”
- referrals to subsequent questions are indicated as -> qn
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