Inspection method
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The common Inspection method (what should be done and how?)
ISO 19105:2000(E) Geographic information — Conformance and testing, specifies the framework, concepts and methodology for testing and criteria to be achieved to claim conformance of a data set. A first step of any data conformance testing relates to "managing the requirements".
- The functional requirements of an LPIS are laid down in the Regulations and were translated into the LPIS Core Model (LCM).
- The high-level quality expectations regarding LPIS data are described in a discussion document
These two documents form the basis for the two test suites: Abstract Test Suite (ATS) and Executive Test Suite (ETS), as illustrated by this simplified Conformance assessment process overview
The inspection process involves three activities.
- at the start, produce a Feature Catalogue of the Implementation Under Test (IUT). This defines and clarifies data types and the relationships amongst them.
- perform an initial ATS. The ATS allows for the verification of model conformance of the LPIS implementation under test through a set of abstract tests.
- run an ETS annually to inspect the continued ability of the LPIS data to unambiguously geographic locate agriculture fields and to quantify the area of eligible land. The ETS operates on measures for the seven prime quality elements.
ATS, ETS and quantitative spatial data quality elements
ISO 19113:2002(E) establishes the principles for describing the quality of geographic data and specifies components for reporting quality information. It also provides an approach to organizing quantitative information in five data quality elements. If one tentatively maps how these five are addressed in either test suite, the results could look like:
The Abstract Test Suite tests model conformity, i.e.
- logical consistency: the degree of adherence to logical rules of data structure, attribution and relationships (compared to the LCM)
- completeness; presence and absence of features, their attributes and relationships
The LCM ATS describes the applicable tests to verify whether your LPIS was designed correctly.
The Executable Test Suite (ETS) manages the inspection of the actual (LPIS) data values for:
- thematic accuracy: accuracy of quantitative attributes and the correctness of non-quantitative attributes and of the classifications of features and their relationships.
- temporal accuracy: in particular temporal validity or validity of data with respect to time
- completeness: presence and absence of features, their attributes and relationships.
in accordance with the instructions and guidelines of the quality framework set in ISO 19114, 19113 and ISO/TS 19138.
These ETS activities are performed within three phases:
- sampling: Sample pre-selection
- inspection: ETS
- reporting: ETS result analysis
The Commission Regulation 2010R146 calls for an annual report to be produced and delivered to the Commission upon completion of the ATS and ETS inspections. The report allows the MS to convey its findings to the European Commission. It holds a predefined mandatory data part and a conditional textual part.
Go forward to Initial ATS Conformance Testing to see the details.
Go backwards to Table of contents.
