Define new properties for spatial resolution

[andrea-perego]

See https://github.com/SEMICeu/GeoDCAT-AP/issues/15

[andrea-perego]

The option of defining new properties for spatial resolution has been discarded in favour of re-using the DQV-based approach - see https://github.com/SEMICeu/GeoDCAT-AP/issues/15 & related PR https://github.com/SEMICeu/GeoDCAT-AP/pull/54

This PR can therefore be closed.

[dr-shorthair]

Good to see clear proposal for how to apply DQV in this context. I see this style at https://github.com/SEMICeu/GeoDCAT-AP/blob/gh-pages/drafts/latest/examples/quality-measurement.ttl

resource:b23456 dqv:hasQualityMeasurement [ a dqv:QualityMeasurement ;
      sdmx-attribute:unitMeasure <http://www.wurvoc.org/vocabularies/om-1.8/metre> ;
      dqv:isMeasurementOf geodcatap:spatialResolutionAsDistance ;
      dqv:value 100.0 ] .

It depends strongly on a list of quality measures, such as geodcatap:spatialResolutionAsDistance.

In a similar project where we were attempting to describe attribute accuracy, we used oa: to give a textual value for the quality 'dimension' as follows:

  dqv:hasQualityAnnotation [
      a dqv:QualityAnnotation ;
      dqv:inDimension <https://linked.data.qld.gov.au/vocab/dq/AbsoluteExternalPositionalAccuracy> ;
      oa:bodyValue """Polygons 100m; Sites +/- 10m. Positional accuracy of polygons is noted in the field 'L', which is a reliability code and given as either A, B or C for high, moderate and low confidence in accuracy of polygon boundaries. The level is determined on the basis of the reliability of interpretation of photopattern /reflectance of remotely sensed data (aerial photographs and rectified Landsat TM imagery) and on the positioning and frequency of sites and traverses.&#13;
Reliability code is contained in the field 'V' which refer to vegetation attributes - RE (regional ecosystem) and PERCENT accuracy and given as either A, B or C for high, moderate and low confidence in accuracy of polygon attributes.&#13;
&#13;
Logical consistency has been determined through the following:&#13;
All polygons visually checked at 1:100,000 scale and by topological consistency checks.&#13;
A test of consistency for regional ecosystem unit values (RE and PERCENT) between the pre-clearing and remnant coverages.""" ;
    ] ;
  dqv:hasQualityAnnotation [
      a dqv:QualityAnnotation ;
      dqv:inDimension <https://linked.data.qld.gov.au/vocab/dq/CompletenessCommission> ;
      oa:bodyValue "This dataset is to a standard determined as fit for the purpose for which it was collected." ;
    ] ;
  dqv:hasQualityAnnotation [
      a dqv:QualityAnnotation ;
      dqv:inDimension <https://linked.data.qld.gov.au/vocab/dq/CompletenessOmission> ;
      oa:bodyValue "Complete. This dataset contains supporting information to accompany the Regulated Vegetation Management map under the provisions of the Vegetation Management Act 1999. The map incorporates property maps of assessable vegetation current at the time of compilation. This map will be updated on a monthly cycle to ensure property maps of assessable vegetation are shown on the regulated vegetation management map following their certification." ;
    ] ;
  dqv:hasQualityAnnotation [
      a dqv:QualityAnnotation ;
      dqv:inDimension <https://linked.data.qld.gov.au/vocab/dq/ConceptualConsistency> ;
      oa:bodyValue "The data is to a standard determined as fit for the purpose for which it was collected." ;
    ] ;
  dqv:hasQualityAnnotation [
      a dqv:QualityAnnotation ;
      dqv:inDimension <https://linked.data.qld.gov.au/vocab/dq/NonQuantitativeAttributeCorrectness> ;
      oa:bodyValue "The data has been sourced from the regulated vegetation management map and the remnant regional ecosystem mapping and remnant cover mapping version 11.0. Regional ecosystem information for both remnant and high value regrowth vegetation" ;
    ] ;