INSPIRE Thematic Clusters

Group activity

  • Dear Jordi, and all I'd like to provide additional information on the CIS 1.1 Coverage model, which allows other encoding than the GML only and also additional Coverage classes as regards the ones in CIS1.0 (= GMLCOV) that is being adopted by...
  • REMINDER - TC #3 Webinar on "Implementation of INSPIRE Coverages"
  • OGC Coverage Implementation Schema (CIS) v1.1 already available
    Comments
    • 160 Views
      Emmanuel DEVYS

      Dear Jordi, and all

      I'd like to provide additional information on the CIS 1.1 Coverage model, which allows other encoding than the GML only and also additional Coverage classes as regards the ones in CIS1.0 (= GMLCOV) that is being adopted by ISO TC211 as 19123-2 Coverage Implementation Schema (CIS 1.0, based on existing ISO 19123).

      This new CIS 1.1 Coverage Implementation schema has been standardized by the OGC on basis of 3 encodings in GML, JSON and RDF, and are based on a new Coverage model (whose UML diagrams are provided in html, or other document formats such as pdf or MS word), which is different from the existing OGC AS topic 6 / ISO 19123:2005 (for which a new project has been started). Figure 16 provides a view of the integration of the previous GridCoverage, RectifiedGridCoverage and ReferenceableGridCoverage (coming from ISO 19123 and GMLCOV, and widely used in INSPIRE data specifications for Coverage-based data), and the parallel emergent (as of CIS 1.1) GeneralGridCoverage and GeneralGrid classes. This new UML Coverage model has not been provided to the OGC nor TC211 in order to secure its consistency (both internal and external with other relevant TC211 standards - such as GFM, CRS, ...). This effort has not been done (up to now) because OGC worked on a implementation standard (CIS 1.1) and UML is only informative. The validation of the new UML model has not been done by OGC (under some AS Topic 6), and not by TC211, as of the revision of 19123-1 project, nor integration in the TC211 HMMG model. Consequently, this CIS 1.1 UML model can't presently be considered as standardized, or the people doing so would do it under their own responsibility.

      As (for the GML encoding) the CIS1.1 schema (based on this new Coverage UML model) as updated/changed some Coverage concepts, the name of classes / elements and even the encoding of the coordinates, the "backward compatibility" has been achieved (in order to solve comments sent during the balloting period by IGN, DGIWG, as well as other stakeholders) by inclusion of CIS1.0 into CIS1.1 (see requirement #1 and conformance clause. In fact, the new CIS1.1 schema is not - by itself - backward compatible with CIS 1.0 schema, and the specifications provides no mapping of CIS1.0 elements to CIS1.1.

      Such a mechanism for backward is acceptable in the XML domain, but might create problems for integration in the TC211 HMMG. Therefore I would strongly recommend to consider that the UML description in this "Coverage Implementation Schema" be considered as not formally validated by OGC nor TC211.

      As a result, in the context of INSPIRE, where specifications and schemas are supposed to be derived from standardized (and validated) UML models, I would urge the involved experts and stakeholders to double-check whether the INSPIRE Coverage model has an interest to upgrade to this new model (that is not available as an EA - or equivalent), and evaluate how the existing data specifications may be upgraded / mapped to the new schemas.

       

      Hoping this helps

  • Discrete Global Grid System (DGGS) Abstract Specification approval
  • Dear members of the cluster, Find below a recent presentation in the INSPIRE Conference 2017 in Strasbourg - "Pushing implementation of European coverage data and services forward", summarizing the main challenges and issues related to... view reply
  • Webinar Implementation of INSPIRE Coverages
  • Webinar “Implementation of INSPIRE Coverages” When: Monday 6th November 2017, 10:30 – 12:00 CET. Where: Online webinar - Connection details: Please, access the following URL on the date and at the...
  • Workshop "Data Cubes for Big Earth Data"
  • Dear members of the cluster, Find below a recent presentation in the INSPIRE Conference 2017 in Strasbourg - "Pushing implementation of European coverage data and services forward", summarizing the main challenges and issues related to... view reply
  • Draft proposals to align implementation of INSPIRE Coverage data to the one foreseen in OGC (OGC-standard coverage data). Misalignments have been identified by the thematic cluster as existing INSPIRE implementation issues. To...
  • Jordi ESCRIU replied on the discussion topic Serving data in multiple CRS using ATOM services
    Dear colleagues, I think that the initial questions / doubts from Oscar Diago are more than answered - If not, please contact me by message through the platform Oscar. Therefore, as Michael suggests, I preceed to close this... view reply
  • Michael LUTZ replied on the discussion topic Serving data in multiple CRS using ATOM services
    Dear Iurie, as you rightly say, we need to be careful with legal interpretations - Only the Court of Justice of the European Union is competent to authoritatively interpret Union law. That said, the INSPIRE Directive is requiring for all data... view reply
  • Iurie MAXIM replied on the discussion topic Serving data in multiple CRS using ATOM services
    Hello, The Note: This Technical Guidance places no requirements on the coordinate reference systems in which data should be made available. Guidance and requirements for coordinate reference systems is given in the thematic Data... view reply
  • Iurie MAXIM replied on the discussion topic Serving data in multiple CRS using ATOM services
    Then we should understand than both the Technical Guidelines and Abstract Test Suite for INSPIRE data specifications that were made according to TGs, must be changed to include these aspects that are not inline with the TGs. Regarding data... view reply
  • Michael LUTZ replied on the discussion topic Serving data in multiple CRS using ATOM services
    Dear Iurie, all, thanks for the detailed summary and pointers to the Atom TG requirements. However, I beg to disagree with your conclusions. It is perfectly fine to publish several representations (or distributions) of a data set (it is even a... view reply
  • Iurie MAXIM replied on the discussion topic Serving data in multiple CRS using ATOM services
    Hello everybody, I. Regarding the topic "Serving data in multiple CRS using ATOM services" .... The TG for INSPIRE Download Services available here is providing several Requirements regarding ATOM and CRS. See chapter... view reply
  • Michael LUTZ replied on the discussion topic Serving data in multiple CRS using ATOM services
    Dear all, I completely agree that it is fine to have othe representations of the data set in the atom feed than the ones conformant with the INSPIRE requirements, e.g. in other formats and/or other CRSs. Best, Michael view reply
  • Jordi ESCRIU replied on the discussion topic Serving data in multiple CRS using ATOM services
    Hi Miroslaw, I totally agree with you. It should not be a problem to have other non-compliant datasets published "aside". Jordi view reply
  • Jordi ESCRIU replied on the discussion topic Serving data in multiple CRS using ATOM services
    Hi Peter, Thank your for your input. You are right - The exemple seems to have only 1 category for http://www.opengis.net/def/crs/EPSG/0/27700 view reply
  • Mirosław MIGACZ replied on the discussion topic Serving data in multiple CRS using ATOM services
    In Poland we published one ATOM service for the theme SU and one for the theme PD. Both of these services have datasets in different formats and CRS: - INSPIRE compliant GMLs in WGS 84 (EPSG: 4258) - not INSPIRE compliant SHPs in our national... view reply
Elevation, Orthoimagery, Reference Systems and Geographical Grids Cluster

Elevation, Orthoimagery, Reference Systems and Geographical Grids Cluster

INSPIRE Thematic Cluster Elevation, Orthoimagery, Reference systems, Geographical grids - Join this group to share your knowkledge, learn and collaborate in solving issues related to the Elevation, Orthoimagery, Reference systems and Geographical grids themes