BNO C2: GGOS Committee on
Data and Information Systems
Chair: Nicholas Brown (Australia)
Vice-Chair: Carey Noll (USA)
Until recently, high precision positioning technologies have only been available for professional applications using specialised equipment (e.g. surveying, machine guidance and control track farming). Recent advancements in positioning technologies have enabled mass-market applications to achieve similar accuracies for a fraction of the cost.
GNSS paired with corrections delivered via the Internet or satellite communications, will permit national coverage of positioning services with an accuracy of several centimetres or better. This will open up a wide range of positioning applications for new industries (e.g. intelligent transport systems, location-based services, precision agriculture) and enable existing industries to improve productivity, efficiency, safety and knowledge. To support these new and existing users and maximise the data potential, it is essential that the positioning data, products and services are Findable, Accessible, Interoperable and Reusable (FAIR).
The Committee on Data and Information had two GGOS objective areas:
• Development and implementation of a portal;
• Development and implementation of a metadata scheme
Initial work on the portal was done by Bernd Richter. When he retired, the task was transferred to the GGOS Coordinating Office.
Near term Metadata activity (Carey Noll/CDDIS)
CDDIS is implementing collection-level metadata through the Earth Observation System Data and Information System (EOSDIS) Common Metadata Repository (CMR). CDDIS is an EOSDIS Distributed Active Archive Centers (DAACs) and thus utilizes the EOSDIS infrastructure to manage collection and granule level metadata describing CDDIS archive holdings; these metadata include DOIs associated with the CDDIS archive contents. The CMR is accessible through APIs and can be used in the future by GGOS to find geodetic data and products available through the CDDIS.
Longer-Term Metadata activity (Nicholas Brown/Geoscience Australia
Activities underway at CDDIS:
- Complete collection level metadata related to CDDIS data and product holdings in the EOSDIS Common Metadata Repository (CMR)
- Re-ingest CDDIS data holdings in order to extract granule level metadata linked to these new collection level records
Activities underway on Geodesy Markup Language (GeodesyML)
Geoscience Australia is partnering with a range of international organisations on the following projects to ensure GeodesyML meets user requirements:
1 – Improving the value of Geodetic Products
1.1: Develop and confirm GNSS value chains
• Engage with representatives from all industry sectors to develop GNSS value chain diagrams.
1.2: Identification of gaps in current standards
• To identify and address critical gaps in standards which could inhibit the uptake of precise positioning products.
1.3: Developing and distributing customised GNSS metadata profiles for industry
• Establish detailed, community-specific requirements for FAIR geodetic and positioning metadata and setup a FAIRness compliance test.
• Develop a GNSS metadata profile(s) for specific user sectors.
• Develop education material to explain how user groups can use GNSS metadata profiles.
• Engage with industry to test the GNSS metadata profile(s) for user acceptance.
• Revise GNSS metadata profile(s) based on user feedback.
• Distribute via Geoscience Australia website.
2 – Extension of GeodesyML
2.1: OGC Innovation Program
• Expand the information model of GeodesyML with required metadata for end-users.
• Revise and expand the information model of GeodesyML to ensure the provided precise positioning data is FAIR.
• Investigate applicability of OGC API for provision of precise positioning data to the end-users.
• Supervise improvement of GeodesyML and coordinate these efforts within OGC Innovation Program.
• Development, implementation and testing of GeodesyML against current standard practice
2.2: GeodesyML adopted as a community standard
• Engage with Standards Australia to develop an adoption path for GeodesyML in ISO and OGC.
• Engage with ISO and OGC to propose GeodesyML as a community standard.
Work through ISO and OGC process to respond to changes and suggestions made by ISO and OGC.
(last update 09.2020)