HDF and HDF-EOS Workshop XIX (2016) Ed Armstrong

1. Pilot Project for HDF5 Metadata
Structures for SWOT
Ed Armstrong and Steve Hughes
NASA Jet Propulsion Laboratory
2016 Summer ESIP Meeting
July 19, 2016
National Aeronautics and
Space Administration
Jet Propulsion Laboratory
California Institute of Technology
Pasadena, California
© 2016 California Institute of Technology.
Government sponsorship acknowledged.

2. 2016 ESIP Summer Meeting
 First NASA mission to incorporate granule level ISO 19115-2
metadata attributes
 HDF5 Metadata Groups
 Produced via two methods
 Level 2: XML serialization (XML bindings in software)
 Level 3 and 4: XML style sheets conversions
 Essential Metadata Attributes (Required and Recommended)
 Both Series (Collection) and Dataset (Granule) level
 Examples: Space/Time. Production and distribution attribution.
Processing lineage. Versioning history. Abstract.
SMAP Metadata Review

3. 2016 ESIP Summer Meeting
 HDF5 structure and metadata layout and the Essential Attributes in
the ISO Metadata Model
 Plan
 From the SWOT Information Archtecture (IA) and Use Cases, start
capturing the Essential Attributes in the ISO Metadata Model into a
knowledge representation framework.
 Stage the Essential Attribute information in the framework for
design analysis, write specification documents for users, and write
metadata snippets for the HDF5 structure. This work will focus on
identifying the thin “top-level ontology” in the SWOT IA.
 Extraction of the metadata to the framework.
 Generate a specification document (e.g. Data Dictionary) for the
metadata.
 Generate example metadata snippets appropriate for the HDF5 structure
SWOT Metadata Pilot Project

4. 2016 ESIP Summer Meeting
 Exercise HDF Product Designer
 Create HDF5/JSON representations of metadata
contents
 Import into Product Designer
 Export snippets to ISO 19115
 Product Designer leverages the THREDDS ISO service
 Review and iterate
 TBD: Writing ISO metadata to HDF5
 Timeline: Next two months
HDF5 Metadata snippets