HDF-EOS Workshop IV September 19-21, 2000 Richard E. Ullman ESDIS Information Architect NASA/ GSFC, Code 423

UllmanHDF-EOS Workshop IVPage 2 Workshop IV Goals –Show where we are in application of HDF5 to the HDF-EOS “profile”. –Share progress in development of tools, both commercial and government sponsored that recognize HDF and the HDF-EOS profile of HDF. – Share lessons learned by the Terra Science data producers and others in applying HDF and HDF- EOS to their particular science products. –Collect feedback from HDF-EOS community to help guide our continuing efforts.

UllmanHDF-EOS Workshop IVPage 3 Workshop III Action Status 1. Develop a metadata validator tool to compare metadata to the ECS data model and to the collection descriptor. STATUS: RITSS has developed a stand-alone command line tool called “metcheck” for use by data producers –Alpha today. –Beta in the next month or so.

UllmanHDF-EOS Workshop IVPage 4 Workshop III Action Status 2. Publish metadata policy statements. For example, the policy for deciding when changes to collection level metadata require creation of a new collection. STATUS: A data provider and DAAC issue supported by ECS, not an HDF-EOS issue. –Becoming better understood through experience –A Data Provider’s “Software IRD” in development. –ECS science office is best source for answering questions.

UllmanHDF-EOS Workshop IVPage 5 Workshop III Action Status 3. Provide a link from the HDF-EOS site to the UAH subsetter. STATUS: Done

UllmanHDF-EOS Workshop IVPage 6 Workshop III Action Status 4. Investigate Polar bounding box selection errors in HDF-EOS. Either correct code or correct documentation. STATUS: Done –Some confusion attributed to user misunderstanding. –Code bug found that affected certain selections. Bug fixed.

UllmanHDF-EOS Workshop IVPage 7 Workshop III Action Status 5. Update HDF-EOS web site with presentations, attendance list, etc. STATUS: Always ongoing. –Complete for WS III

UllmanHDF-EOS Workshop IVPage 8 Workshop III Action Status 6. Provide a web site to showcase tools. STATUS: Always ongoing. Links from home page: –“How Do I View HDF-EOS Files?” OS.html –“HDF-EOS Software Information Page/ Review Listed Software and Add New Software” URL under construction.

UllmanHDF-EOS Workshop IVPage 9 Workshop III Action Status 7. Develop a set of suggested attributes (units, scale factors, axis labels) STATUS: DRAFT COMPLETE –The EOS Aura Data Systems Working Group has led this effort –Cheryl Craig will present status later in this workshop.

UllmanHDF-EOS Workshop IVPage 10 Workshop III Action Status 8. Provide a tool to extract information from bit fields. STATUS: No ACTION –So far, we have not noted sufficient interest in this proposed functionality to make implementation a priority.

UllmanHDF-EOS Workshop IVPage 11 Workshop III Action Status 9. Provide better error messages from HDF- EOS. Make the bug tracking and fixing process more open. STATUS: Always ongoing –HDF-EOS library development team will be implementing some improvements in documentation of error codes and implementation in the next revision of HDF-EOS.

UllmanHDF-EOS Workshop IVPage 12 Workshop III Action Status 10. Provide standard definition of HDF4 items using HDF5. That is, how do we use HDF5 to make the identical HDF4 item? STATUS:IN PROGRESS –NCSA (Mike Folk) has produced a paper describing this translation. Bob McGrath will present details later this morning. –A revision of the document will be forthcoming.

UllmanHDF-EOS Workshop IVPage 13 Workshop III Action Status 11. Poll teams about the occurrence of hybrid HDF-EOS/HDF products. What HDF4 primitives are used? STATUS: COMPLETE –Nearly all HDF-EOS products defined to date also contain other HDF object within them. –Transition to HDF-EOS v3 will require attention of the data providers and is likely to take several years.

UllmanHDF-EOS Workshop IVPage 14 Workshop III Action Status 12. Provide a clear schedule and strategy for HDF-EOS using HDF5 with recommendations for data migration and for new application development. STATUS: This Workshop will answer –HDF-EOS 3 is available in Beta today. –We will explain the design and API in the course of this workshop. –Stable release in late winter.