SlideServe
Télécharger Obtenir Pro
Menu
Accueil Pro
Préférences
ApparenceLight Aide et commentaires
© SlideServe · v2026

Advancements in Accessing HDF5 Datasets through OPeNDAP: Status and Future Directions

owena avatar
owena
18 diapositives · 309 Views · Aug 20, 2014

This presentation discusses recent developments in accessing HDF5 datasets through OPeNDAP. It addresses previous limitations, including incomplete mapping and documentation issues, and highlights improvements in the HDF5-OPeNDAP server and client functionalities. The presentation outlines the current status, incorporating new features for mapping compound data types to DAP structures and the testing of various OPeNDAP clients with HDF-EOS5 data. Future plans emphasize the need for user feedback and additional enhancements to support a wider array of HDF5 features.

#advancements in accessing hdf5 datasets through opendap: status and future directions #advancements in accessing hdf5 datasets through opendap: status and future directions ppt #powerpoint #presentation
Advancements in Accessing HDF5 Datasets through OPeNDAP: Status and Future Directions - slide 1
01 / 18Advancements in Accessing HDF5 Datasets through OPeNDAP: Status and Future Directions
1 / 17

Télécharger la présentation

Advancements in Accessing HDF5 Datasets through OPeNDAP: Status and Future Directions
Une image / un lien ci-dessous est fourni (tel quel) pour télécharger la présentation

Politique de téléchargement : le contenu du site vous est fourni TEL QUEL pour votre information et votre usage personnel ; il ne peut être vendu, concédé sous licence ni partagé sur d’autres sites sans l’accord de son auteur.Le contenu vous est fourni TEL QUEL, pour votre information et votre usage personnel uniquement. Téléchargez la présentation en cliquant sur ce lien. Lors du téléchargement, si vous ne parvenez pas à télécharger une présentation, l’éditeur a peut-être supprimé le fichier de son serveur.Pendant le téléchargement, si vous ne parvenez pas à obtenir une présentation, le fichier a peut-être été supprimé par l’éditeur.

F I N

Plus de contenu associé

Transcription de la présentation

  1. Software to access HDF5 Datasets via OPeNDAP MuQun Yang, Hyo-Kyung Lee The HDF Group HDF and HDF-EOS Workshop XI, Landover, MD

  2. Previous work review HDF5-OPeNDAP server: • Incomplete mapping from HDF5 to OPeNDAP • No comprehensive test suite • Only tested a few examples on two platforms • Incomplete documentation HDF5-OPeNDAP client: • No client at all HDF and HDF-EOS Workshop XI, Landover, MD

  3. Previous HDF5-OPeNDAP Support HDF5 DAP Prototyped Server No Client HDF and HDF-EOS Workshop XI, Landover, MD

  4. Proposed work First Year HDF5 HDF5 server Clients: Matlab etc. DAP HDF and HDF-EOS Workshop XI, Landover, MD

  5. Current Status HDF5 HDF5 server Clients: Matlab etc. DAP HDF and HDF-EOS Workshop XI, Landover, MD

  6. HDF and HDF-EOS Workshop XI, Landover, MD

  7. HDF5 Server Status – New Features • Mapping Compound datatype to DAP Structure • *Mapping EOS Grid to DAP Grid • *Mapping HDF5 group to DAP • *Mapping HDF5 object and regional references to DAP DONE HDF and HDF-EOS Workshop XI, Landover, MD

  8. HDF5 Server Status - Test • Code Cleanup – updating to the latest version of HDF5 • Comprehensive testsuite – DejaGNU • Internal Aura EOS file testsuite • Inside OPeNDAP’s nightly build system DONE HDF and HDF-EOS Workshop XI, Landover, MD

  9. HDF5 Server Status – Special Support • Partial Support of CF conventions • Relative Object Path Support • Configuration Options • HDF5-OPeNDAP handler Website DONE HDF and HDF-EOS Workshop XI, Landover, MD

  10. HDF5 Server Status - Documentation • Mapping HDF5 group to DAP -- Done! • Limitations of HDF5-OPeNDAP handler – In progress! • Mapping Object reference to DAP – In Progress! • Experiments with OPeNDAP clients – In Progress! In Progress ! HDF and HDF-EOS Workshop XI, Landover, MD

  11. Using OPeNDAP Clients to serve HDF5 data • Matlab Client – in progress • Testing OPeNDAP Clients to read NASA HDF-EOS5 files • Ferret • ncBrowse • IDV • ODC • GrADS HDF and HDF-EOS Workshop XI, Landover, MD

  12. Several Highlights • HDF5-OPeNDAP Handler Website • Limitations of the current handler • Demo: Visualizing HDF-EOS5 Aura data with existing OPeNDAP clients • Limitations of the existing clients HDF and HDF-EOS Workshop XI, Landover, MD

  13. HDF5 OPeNDAP Website • URL: http://hdfdap.hdfgroup.uiuc.edu:8080/ HDF and HDF-EOS Workshop XI, Landover, MD

  14. Limitations of the handler • No support for HDF5 files that have a '.' inside a group/dataset name • No support for any variable length types except for 1 dimensional variable-length string array • No support for ENUM,BITFIELD,OPAQUE types • 64 bit integer (array) is not supported • Both signed and unsigned char map to Byte HDF and HDF-EOS Workshop XI, Landover, MD

  15. Demo • Ferret • NCBrowser • IDV HDF and HDF-EOS Workshop XI, Landover, MD

  16. Summary of accessing Aura L3G Data via OPeNDAP clients HDF and HDF-EOS Workshop XI, Landover, MD

  17. Second year Plan • High-level HDF5 client • Working with GrADS team • We really would like to hear feedbacks from Users Please send emails to ymuqun@hdfgroup.org hyoklee@hdfgroup.org HDF and HDF-EOS Workshop XI, Landover, MD

  18. Acknowledgement • This work was supported basing upon the Cooperative Agreement with the National Aeronautics and Space Administration (NASA) under NASA grant NNX06AC83A and NNX06AG75A.  Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of NASA.  HDF and HDF-EOS Workshop XI, Landover, MD 18