1. www.hdfgroup.org The HDF Group November 3-5, 2009HDF/HDF-EOS Workshop XIII1 Using visualization tools to access HDF data via OPeNDAP Joe Lee and Kent Yang The HDF Group The 13 th HDF and HDF-EOS Workshop November 3-5, 2009

2. www.hdfgroup.orgNovember 3-5, 2009HDF/HDF-EOS Workshop XIII2 HDF-OPeNDAP Tutorial Outline Why OPeNDAP? OPeNDAP Client Tools o Visualization and Analysis OPeNDAP Servers Viewing Data with Panoply

3. www.hdfgroup.org Why So Difficult? Getting and Listening to MP3 song o Yesterday - Beatles Getting and Viewing HDF-EOS dataset o Yesterday’s Ozone - OMI HDF/HDF-EOS Workshop XIII3November 3-5, 2009

4. www.hdfgroup.org Mirador – Data Access Made Simple HDF/HDF-EOS Workshop XIII4November 3-5, 2009

5. www.hdfgroup.org Access HDF via FTP/HTTP November 3-5, 2009HDF/HDF-EOS Workshop XIII5 Users FTP / HTTP Clients Tool (IDL) FTP / HTTP Servers HDF Files OMI FTP Local HDF Files Aura All I want is a dataset, not the entire file. All I want is x-region data but data is missing.

6. www.hdfgroup.orgNovember 3-5, 2009HDF/HDF-EOS Workshop XIII6 Why OPeNDAP? MP3 over CD Pick one song, not album (Quick) Listen now and Buy later (Right) OPeNDAP over FTP/HTTP Pick one dataset, not file (Quick) View now and Download later (Right) Benefit: Save Time and Resource! Why MP3?

7. www.hdfgroup.org Remote Data (HDF4/5) File Transfer Protocol (FTP) via Internet FTP Server FTP Client Local Data (HDF4/5) Data Access Protocol (DAP) via Internet OPeNDAP Server View Data (User) OPeNDAP Concept 7 OPeNDAP client Visualization Tools Typical Remote Access Visualization tools (e.g. grads) November 3-5, 2009HDF/HDF-EOS Workshop XIII

8. www.hdfgroup.org Access HDF via FTP/HTTP November 3-5, 2009HDF/HDF-EOS Workshop XIII8 Users FTP / HTTP Clients HDF Tool FTP / HTTP Servers HDF Files OMI FTP/ HTTP Local HDF Files Aura

9. www.hdfgroup.org Access HDF via OPeNDAP November 3-5, 2009HDF/HDF-EOS Workshop XIII9 Users OPeNDAP Servers HDF Files OMI DAP OPeNDAP Client Tool Aura

10. www.hdfgroup.org OPeNDAP – Why Not? HDF/HDF-EOS Workshop XIII10November 3-5, 2009

11. www.hdfgroup.org How to Enjoy MP3 MP3 1.Install MP3 player 2.Search web for MP3 3.Listen to your MP3 HDF via OPeNDAP 1.Install OPeNDAP tool 2.Search web for data 3.View data HDF/HDF-EOS Workshop XIII11 How to Enjoy HDF via OPeNDAP November 3-5, 2009

12. www.hdfgroup.org OPeNDAP Tools HDF/HDF-EOS Workshop XIII12 1.Panoply 2.GrADS 3.IDV 4.IDL 5.NCL 6.ODC 7.Ferret 8.ncBrowse http://www.giss.nasa.gov/tools/panoply/ http://www.iges.org/grads/ http://www.unidata.ucar.edu/software/idv/ http://www.ittvis.com/ProductServices/IDL.aspx http://www.ncl.ucar.edu/ http://opendap.org/ODC/ http://ferret.wrc.noaa.gov/Ferret/ http://www.epic.noaa.gov/java/ncBrowse/ November 3-5, 2009

13. www.hdfgroup.org Install Panoply http://www.giss.nasa.gov/tools/panoply/ Java 5 Runtime Environment HDF/HDF-EOS Workshop XIII13November 3-5, 2009

14. www.hdfgroup.org Search Web for Data Open Web Browser Search omi opendap (or Enter URL) http://acdisc.gsfc.nasa.gov/opendap/ (http://www.hdfgroup.org/projects/opendap4/opendap4_demo.html) (Click HDF-EOS5) (Click Aura OMI Level 3) Click OMTO3d.003 HDF/HDF-EOS Workshop XIII14November 3-5, 2009

15. www.hdfgroup.org Search Web for OPeNDAP Data Pick the Date Select & Copy the DATA URL (Ctrl-C) HDF/HDF-EOS Workshop XIII15November 3-5, 2009

16. www.hdfgroup.org View Data Start Application Enter URL (Album) Pick Dataset (Track) Set Projection (Equalizer) Enter Lat / Lon (FF/REW) HDF/HDF-EOS Workshop XIII16November 3-5, 2009

17. www.hdfgroup.orgNovember 3-5, 2009 Examples and Demo Pages HDF/HDF-EOS Workshop XIII17

18. www.hdfgroup.org The HDF Group Thank You! November 3-5, 2009HDF/HDF-EOS Workshop XIII18 More Tools Examples: http://hdfeos.org/software/idv.php http://hdfeos.org/examples/using_grads.php More Demo Servers and Data: http://hdfgroup.org/projects/opendap http://hdfgroup.org/projects/opendap4

19. www.hdfgroup.org Acknowledgements This work was supported by cooperative agreement number NNX06AC83A, NNX08AO77A and NNX06AG75A from the National Aeronautics and Space Administration (NASA). Any opinions, findings, conclusions, or recommendations expressed in this material are those of the author[s] and do not necessarily reflect the views of the National Aeronautics and Space Administration. November 3-5, 2009HDF/HDF-EOS Workshop XIII19

20. www.hdfgroup.org The HDF Group Questions/comments? HDF-EOS to MP3? Earth Music?? November 3-5, 2009HDF/HDF-EOS Workshop XIII20