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.

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Presentation transcript:

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

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

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

Mirador – Data Access Made Simple HDF/HDF-EOS Workshop XIII4November 3-5, 2009

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.

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?

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

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

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

OPeNDAP – Why Not? HDF/HDF-EOS Workshop XIII10November 3-5, 2009

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

OPeNDAP Tools HDF/HDF-EOS Workshop XIII12 1.Panoply 2.GrADS 3.IDV 4.IDL 5.NCL 6.ODC 7.Ferret 8.ncBrowse November 3-5, 2009

Install Panoply Java 5 Runtime Environment HDF/HDF-EOS Workshop XIII13November 3-5, 2009

Search Web for Data Open Web Browser Search omi opendap (or Enter URL) ( (Click HDF-EOS5) (Click Aura OMI Level 3) Click OMTO3d.003 HDF/HDF-EOS Workshop XIII14November 3-5, 2009

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

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

3-5, 2009 Examples and Demo Pages HDF/HDF-EOS Workshop XIII17

The HDF Group Thank You! November 3-5, 2009HDF/HDF-EOS Workshop XIII18 More Tools Examples: More Demo Servers and Data:

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

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