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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. HDF-OPeNDAP Tutorial Outline. Why OPeNDAP? OPeNDAP Client Tools Visualization and Analysis OPeNDAP Servers
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Using visualization tools to access HDF data via OPeNDAP Joe Lee and Kent Yang The HDF Group The 13th HDF and HDF-EOS Workshop November 3-5, 2009 HDF/HDF-EOS Workshop XIII
HDF-OPeNDAP Tutorial Outline • Why OPeNDAP? • OPeNDAP Client Tools • Visualization and Analysis • OPeNDAP Servers • Viewing Data with Panoply HDF/HDF-EOS Workshop XIII
Why So Difficult? • Getting and Listening to MP3 song • Yesterday - Beatles • Getting and Viewing HDF-EOS dataset • Yesterday’s Ozone - OMI HDF/HDF-EOS Workshop XIII
Mirador – Data Access Made Simple HDF/HDF-EOS Workshop XIII
Access HDF via FTP/HTTP All I want is x-region data but data is missing. Aura Users All I want is adataset, not the entire file. Tool (IDL) OMI FTP FTP / HTTP Clients FTP / HTTP Servers HDF Files Local HDF Files HDF/HDF-EOS Workshop XIII
Why MP3? 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! HDF/HDF-EOS Workshop XIII
OPeNDAP Concept Typical Remote Access View Data (User) OPeNDAP client Visualization Tools Visualization tools (e.g. grads) Remote Data (HDF4/5) Local Data (HDF4/5) FTP Server OPeNDAP Server FTP Client File Transfer Protocol (FTP) via Internet Data Access Protocol (DAP) via Internet HDF/HDF-EOS Workshop XIII
Access HDF via FTP/HTTP Aura Users HDF Tool OMI FTP/HTTP FTP / HTTP Clients FTP / HTTP Servers HDF Files Local HDF Files HDF/HDF-EOS Workshop XIII
Access HDF via OPeNDAP Aura Users OMI DAP OPeNDAP Client Tool OPeNDAP Servers HDF Files HDF/HDF-EOS Workshop XIII
OPeNDAP – Why Not? HDF/HDF-EOS Workshop XIII
How to Enjoy HDF via OPeNDAP How to Enjoy MP3 MP3 HDF via OPeNDAP Install OPeNDAP tool Search web for data View data • Install MP3 player • Search web for MP3 • Listen to your MP3 HDF/HDF-EOS Workshop XIII
OPeNDAP Tools Panoply GrADS IDV IDL NCL ODC Ferret 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/ HDF/HDF-EOS Workshop XIII
Install Panoply • http://www.giss.nasa.gov/tools/panoply/ • Java 5 Runtime Environment HDF/HDF-EOS Workshop XIII
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 XIII
Search Web for OPeNDAP Data • Pick the Date • Select & Copy the DATA URL (Ctrl-C) HDF/HDF-EOS Workshop XIII
View Data • Start Application • Enter URL (Album) • Pick Dataset (Track) • Set Projection (Equalizer) • Enter Lat / Lon (FF/REW) HDF/HDF-EOS Workshop XIII
Examples and Demo Pages HDF/HDF-EOS Workshop XIII
Thank You! • More Tools Examples:http://hdfeos.org/software/idv.phphttp://hdfeos.org/examples/using_grads.php • More Demo Servers and Data:http://hdfgroup.org/projects/opendaphttp://hdfgroup.org/projects/opendap4 HDF/HDF-EOS Workshop XIII
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. HDF/HDF-EOS Workshop XIII
Questions/comments? HDF-EOS to MP3? Earth Music?? HDF/HDF-EOS Workshop XIII