Transcript The HDF Group 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.

The HDF Group
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
November 3-5, 2009
HDF/HDF-EOS Workshop XIII
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HDF-OPeNDAP Tutorial Outline
• Why OPeNDAP?
• OPeNDAP Client Tools
o Visualization and Analysis
• OPeNDAP Servers
• Viewing Data with Panoply
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Why So Difficult?
• Getting and Listening to MP3 song
o Yesterday - Beatles
• Getting and Viewing HDF-EOS dataset
o Yesterday’s Ozone - OMI
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Mirador – Data Access Made Simple
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Access HDF via FTP/HTTP
Users
Tool (IDL)
All I want is x-region data but data is
missing.
Aura
All I want is a dataset, not the entire file.
OMI
FTP
Local HDF
Files
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FTP / HTTP
Clients
FTP / HTTP
Servers
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Why
Why
OPeNDAP?
MP3?
• 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!
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OPeNDAP
Concept
Typical
Remote
Access
OPeNDAP
Visualization
client
Visualization
View
tools
Data
(e.g.
(User)
Tools
grads)
Remote Data
(HDF4/5)
Local Data
(HDF4/5)
OPeNDAP
FTP
Server
FTP Client
Data
File Transfer
Access Protocol (DAP)
(FTP) via Internet
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Access HDF via FTP/HTTP
Aura
Users
HDF Tool
OMI
FTP/
HTTP
Local HDF
Files
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FTP / HTTP
Clients
FTP / HTTP
Servers
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Access HDF via OPeNDAP
Aura
Users
OMI
DAP
OPeNDAP
Client Tool
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OPeNDAP
Servers
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OPeNDAP – Why Not?
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How toHow
Enjoy
to HDF
Enjoyvia
MP3
OPeNDAP
MP3
HDF via OPeNDAP
1. Install MP3 player
1. Install OPeNDAP tool
2. Search web for MP3
2. Search web for data
3. Listen to your MP3
3. View data
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OPeNDAP Tools
1.
2.
3.
4.
5.
6.
7.
8.
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/
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Install Panoply
• http://www.giss.nasa.gov/tools/panoply/
• Java 5 Runtime Environment
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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
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Search Web for OPeNDAP Data
• Pick the Date
• Select & Copy the DATA URL (Ctrl-C)
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View Data
•
•
•
•
•
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Start Application
Enter URL (Album)
Pick Dataset (Track)
Set Projection (Equalizer)
Enter Lat / Lon (FF/REW)
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Examples and Demo Pages
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The HDF Group
Thank You!
• 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
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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.
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The HDF Group
Questions/comments?
HDF-EOS to MP3?
Earth Music??
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