more complex NetCDF files

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Jesper Zedlitz

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Jul 8, 2009, 4:44:49 AM7/8/09
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Do we want to support more complex NetCDF files?
I know there is a group working on SWE-common encodings for more complex
observations:
http://www.oostethys.org/ogc-oceans-interoperability-experiment/topics/swecommon/swecommonintro

As an example I took a look at the results of the Argo float project,
which contain vertical profiles:
ftp://ftp.ifremer.fr/ifremer/argo/dac/meds/4900866/4900866_prof.nc

The configuration for this data is of course more complex hat the
configuration we use now. Maybe we should include the structure
definition from the O&M document into our configuration. That would
allow to specify arbitrary complex observation structures.

Additionally we need more detailed information which variable from the
NetCDF belongs to which component of the result. Here is an idea how we
could describe that:
<oostethys-netcdf>
<dimension shortName="N_PROF">
<variable shortName="JULD" ref="time" />
<variable shortName="JULD_QC" ref="time_quality" />
<variable shortName="LON" ref="lon" />
<variable shortName="LAT" ref="lat" />
<dimensionSize shortName="N_LEVELS" ref="profile_size" />
<dimension shortName="N_LEVELS" ref="measurements">
<variable shortName="PRES" ref="pressure" />
<variable shortName="PRES_QC" ref="pressure_quality" />
<variable shortName="TEMP" ref="temperature" />
<variable shortName="TEMP_QC" ref="temperature_quality" />
<variable shortName="PSAL" ref="salinity" />
<variable shortName="PSAL_QC" ref="salinity_quality" />
</dimension>
</dimension>
</oostethys-netcdf>

Jesper

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Dipl.-Inf. Jesper Zedlitz Dept. for Computer Science, CAU of Kiel
Room 1108 Communication Systems Research Group
Phone: +49-(0)431-880-7279
Christian-Albrechts-Platz 4 Fax: +49-(0)431-880-7615
24098 Kiel - Germany j...@informatik.uni-kiel.de

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John Graybeal

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Jul 8, 2009, 11:00:21 AM7/8/09
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Could you be more explicit about what 'support' means? When we talked
about this in the early days of Phase II, the question about more
complicated observing structures was how to represent these (e.g., on
a map). That's sort of a silly offshoot, but it is about how to
display the results effectively. So I am wondering if you have any
thoughts about it, and whether you'd like to include it in the question.

(I think it would be great to support more complex structures within
OOSTethys, and would be an impressive milestone. Particularly nice if
it can be done at low human cost.)

John


John

--------------
John Graybeal <mailto:gray...@mbari.org> -- 831-775-1956
Monterey Bay Aquarium Research Institute
Marine Metadata Interoperability Project: http://marinemetadata.org

Luis Bermudez

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Jul 8, 2009, 12:37:12 PM7/8/09
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Hi Jesper,

The new configuration should allow you to express what you want to expose via SOS. Vertical profiles should be no problem. Did you had problems creating an SOS on top of the argo.nc data ?

-luis
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Luis Bermudez Ph.D.
Coastal Research Technical Manager
Southeastern Universities Research Association (SURA)
berm...@sura.org - Office: (202) 408-8211
1201 New York Ave. NW Suite 430, Washington DC 20005
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