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Re: Point data netCDF example & description

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  • Subject: Re: Point data netCDF example & description
  • Date: Fri, 19 Dec 2008 10:23:30 -0600
Hello John,

Thanks for the feedback and suggested modifications for the station time series convention draft for WCS.

Kari, Would you mind reconciling our current point WCS-implementation with John's suggestions. At the minimum we would like to be consistent in the packaging of the point data by Unidata THREDDS. After that we can interact with the Airnow crew so that their WCS/STS is also done the same way.

Thanks again,
Happy Holidays!
Rudy


On Fri, Dec 19, 2008 at 9:52 AM, John Caron <address@hidden> wrote:
Hi Rudy:

This is the proposed conventions that we will use:

 http://cf-pcmdi.llnl.gov/trac/wiki/PointObservationConventions

Its not official yet, so things may change in it. We do not yet have any WCS services that use this, but we are working on this now.

The file i downloaded from your service would satisfy this convention with the following changes to the global attributes:

 :Conventions = "CF-1.5";  (it may be in 1.5 or later, have to wait and see)
 :CF\:featureType = "Point"; (was CF\:pointFeature)

as i said, this convention has not yet been adopted, so there may be some adjustments for the final version.

very cool service, thanks for the info.

Rudolf Husar wrote:
> Hi John,
>
> You may recall that couple of years ago we adopted a semi-standard
> implementation of the WCS for point data and used internally for our
> datasets in DataFed.  This would be a good time to revisit and
> compare/reconcile with your approach. Here are links to a typical point
> dataset.
>
> AQS_d daily point monitoring dataset viewed in DataFed browser
> http://webapps.datafed.net/datafed.aspx?dataset_abbr=AQS_D
>
> WCS Access Front Page
> http://webapps.datafed.net/wcs_query.aspx?dataset_abbr=AQS_D&view_id=map&param_abbr=pm25&datetime=2007-05-27T00:00:00&lat_min=24&lat_max=52&lon_min=-130&lon_max=-65
> <http://webapps.datafed.net/wcs_query.aspx?dataset_abbr=AQS_D&view_id=map&param_abbr=pm25&datetime=2007-05-27T00:00:00&lat_min=24&lat_max=52&lon_min=-130&lon_max=-65>
>
> WCS GetCoverage that returns a netCDF-table
> http://webapps.datafed.net/ogc_EPA.wsfl?SERVICE=WCS&REQUEST=GetCoverage&VERSION=1.0.0&CRS=EPSG:4326&COVERAGE=AQS_D.pm25&TIME=2007-05-27T00:00:00&BBOX=-130,24,-65,52,0,0&WIDTH=-1&HEIGHT=-1&DEPTH=-1&FORMAT=NetCDF-table
> <http://webapps.datafed.net/ogc_EPA.wsfl?SERVICE=WCS&REQUEST=GetCoverage&VERSION=1.0.0&CRS=EPSG:4326&COVERAGE=AQS_D.pm25&TIME=2007-05-27T00:00:00&BBOX=-130,24,-65,52,0,0&WIDTH=-1&HEIGHT=-1&DEPTH=-1&FORMAT=NetCDF-table>
>
> Would you mind dropping me a pointer to your point data encoding in
> netCDF for WCS 1.? Example WCS GetCoverage that returns your point netCDF?
>
> Regards
>
> Rudy
>



--
Rudolf B. Husar, Professor and Director
Center for Air Pollution Impact and Trend Analysis (CAPITA),
Washington University,
1 Brookings Drive, Box 1124
St. Louis, MO 63130
314 935 6099