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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 08:52:50 -0700
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
>