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Re: Point data netCDF example & description



I have updated our service

CF-1.5,  CF:featureType = "point"
http://webapps.datafed.net/ogc_EPA.wsfl?SERVICE=WCS&REQUEST=GetCoverage&VERSION=1.0.0&CRS=EPSG:4326&COVERAGE=AIRNOW.pmfine&TIME=2008-12-19T15:00:00&BBOX=-130,24,-65,52,0,0&WIDTH=-1&HEIGHT=-1&DEPTH=-1&FORMAT=NetCDF-table

CF-1.5, CF:featureType = "stationTimeSeries", 5.8.2.1 Multidimensional representation
http://webapps.datafed.net/ogc_EPA.wsfl?SERVICE=WCS&REQUEST=GetCoverage&VERSION=1.0.0&CRS=EPSG:4326&COVERAGE=AIRNOW.pmfine&TIME=2008-12-19T15:00:00&BBOX=-130,24,-65,52,0,0&WIDTH=-1&HEIGHT=-1&DEPTH=-1&FORMAT=NetCDF-sts

In the website, "point" was spelled with lowercase, so I used it.

The format names in query, NetCDF-table and NetCDF-sts I have just made up, WCS spec should standardize them.

Kari

John Caron 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