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Re: Adding a service to a remotely served dataset



Hello Roy-
That particular dataset will be turned on shortly via WCS. That was an oversight. Nice to have users telling us where we need stuff! Glenn


Ethan Davis wrote the following on 7/6/2007 6:02 PM:
Hi Roy,

Looks like you are referencing NCDC catalogs rather than serving the datasets yourself. So, users would get redirected to the NCDC server and access the data through the NCDC server. So, as things stand, NCDC would have to add the WCS service.

You could point to each NCDC dataset with an NcML wrapper and actually serve the data from your server rather than redirecting to NCDC. If you did that, you could add the WCS service. However, the performance wouldn't be as good as direct from NCDC.

I'm afraid I don't know about the WCS request for a time range. So, I'll leave that for others to answer.

Ethan

Roy Mendelssohn wrote:
Hi Ethan:

I am not certain I follow.  To be more specific, look at:

http://oceanwatch.pfeg.noaa.gov/thredds/catalog.html

and scroll down to the datasets " Remote test to Nomads THREDDS catalog", which is actually on a THREDDS server on an NCDC computer. They are remotely served through catalogs. Can we add the WCS service on our end, or will it only work if NCDC adds the WCS service.

While I have your attention, I have not been able to get a straight answer if there is a way to send the WCS request to get a time range, rather than a single time, and if so what is the syntax for that.

Thanks,

-Roy

On Jul 6, 2007, at 11:24 AM, Ethan Davis wrote:

Hi Roy,

If you are actually serving the dataset through your server (which it sounds like you are since you mention existing NcML for the dataset) rather than providing a link in your catalog to the remote server, I believe you can simply add the WCS service to your TDS configuration catalog and serve the data via WCS. It shouldn't require any changes to the NcML, just to the service element in the catalog.

Of course, this depends on the dataset meeting the WCS server requirements, e.g., evenly spaced grid.

I'm not sure how it would perform. But I'll leave it for John to respond on that.

Ethan

Roy Mendelssohn wrote:
Hi:

The question for today is if our TDS is "serving" a dataset remotely (ie. the remote site has their own TDS and we just link indirectly to it), can we add a service to our version that they don't have (just like we can aggregate a remote dataset that is not aggregated). In particular the remote dataset only has an OPeNDAP response, but we would like to be able to respond to both an OPeNDAP and a WCS response.

If we change our NcML appropriately, will that work?

Thanks in advance,

-Roy

**********************
"The contents of this message do not reflect any position of the U.S. Government or NOAA."
**********************
Roy Mendelssohn
Supervisory Operations Research Analyst
NOAA/NMFS
Environmental Research Division Southwest Fisheries Science Center
1352 Lighthouse Avenue
Pacific Grove, CA 93950-2097


e-mail: address@hidden (Note new e-mail address)
voice: (831)-648-9029
fax: (831)-648-8440
www: http://www.pfeg.noaa.gov/

"Old age and treachery will overcome youth and skill."



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--Ethan R. Davis Telephone: (303) 497-8155
Software Engineer Fax: (303) 497-8690
UCAR Unidata Program Center E-mail: address@hidden
P.O. Box 3000
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**********************
"The contents of this message do not reflect any position of the U.S. Government or NOAA."
**********************
Roy Mendelssohn
Supervisory Operations Research Analyst
NOAA/NMFS
Environmental Research Division Southwest Fisheries Science Center
1352 Lighthouse Avenue
Pacific Grove, CA 93950-2097


e-mail: address@hidden (Note new e-mail address)
voice: (831)-648-9029
fax: (831)-648-8440
www: http://www.pfeg.noaa.gov/

"Old age and treachery will overcome youth and skill."




-- Glenn K. Rutledge Services Team Leader Remote Sensing and Applications Division NOMADS Project Manager National Oceanic and Atmospheric Administration National Climatic Data Center Asheville NC 28801 Phone: (828) 271-4097 Fax: (828) 271-4328

NOMADS: http://nomads.ncdc.noaa.gov/

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