[Esip-documentation] cdm_data_type defintion

[Nan Galbraith]

No, I think Mike's right, and erddap uses cdm_data_type.

http://osmc.noaa.gov/erddap/categorize/cdm_data_type/index.htmlTable :
point
profile
timeseries
trajectory



On 2/19/15 3:43 PM, Bob Simons - NOAA Federal via Esip-documentation wrote:
> You're talking about featureType, the CF attribute which is
> well-defined and widely supported by software, notably by netcdf-java.
> I'm talking about cdm_data_type, which is ill-defined and not widely
> used by software because of that.
>
> On Thu, Feb 19, 2015 at 12:18 PM, Mike McCann via Esip-documentation
> <esip-documentation at lists.esipfed.org> wrote:
>> I think ERDDAP may be the only software which actually uses this attribute
>> in a very specific, programmatic way...
>>
>>
>> The STOQS software also depends on proper values in the featureType
>> attribute (though is sometimes able to infer the appropriate featureType
>> from cdm_data_type attribute in legacy data sets).
>>
>> I concur that "CF might/should expand the use of featureType", and make sure
>> the semantics align with other vocabularies.
>>
>> -Mike
>>
>> --
>> Mike McCann
>> Software Engineer
>> Monterey Bay Aquarium Research Institute
>> 7700 Sandholdt Road
>> Moss Landing, CA 95039-9644
>> Voice: 831.775.1769  Fax: 831.775.1736 http://www.mbari.org
>>
>> On Feb 19, 2015, at 10:33 AM, Bob Simons - NOAA Federal via
>> Esip-documentation <esip-documentation at lists.esipfed.org> wrote:
>>
>> I think cdm_data_type is a troubled attribute.
>> Unidata has released several different lists of CDM data types over the
>> years as CDM progressed. Those all still exist at various URLs on the web
>> and in Unidata code (some of it obsolete).
>> CF has a new(er), closely related featureType attribute
>> http://cfconventions.org/Data/cf-conventions/cf-conventions-1.6/build/cf-conventions.html#idp6280704
>> but it is unfortunately just for Discrete Sampling Geometry types.
>>
>> I think ACDD 1.3 chose to avoid dealing with this in hopes that CF will
>> solve the problem. E.g., CF might/should expand the use of featureType.
>>
>> I think ERDDAP may be the only software which actually uses this attribute
>> in a very specific, programmatic way, which is vocabulary which is a combo
>> of
>> * the values that CF's featureType uses (from just before CF created the
>> featureType attribute), e.g., TimeSeries.
>> * a few other Unidata CDM types, e.g., Grid
>> * "Other"
>> http://coastwatch.pfeg.noaa.gov/erddap/download/setupDatasetsXml.html#cdm_data_type
>>
>> I'm sorry there isn't a better answer.
>>
>>
>> On Thu, Feb 19, 2015 at 9:51 AM, Armstrong, Edward M (398G) via
>> Esip-documentation <esip-documentation at lists.esipfed.org> wrote:
>>>
>>> Hi folks
>>>
>>> I’ve come across a request for the proper usage of the ACDD attribute
>>> cdm_data_type.  This has been retained in  ver 1.3.   But what are the
>>> examples of its implementation ? According to:
>>>
>>>
>>> http://www.unidata.ucar.edu/software/thredds/current/tds/catalog/InvCatalogSpec.html#dataType
>>>
>>> attribute examples could “Grid” ,“Swath”, “Point" etc.  But some popular
>>> implementation embedded in existing examples use a lowercase syntax such as
>>> “swath”
>>>
>>> Which is the proper implementation, upper vs lowercase ?  Or perhaps this
>>> is still nebulous.  I did find this note from Bob Simmons in our recent ACCD
>>> v1.3 discussion on a google doc spreadsheet (but I don’t remember the
>>> consensus  on it):
>>>
>>> cdm_data_type should not be tied to
>>>
>>> http://www.unidata.ucar.edu/software/thredds/current/tds/catalog/InvCatalogSpec.html#dataType
>>> which is out-of-date and obsolete
>>>
>>> Any insight appreciated.
>>>
>>> -ed
>>>
>>> Ed Armstrong
>>> JPL Physical Oceanography DAAC
>>> 818 519-7607
>>>
>>>
>>>
>>>
>>> _______________________________________________
>>> Esip-documentation mailing list
>>> Esip-documentation at lists.esipfed.org
>>> http://lists.deltaforce.net/mailman/listinfo/esip-documentation
>>>
>>
>>
>> --
>> Sincerely,
>>
>> Bob Simons
>> IT Specialist
>> Environmental Research Division
>> NOAA Southwest Fisheries Science Center
>> 99 Pacific St., Suite 255A      (New!)
>> Monterey, CA 93940               (New!)
>> Phone: (831)333-9878            (New!)
>> Fax:   (831)648-8440
>> Email: bob.simons at noaa.gov
>>
>> The contents of this message are mine personally and
>> do not necessarily reflect any position of the
>> Government or the National Oceanic and Atmospheric Administration.
>> <>< <>< <>< <>< <>< <>< <>< <>< <><
>>
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>>
>>
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>
>


-- 
*******************************************************
* Nan Galbraith        Information Systems Specialist *
* Upper Ocean Processes Group            Mail Stop 29 *
* Woods Hole Oceanographic Institution                *
* Woods Hole, MA 02543                 (508) 289-2444 *
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