Hi John,
Will do, thanks!
(I have been testing out subsetting via the TDS for the ESG
folks upstairs from me, and I thought they had submitted a
bug report, but it sounds like it hasn't happened yet. I'll write
up what I've got and send it to you off-list.)
Cheers,
--Seth
On Wed, 28 Aug 2013 17:25:21 -0600
John Caron <caron at unidata.ucar.edu> wrote:
>Hi Seth:
>
>On 8/28/2013 12:59 PM, Seth McGinnis wrote:
>> Hi Sean,
>>
>> Personally, I would regard that as suspect behavior.
>>
>> I'm of the opinion that it's best practice for a data service to
>> affect the data it operates on in very targeted and transparent
>> way, and that it should pass everything else through untouched.
>> If it doesn't do that, it's harder to trust the service, because
>> the more ways that it modifies the data, the more opportunities
>> there are for it to get something wrong, and the more likely it
>> is that the error will go unnoticed because it's hiding amongst a
>> bunch of other changes.
>
>We take this philosophy also.
>
>>
>> Case in point, I have recently discovered that when the THREDDS
>> server subsets CF data that uses a coordinate system other that
>> lat-lon, it mangles a bunch of the ancillary data in the file. I
>> suspect this happens, ironically enough, precisely because it's
>> trying to make the data CF-1.0 conformant instead of just leaving
>> it as-is...
>
>Let us know what the specifics are and we can try to make it better.
>
>>
>> So yes, I think it's significant that the data coming out of
>> THREDDS is in a different convention than the source files, and
>> that it's cause for concern.
>
>A famous story from NCAR data portal early days is that some users added the
>Conventions = "CF-1.0" attribute to their data because they had to make their
>data CF compliant. But thats all they did. Hey, it passed the compliance
>checker! ;)
>
>Regards,
>John
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Received on Thu Aug 29 2013 - 12:44:20 BST
