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Re: 20051220: NcML Aggregation in THREDDS

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  • Subject: Re: 20051220: NcML Aggregation in THREDDS
  • Date: Tue, 20 Dec 2005 13:19:06 -0700
Hi Bjorge:

Since you are explicitly writing the netcdf elements, we were expecting that 
you could write the correct values there without having to translate through a 
DateFormat. Is that not so? (see below also)

Unidata Support wrote:

------- Forwarded Message



To: address@hidden
From: =?ISO-8859-1?Q?Bj=F8rge_Solli?= <address@hidden>
Subject: NcML Aggregation in THREDDS
Organization: Nansen Environmental and Remote Sensing Center - Bergen
Keywords: 200512201217.jBKCH47s009594 THREDDS NcML aggregation



Hi,
I am currently rewriting our xml-files to use the new aggregation functionality in Thredds 3.4. I have looked over all the documentation I could find on thredds and NcML but still have one unansvered Q. Hope you can help: 

In the old version we used AggServer with an xml-statement like this:
...
<aggregation serviceName=".." aggType=".." varType=".." varUnit".." dateFormat="yyyy/M/d:hh:mm:ss z"> <fileAccess urlPath="long_name_b20030604_f200305289999.nc" coord="2003/05/28:00:00:00 GMT" /> 
   ...
...
My remaining Q is where I should write dateFormat now. I have something like this: 
...
<variable name="time" type="int" shape="time">
   <attribute name="units" value=".." />
   <attribute name="_CoordinateAxisType" value="Time" />
</variable>


Here you are defining a time coordinate of dataType "int"


<aggregation dimName="time" type="joinNew">
   <variableAgg name="T" />
netcdf location="long_name_b20030604_f200305289999.nc" coord=""2003/05/28:00:00:00 GMT" /> 

But you are giving it String values.
Do you have the ability to write ISO 8601 date strings? If so, I would change the type of the time coordinate to String and do that. 
   ...
...
Since I am not using the scan tag I cannot use the dateFormatMark either (which would not work on this example anyway since the filename is not the same in front of the #-mark, which would have to be after the '_f'). 

We will also add regular expression matcher for that case.



Hope you understand my question and find time to answer.

Thankyou!