Re: [netcdf-java] Getting a single coordinate axis value from a TDS aggregation

• To: John Caron <caron@xxxxxxxxxxxxxxxx>
• Subject: Re: [netcdf-java] Getting a single coordinate axis value from a TDS aggregation
• From: "McCann, Mike" <mccann@xxxxxxxxx>
• Date: Sat, 14 Nov 2009 17:00:24 -0800

Hi John,

Thanks for the quick response.  I upgraded to Version 4.1.20091109.2156 and
the the problem has been fixed.

-Mike

On 11/14/09 7:36 AM, "John Caron" <caron@xxxxxxxxxxxxxxxx> wrote:

> Hi Mike:
> 
> I think that was a bug fixed in the rc2 (Oct 9) release. Can you get the
> latest TDS (Version 4.1.20091109.2156) and try it?
> 
> McCann, Mike wrote:
>> Hello,
>> 
>> I¹m having trouble accessing a single value that is not the first value
>> from the time coordinate axis from an aggregation of in situ mooring
>> observations.
>> 
>> Retreiving the first element works:
>> 
>>   
>> 
http://elvis.shore.mbari.org/thredds/dodsC/moorings/OS_M0_TS.ascii?TIME[0:1:0>>
]
>> 
>>     Dataset {
>>         Float64 TIME[TIME = 1];
>>     } moorings/OS_M0_TS;
>>     ---------------------------------------------
>>     TIME[1]
>>     19878.020833333332
>> 
>> 
>> However, requesting any other single value returns an exception, e.g.
>> the second value:
>> 
>>   
>> 
http://elvis.shore.mbari.org/thredds/dodsC/moorings/OS_M0_TS.ascii?TIME[1:1:1>>
]
>> 
>>     Error {
>>         code = 500;
>>         message = "NcSDArray ArrayIndexOutOfBoundsException=NcSDArray
>>     read TIME TIME(1,1,1) 1 dataset= moorings/OS_M0_TS";
>>     };
>> 
>> I can retrieve a range of values:
>> 
>>   
>> 
http://elvis.shore.mbari.org/thredds/dodsC/moorings/OS_M0_TS.ascii?TIME[0:1:1>>
]
>> 
>>     Dataset {
>>         Float64 TIME[TIME = 2];
>>     } moorings/OS_M0_TS;
>>     ---------------------------------------------
>>     TIME[2]
>>     19878.020833333332, 19878.0625
>> 
>> just not a single value that is not the first one.
>> 
>> 
>> Have I perhaps done something wrong in the catalog.xml?  Here is the
>> relevant section:
>> 
>> <dataset name="MBARI Mooring M0 CTD String Aggregation 60-Minute
>> Telemetered Data (2004-Present)"
>>                     ID="moorings/OS_M0_TS" urlPath="moorings/OS_M0_TS"
>>                     dataType="Station">
>>                 <serviceName>ncdods</serviceName>
>>                 <documentation type="Summary">Gridded 60 minute MBARI
>> Mooring M0 Sea Water Temperature and Salinity Observations Observations.
>>         These data have been gridded into 60 minute time cells from the
>> original telemetered instument data.
>>         Egregious outliers have been flagged according to OceanSITEs
>> conventions.</documentation>
>>                 <timeCoverage>
>>                     <start>2004-06-04T00:00:00Z</start>
>>                     <end>present</end>
>>                 </timeCoverage>
>>                 <ncml:netcdf>
>>                     <ncml:remove name="id" type="attribute"/>
>>                     <ncml:remove name="date_created" type="attribute"/>
>>                 
>>                     <ncml:remove name="created" type="attribute"/>
>>                     <ncml:remove name="source" type="attribute"/>
>>                     <ncml:remove name="program" type="attribute"/>
>>                     <ncml:remove name="history" type="attribute"/>
>>                     <ncml:remove name="version" type="attribute"/>
>>                 
>>                     <ncml:attribute name="id" type="String"
>> value="moorings/mbari_mooring_m0_ts_60_min"/>
>>                     <ncml:attribute name="title" type="String"
>>                             value="MBARI Mooring M0 CTD String
>> Aggregation"/>
>>                     <ncml:aggregation dimName="TIME" type="joinExisting">
>>                         <ncml:netcdf
>>                 
>> location="/mbari/ssdsdata/deployments/m0/200406/OS_M0_20040604_TS.nc"/>
>>                         <ncml:netcdf
>>                 
>> location="/mbari/ssdsdata/deployments/m0/200410/OS_M0_20041006_TS.nc"/>
>>                         <ncml:netcdf
>>                 
>> location="/mbari/ssdsdata/deployments/m0/200504/OS_M0_20050418_TS.nc"/>
>>                         <ncml:netcdf
>>                 
>> location="/mbari/ssdsdata/deployments/m0/200607/OS_M0_20060731_TS.nc"/>
>>                         <ncml:netcdf
>>                 
>> location="/mbari/ssdsdata/deployments/m0/200701/OS_M0_20070130_TS.nc"/>
>>                         <ncml:netcdf
>>                 
>> location="/mbari/ssdsdata/deployments/m0/200706/OS_M0_20070621_TS.nc"/>
>>                     </ncml:aggregation>
>>                 </ncml:netcdf>
>>             </dataset><!-- name="MBARI Mooring M0 CTD String Aggregation
>> " -->
>> 
>> I am running version 4.1.20090930.1852 - 20090930.1852 of thredds.war.
>> 
>> Any help is appreciated.
>> 
>> TIA,
>> 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_
>> <_http://www.mbari.org/_>
>> 
>> 
>> 
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>> 
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> 

• References:
  • Re: [netcdf-java] Getting a single coordinate axis value from a TDS aggregation
    • From: John Caron