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

• To: "McCann, Mike" <mccann@xxxxxxxxx>
• Subject: Re: [netcdf-java] Getting a single coordinate axis value from a TDS aggregation
• From: John Caron <caron@xxxxxxxxxxxxxxxx>
• Date: Sat, 14 Nov 2009 08:36:21 -0700

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,

I’m 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/_>

------------------------------------------------------------------------

_______________________________________________
netcdf-java mailing list
netcdf-java@xxxxxxxxxxxxxxxx

For list information or to unsubscribe, visit: http://www.unidata.ucar.edu/mailing_lists/

• Follow-Ups:
  • Re: [netcdf-java] Getting a single coordinate axis value from a TDS aggregation
    • From: McCann, Mike

• References:
  • [netcdf-java] Getting a single coordinate axis value from a TDS aggregation
    • From: McCann, Mike