[thredds] aggregation error - illegal range for dimension?

• To: "thredds@xxxxxxxxxxxxxxxx" <thredds@xxxxxxxxxxxxxxxx>
• Subject: [thredds] aggregation error - illegal range for dimension?
• From: "Seamon, Erich" <erichs@xxxxxxxxxx>
• Date: Fri, 30 Aug 2013 20:30:58 +0000

Hello all - Im trying to aggregate a series of nc files that have 'day' as the 
time dimension - with 365 entries in each file - representing daily readings.

This is a piece from my catalog.xml

<dataset name="MET Maximum Reflectance 1979-2012 Aggregated" 
ID="agg_met_rmax_1979_2012_WUSA" serviceName="all" harvest="true" 
urlPath="agg_met_rmax_1979_2012_WUSA.nc">
    <netcdf xmlns="http://www.unidata.ucar.edu/namespaces/netcdf/ncml-2.2";>
      <aggregation dimName="day" type="joinExisting" timeUnitsChange="true">
        <scan location="/xxxx/xxxx/xxxx/MET/" regExp="rmax.*\.nc$" 
subdirs="false" />
      </aggregation>
    </netcdf>
  </dataset>


When I attempt to access a subset more than one year - I get a javaexception - 
'illegal range for dimension 2:  last requested 753 > 365 max'

Ncdump of a file that im trying to aggregate:

netcdf vs_2012 {
dimensions:
        day = 366 ;
        lon = 1386 ;
        lat = 585 ;
variables:
        float lon(lon) ;
                lon:units = "degrees_east" ;
                lon:description = "longitude" ;
        float lat(lat) ;
                lat:units = "degrees_north" ;
                lat:description = "latitude" ;
        float day(day) ;
                day:units = "days since 1900-01-01 00:00:00" ;
                day:calendar = "gregorian" ;
                day:description = "days since 1900-01-01" ;
        float wind_speed(lat, lon, day) ;
                wind_speed:units = "m/s" ;
                wind_speed:description = "Daily Mean Wind Speed" ;
                wind_speed:_FillValue = -9999.f ;
                wind_speed:esri_pe_string = 
"GEOGCS[\\\"GCS_WGS_1984\\\",DATUM[\\\"D_WGS_1984\\\",SPHEROID[\\\"WGS_1984\\\",6378137.0,298.257223563]],PRIMEM[\\\"Greenwich\\\",0.0],UNIT[\\\"Degree\\\",0.0174532925199433]]"
 ;
                wind_speed:coordinates = "lon lat" ;
                wind_speed:height = "10 m" ;
                wind_speed:missing_value = -9999. ;

}


--

I have other nc files that are very similar, and they aggregate fine.  The main 
difference is, the files that aggregate correctly have a 'time' dimension, not 
'day', and they use the 'noleap' calendar.

The files that do NOT aggregate have 'day' as the time dimension and use the 
'gregorian' calendar.

--

Im thinking that my aggregation xml is not structured right, maybe I should use 
JoinNew and declare 'day' as a coordinate variable?  It seems that JoinExisting 
would work given that the 'day' dimension exists in all files to aggregate.

Anyway, I would appreciate any help, and can provide other log information as 
necessary.

Im running the most recent stable version of TDS, on linux/red hat, under 
tomcat6



Thanks!

Erich

• Follow-Ups:
  • Re: [thredds] aggregation error - illegal range for dimension?
    • From: Ethan Davis