Simon,
That looks like it should work. Can you send me or point me to the actual
data files so I can try to reproduce with your NCML?
Ryan
On Fri, Feb 27, 2015 at 9:12 AM, Wright, Simon M. <smw@xxxxxxxxx> wrote:
> Dear All
>
>
>
> I’m trying to set up a nested aggregation to use in THREDDS 4.5.2 but am
> having some issues, so wonder if anyone can help.
>
>
>
> I’m following the Nested Aggregation example at
> http://www.unidata.ucar.edu/software/thredds/current/netcdf-java/ncml/Aggregation.html
>
> and have created the following ncml file:
>
>
>
> <?xml version='1.0' encoding='UTF-8'?>
>
> <netcdf xmlns='http://www.unidata.ucar.edu/namespaces/netcdf/ncml-2.2'>
>
> <aggregation dimName="time" type="joinExisting">
>
> <netcdf>
>
> <aggregation type="union">
>
> <netcdf
> location="../detail/MORECSDailyRf19610101to20131231.nc" />
>
> <netcdf
> location="../detail/MORECSDailySun19610101to20131231.nc" />
>
> <netcdf
> location="../detail/MORECSDailyTemp19610101to20131231.nc" />
>
> <netcdf
> location="../detail/MORECSDailyVapP19610101to20131231.nc" />
>
> <netcdf
> location="../detail/MORECSDailyWSp19610101to20131231.nc" />
>
> </aggregation>
>
> </netcdf>
>
> <netcdf>
>
> <aggregation type="union">
>
> <netcdf
> location="../detail/MORECSDailyRf20140101to20141231.nc" />
>
> <netcdf
> location="../detail/MORECSDailySun20140101to20141231.nc" />
>
> <netcdf
> location="../detail/MORECSDailyTemp20140101to20141231.nc" />
>
> <netcdf
> location="../detail/MORECSDailyVapP20140101to20141231.nc" />
>
> <netcdf
> location="../detail/MORECSDailyWSp20140101to20141231.nc" />
>
> </aggregation>
>
> </netcdf>
>
> </aggregation>
>
> </netcdf>
>
>
>
> The data in the netCDF files is daily data with time values being relative
> to 01/01/1961. For the files suffixed with 19610101to20131231.nc there
> are 19358 values on the time dimension with values ranging between 0.0 and
> 19357.0. For those files suffixed 20140101to20141231.nc there are 365
> values on the time dimension with values ranging between 19358.0 and
> 19722.0. All other dimensions in the netCDF files – eastings and northings
> on the British National Grid- are the same.
>
>
>
> When I check the NcML file using the ToolsUI version 4.5 using NcML and
> Aggregation tabs I get the following error:
>
>
>
> java.nio.file.InvalidPathException: Illegal char <:> at index 4
>
>
>
> However, when I check the ncml file using the ToolsUI version 4.3 again
> using the NcML and Aggregation tabs I see the aggregation that I expect
> with 5 union-ed variables with a time dimension having 19358 + 365 = 19723
> values. The following summary is displayed in the ToolsUI 4.3 interface:
>
>
>
> Type=joinExisting
>
> dimName=time
>
> Datasets
>
>
> file:F:/THREDDS/MORECS/20150227/aggregation/DetailWholeDataset.ncml#4138984
> range=[0:19358) (19358)
>
>
> file:F:/THREDDS/MORECS/20150227/aggregation/DetailWholeDataset.ncml#25192620
> range=[19358:19723) (365)
>
> timeUnitsChange=false
>
> totalCoords=19723
>
>
>
> Aggregation Variables
>
> time(time=19723)
>
> rainfall_amount(time=19723, y=28, x=17)
>
> duration_of_sunshine(time=19723, y=28, x=17)
>
> air_temperature(time=19723, y=28, x=17)
>
> water_vapor_partial_pressure_in_air(time=19723, y=28, x=17)
>
> wind_speed(time=19723, y=28, x=17)
>
>
>
> Cache Variables
>
> time (ucar.nc2.ncml.AggregationOuterDimension$CoordValueVar)
>
>
>
> Variable Proxies
>
> lat cached
>
> lon cached
>
> crs cached
>
> rainfall_amount proxy ucar.nc2.ncml.AggregationExisting
>
> duration_of_sunshine proxy ucar.nc2.ncml.AggregationExisting
>
> air_temperature proxy ucar.nc2.ncml.AggregationExisting
>
> water_vapor_partial_pressure_in_air proxy
> ucar.nc2.ncml.AggregationExisting
>
> wind_speed proxy ucar.nc2.ncml.AggregationExisting
>
> x proxy ucar.nc2.dataset.CoordinateAxis1D
>
> y proxy ucar.nc2.dataset.CoordinateAxis1D
>
> time proxy ucar.nc2.dataset.CoordinateAxis1D
>
>
>
> So is there an issue with trying to check nested aggregation NcML files
> using version 4.5 of the netCDF ToolsUI?
>
>
>
>
>
>
>
> Furthermore, when I copy the netCDF files and NcML file to a THREDDS 4.5.2
> server, restart it, and check the nested aggregation using the OPeNDAP
> interface the time dimension is displayed as having 38716 values, double
> the number of time values I’m expecting. When I download the time values
> using the OPeNDAP interface the time values returned are 0.0, 1.0, 2.0, …,
> 19355.0, 19356.0, 19357.0, 0.0, 1.0, 2.0, …, 19355.0, 19356.0, 19357.0.
>
>
>
> Similarly, when I use the NetCDFSubset interface I can download netCDF
> files for dates between 01/01/1961 to 31/12/2013 but when I try to download
> a netCDF file for any dates between 01/01/2014 to 31/12/2014 I get a
> “Requested time 2014-01-01T00:00:00Z does not intersect actual time range
> 1961-01-01T00:00:00Z – 2013-12-31T00:00:00Z” error.
>
>
>
> Also, when I use the Godiva2 viewer to view some of the data the date
> range on the calendar widget allows values between 01/01/1961 to 31/12/2013
> to be visualised but not any dates between 01/01/2014 to 31/12/2014.
>
>
>
> Therefore does anyone know if there are issues using a NcML Nested
> Aggregation with THREDDS 4.5.2? Or am I’m specifying the NcML Nested
> Aggregation incorrectly?
>
>
>
>
>
>
>
> Many thanks for any help that anyone can provide.
>
>
>
> Best wishes, Simon.
>
>
>
>
>
>
>
> Simon Wright
>
> Centre for Ecology & Hydrology Lancaster
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--
Ryan May
Software Engineer
UCAR/Unidata
Boulder, CO
