Hi Upendra,
I do not know, but if you could also show the aggregation code in the
catalog.xml file, we might see something, that causes the problem...
Regards,
Remon
On 09/28/2010 04:37 PM, Upendra Dadi wrote:
Hi,
I have a problem involving NcML aggregation. I have created an NcML
aggregation file using joinExisting with aggregation over time.
The das for the first file in the aggregation file is:
-------------------------------------------------------------------------------
Attributes {
time {
String long_name "reference time of sst field";
String standard_name "time";
String axis "T";
String units "seconds since 1981-01-01 00:00:00";
}
lat {
String long_name "latitude";
String standard_name "latitude";
String axis "Y";
String units "degrees_north";
}
lon {
String long_name "longitude";
String standard_name "longitude";
String axis "X";
String units "degrees_east";
}
analysed_sst {
String long_name "analysed sea surface temperature";
String standard_name "sea_surface_temperature";
String type "foundation";
String units "kelvin";
Int16 _FillValue -32768;
Float64 add_offset 273.15;
Float64 scale_factor 0.01;
Int16 valid_min -300;
Int16 valid_max 4500;
}
......
......
--------------------------------------------------------
The das file for the aggregation file(NcML file) is:
--------------------------------------------------------------------------
Attributes {
lat {
}
lon {
}
time {
}
analysed_sst {
String _CoordinateAxes "time lat lon ";
String long_name "analysed sea surface temperature";
String standard_name "sea_surface_temperature";
String type "foundation";
String units "kelvin";
Int16 _FillValue -32768;
Float64 add_offset 273.15;
Float64 scale_factor 0.01;
Int16 valid_min -300;
Int16 valid_max 4500;
}
NC_GLOBAL {
String time.long_name "reference time of sst field";
String time.standard_name "time";
String time.axis "T";
String time.units "seconds since 1981-01-01 00:00:00";
String lat.long_name "latitude";
String lat.standard_name "latitude";
String lat.axis "Y";
String lat.units "degrees_north";
String lon.long_name "longitude";
String lon.standard_name "longitude";
String lon.axis "X";
String lon.units "degrees_east";
String Conventions "CF-1.0";
.....
.....
-------------------------------------------------------------------------
As you can see, the attributes for latitude, longitude and time have
moved from the variables
to the global attributes after the aggregation for some reason.
Shouldn't they remain with the
variables? The aggregation file is no longer CF compliant due to this.
What is going on here?
Is it a THREDDS problem? Or is there away to correct this?
Upendra
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--
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Remon Sadikni
University of Hamburg / KlimaCampus Hamburg
Center for Integrated Climate System Analysis and Prediction - CliSAP
Grindelberg 5 / D-20144 Hamburg / Germany
phone: +49-40-42838-7581
email: remon.sadikni@xxxxxxx
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
