Hi David,
Oops, you've been trying to replicate the wrong file. The THREDDS page I
pointed you to has 3 access methods: OPENDAP, NetcdfSubset, and HTTPServer. I
meant for you to download from the HTTPServer service, not NetcdfSubset. My
fault, I should have been more clear.
The original H.2.1.1.nc file, which HTTPServer will return to you unaltered,
uses the Orthogonal multidimensional array representation of time series [1].
The NetcdfSubset service rewrote the original file to be in Indexed ragged
array representation [2].
Orthogonal is what you want. For clarity, I'll go ahead and paste the ncdump of
the correct file:
netcdf C:/Users/cwardgar/Desktop/H.2.1.1.nc {
dimensions:
station = 10;
time = 5;
name_strlen = 3;
variables:
float humidity(station=10, time=5);
:standard_name = "specific_humidity";
:coordinates = "time lat lon alt";
double time(time=5);
:standard_name = "time";
:long_name = "time of measurement";
:units = "days since 1970-01-01 00:00:00";
float lon(station=10);
:standard_name = "longitude";
:long_name = "station longitude";
:units = "degrees_east";
float lat(station=10);
:standard_name = "latitude";
:long_name = "station latitude";
:units = "degrees_north";
float alt(station=10);
:long_name = "vertical distance above the surface";
:standard_name = "height";
:units = "m";
:positive = "up";
:axis = "Z";
char station_name(station=10, name_strlen=3);
:long_name = "station name";
:cf_role = "timeseries_id";
// global attributes:
:featureType = "timeSeries";
:Conventions = "CF-1.6";
}
If you can get your dataset to look like that, you'll be good to go. You may
wonder about the "station_name" variable and its "cf_role" attribute. From the
CF docs [3]:
"It is strongly recommended that there should be a station variable (which may
be of any type) with the attribute cf_role=âtimeseries_idâ, whose values
uniquely identify the stations."
So, the values needn't be names or even strings, but they ought to be unique.
Cheers,
Christian
[1]
http://cfconventions.org/Data/cf-conventions/cf-conventions-1.7/build/cf-conventions.html#idm43165546432
[2]
http://cfconventions.org/Data/cf-conventions/cf-conventions-1.7/build/cf-conventions.html#idm43165513616
[3]
http://cfconventions.org/Data/cf-conventions/cf-conventions-1.7/build/cf-conventions.html#time-series-data
Ticket Details
===================
Ticket ID: WON-355400
Department: Support netCDF Java
Priority: Normal
Status: Closed
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