Dear Dr. Schmunk, dear CF experts, I'm wondering if CF concentions say anything about the grouping within a netCDF4 file, and if PanoplyJ can handle files with different groups? I couldn't find anything in the documentation, but wanted to make sure.
I'm having issues using PanoplyJ (http://www.giss.nasa.gov/tools/panoply/) with a file where data and coordinate variables are in different groups. For example, the data variable of this file cannot be plotted with Panoply: ---8<------- dimensions: lon = 5760 ; lat = 2880 ; time = UNLIMITED ; // (204 currently) nv = 2 ; group: coordinates { variables: double lon(lon) ; lon:standard_name = "longitude" ; lon:units = "degrees_east" ; lon:bounds = "lon_bnds" ; double lon_bnds(lon, nv) ; double lat(lat) ; lat:standard_name = "lat" ; lat:units = "degrees_north" ; lat:bounds = "lat_bnds" ; double lat_bnds(lat, nv) ; int time(time) ; time:standard_name = "time" ; time:units = "hours since 1994-01-01 00:00:00 +0:00" ; time:calendar = "gregorian" ; time:bounds = "time_bnds" ; int time_bnds(time, nv) ; } // group coordinates group: data { group: VCDtrop_NO2 { group: SCIAMACHY { variables: float sciamachy_vcdtrop-no2_v4(time, lon, lat) ; sciamachy_vcdtrop-no2_v4:_FillValue = NaNf ; sciamachy_vcdtrop-no2_v4:least_significant_digit = 5L ; } // group SCIAMACHY } // group VCDtrop_NO2 } // group data } ---8<------- However, when collapsed so that all variables are in the rootgrp, the file is plotted correctly: ---8<------- dimensions: lon = 5760 ; nv = 2 ; lat = 2880 ; time = UNLIMITED ; // (204 currently) variables: double lon(lon) ; lon:standard_name = "longitude" ; lon:units = "degrees_east" ; lon:bounds = "lon_bnds" ; double lon_bnds(lon, nv) ; double lat(lat) ; lat:standard_name = "lat" ; lat:units = "degrees_north" ; lat:bounds = "lat_bnds" ; double lat_bnds(lat, nv) ; int time(time) ; time:standard_name = "time" ; time:units = "hours since 1994-01-01 00:00:00 +0:00" ; time:calendar = "gregorian" ; time:bounds = "time_bnds" ; int time_bnds(time, nv) ; double sciamachy_vcdtrop-no2_v4(time, lon, lat) ; sciamachy_vcdtrop-no2_v4:_FillValue = NaN ; sciamachy_vcdtrop-no2_v4:least_significant_digit = 5L ; ---8<------- So my question is: is this a bug in PanoplyJ, or is Panoply doing the right thing and I don't understand the CF conventions correctly? Your help is greatly appreciated! Andreas. -- Andreas. _______________________________________________ CF-metadata mailing list [email protected] http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
