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File format

cristianlussana edited this page Jun 27, 2019 · 1 revision

NetCDF file format is used.

ncdump of a (daily) file follows:

netcdf seNorge2018_20190626 {
dimensions:
	X = 1195 ;
	Y = 1550 ;
	time = UNLIMITED ; // (1 currently)
	nv = 2 ;
variables:
	double UTM_Zone_33 ;
		UTM_Zone_33:scale_factor_at_central_meridian = 0.9996 ;
		UTM_Zone_33:longitude_of_central_meridian = 15. ;
		UTM_Zone_33:latitude_of_projection_origin = 0. ;
		UTM_Zone_33:false_easting = 500000. ;
		UTM_Zone_33:false_northing = 0. ;
		UTM_Zone_33:_FillValue = -1. ;
		UTM_Zone_33:grid_mapping_name = "transverse_mercator" ;
		UTM_Zone_33:utm_zone_number = 33 ;
		UTM_Zone_33:inverse_flattening = 298.257222101 ;
		UTM_Zone_33:semi_major_axis = 6378137. ;
		UTM_Zone_33:proj4 = "+proj=utm +zone=33 +datum=WGS84 +units=m +no_defs +ellps=WGS84 +towgs84=0,0,0" ;
		UTM_Zone_33:_CoordinateTransformType = "Projection" ;
		UTM_Zone_33:_CoordinateAxisType = "GeoX GeoY" ;
	double X(X) ;
		X:units = "meters" ;
		X:standard_name = "projection_x_coordinate" ;
		X:long_name = "x coordinate of projection" ;
	double Y(Y) ;
		Y:units = "meters" ;
		Y:standard_name = "projection_y_coordinate" ;
		Y:long_name = "y coordinate of projection" ;
	float lat(Y, X) ;
		lat:units = "degrees_north" ;
		lat:_FillValue = NaNf ;
		lat:long_name = "latitude coordinate" ;
		lat:standard_name = "latitude" ;
	float lon(Y, X) ;
		lon:units = "degrees_east" ;
		lon:_FillValue = NaNf ;
		lon:long_name = "longitude coordinate" ;
		lon:standard_name = "longitude" ;
	float rr(time, Y, X) ;
		rr:units = "kg/m^2" ;
		rr:_FillValue = -999.99f ;
		rr:grid_mapping = "UTM_Zone_33" ;
		rr:coordinates = "lon lat" ;
		rr:long_name = "daily total precipitation (06-06)" ;
		rr:standard_name = "precipitation_amount" ;
		rr:cell_methods = "time: sum" ;
		rr:version = "1.0" ;
		rr:prod_date = "2019-06-27" ;
		rr:references = "\"Lussana, C., Saloranta, T., Skaugen, T., Magnusson, J., Tveito, O. E., and Andersen, J.: seNorge2 daily precipitation, an observational gridded dataset over Norway from 1957 to the present day, Earth Syst. Sci. Data, 10, 235-249, https://doi.org/10.5194/essd-10-235-2018, 2018\"" ;
	float tg(time, Y, X) ;
		tg:units = "Celsius" ;
		tg:_FillValue = -999.99f ;
		tg:grid_mapping = "UTM_Zone_33" ;
		tg:coordinates = "lon lat" ;
		tg:long_name = "daily_mean_temperature" ;
		tg:standard_name = "air_temperature" ;
		tg:cell_methods = "time: mean" ;
		tg:prod_date = "2019-06-27" ;
		tg:version = "\"1.0\"" ;
		tg:references = "\"Lussana, C., Tveito, O. E. and Uboldi, F. (2018), Three-dimensional spatial interpolation of 2 m temperature over Norway. Q.J.R. Meteorol. Soc.. doi:10.1002/qj.3208\"" ;
	double time(time) ;
		time:cell_methods = "time: sum" ;
		time:bounds = "time_bnds" ;
		time:units = "days since 1900-01-01 00:00:00" ;
		time:axis = "T" ;
		time:calendar = "standard" ;
		time:long_name = "time" ;
		time:standard_name = "time" ;
	int time_bnds(time, nv) ;
		time_bnds:units = "days since 1900-01-01 00:00:00" ;
		time_bnds:_FillValue = -999 ;
		time_bnds:long_name = "time interval endpoints" ;
		time_bnds:cell_methods = "nv: sum" ;
	float tn(time, Y, X) ;
		tn:units = "Celsius" ;
		tn:_FillValue = -999.99f ;
		tn:grid_mapping = "UTM_Zone_33" ;
		tn:coordinates = "lon lat" ;
		tn:long_name = "daily_min_temperature" ;
		tn:standard_name = "air_temperature" ;
		tn:prod_date = "2019-06-26" ;
		tn:version = "\"1.0\"" ;
		tn:references = "\"Lussana, C., Tveito, O. E. and Uboldi, F. (2018), Three-dimensional spatial interpolation of 2 m temperature over Norway. Q.J.R. Meteorol. Soc.. doi:10.1002/qj.3208\"" ;
	float tx(time, Y, X) ;
		tx:units = "Celsius" ;
		tx:_FillValue = -999.99f ;
		tx:grid_mapping = "UTM_Zone_33" ;
		tx:coordinates = "lon lat" ;
		tx:long_name = "daily_max_temperature" ;
		tx:standard_name = "air_temperature" ;
		tx:prod_date = "2019-06-26" ;
		tx:version = "\"1.0\"" ;
		tx:references = "\"Lussana, C., Tveito, O. E. and Uboldi, F. (2018), Three-dimensional spatial interpolation of 2 m temperature over Norway. Q.J.R. Meteorol. Soc.. doi:10.1002/qj.3208\"" ;

// global attributes:
		:institution = "Norwegian Meteorological Institute, MET Norway" ;
		:creator_url = "met.no" ;
		:title = "seNorge_2018" ;
		:license = "https://www.met.no/en/free-meteorological-data/Licensing-and-crediting" ;
		:source = "MET Norway" ;
		:comment = "Our open data are licensed under Norwegian Licence for Open Government Data (NLOD) or a Creative Commons Attribution 4.0 International License at your preference. Credit should be given to The Norwegian Meteorological institute, shortened “MET Norway”, as the source of data." ;
		:Conventions = "CF-1.7" ;
		:version = "\"beta\"" ;
		:summary = "\"seNorge_2018 is an observational gridded dataset. The data sources are: the Norwegian Meteorological Institute Climate Database, the Swedish Meteorological and Hydrological Institute Open Data API, the Finnish Meteorological Institute open data API and the European Climate Assessment & Dataset (www.ecad.eu)\"" ;
}

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