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A working document for the mapping of Rijkswaterstaat DONAR parameters to Um Aquo, CF and BODC/SeaDataNet is maintained in the OpenEarth repository: https://repos.deltares.nl/repos/OpenEarthTools/trunk/matlab/applications/Rijkswaterstaat/rws_waterbase_name2standard_name.xls (OpenEarth password required, register for free at http://oss.deltares.nl).

A presentation on this matter was presented in the joint Rijkswaterstaat-Deltares-KNMI SOS2012 project (ppt, only for SOS2012 members).

//!! Working draft on how to encode UM Aquo semantics
//!! into netCDF syntax. This will apply to Dutch government
//!! data and model output in netCDF as present in:
//!! OpenEarth: http://opendap.deltares.nl/thredds/catalog/opendap/rijkswaterstaat/waterbase/catalog.html
//!! Matroos  : https://opendap-matroos.deltares.nl/thredds/catalog.html (access registration required)
//!! This is an example for in situ salinity data at one location.
//!! The additions related to UM Aquo are indicated with //!!

NetCDF id559-APPZK1.nc {

dimensions:
	time = 174 ;
	locations = 1 ;
	name_strlen1 = 6 ;
	name_strlen2 = 25 ;

//global Attributes:
		:title = " "
		:institution = "Rijkswaterstaat"
		:source = "surface observation"
		:history = "Source: http://live.waterbase.nl/wswaterbase/cgi-bin/wbGETDATA?ggt=id559&site=MIV&lang=nl&a=getData&gaverder=GaVerder&from=164810240000&loc=APPZK1&to=201103020000&fmt=text, tranformation to netCDF: $HeadURL: https://repos.deltares.nl/repos/OpenEarthTools/trunk/matlab/applications/Rijkswaterstaat/rws_waterbase2nc.m $ $Revision: 4182 $ $Date: 2011-03-06 22:49:53 +0100 (zo, 06 mrt 2011) $ $Author: boer_g $"
		:references = "<http://www.waterbase.nl>,<http://openearth.deltares.nl>"
		:email = "<servicedesk-data@rws.nl>"
		:comment = "The structure of this netCDF file is described in: https://cf-pcmdi.llnl.gov/trac/wiki/PointObservationConventions, http://cf-pcmdi.llnl.gov/documents/cf-conventions/1.5/cf-conventions.html#id2867470"
		:version = " "
		:terms_for_use = "These data can be used freely for research purposes provided that the following source is acknowledged: Rijkswaterstaat."
		:disclaimer = "This data is made available in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE."
		:Conventions = "CF-1.6; UMAquo 201x"
//!! In global Conventions attribute indicate that we use UMAquo 201x IN ADDITION(!) to CF according to:
//!! http://www.unidata.ucar.edu/software/netcdf/conventions.html

variables:
	single sea_water_salinity(locations,time), shape = [1 174]
		sea_water_salinity:long_name = "Saliniteit in oppervlaktewater"
		sea_water_salinity:units = "psu"
		sea_water_salinity:standard_name = "sea_water_salinity"
		sea_water_salinity:_FillValue = NaN f
		sea_water_salinity:cell_methods = "time: point area: point"
		sea_water_salinity:actual_range = 26.396 33.0996

//!! UMAquo 201x should prescribe the names of the required and optional
//!! attributes that contain contents from the tables. Here are preliminary names
//!! after a discussion with Hinne Reitsma (IHW) and Gerben de Boer (Deltares)
//!! Any netCDF client can count on these keywords to be present when UMAquo
//!! 201x is part of the global attribiute 'Conventions', see below.
//!!
//!! required: code form tables, same status as mandatory CF standard_name and units
//!!
//!!		sea_water_salinity:aquo_grootheid_code = "SALNTT"
//!!		sea_water_salinity:aquo_grootheid_typering_code = "?"
//!!		sea_water_salinity:aquo_eenheid_code = "?"
//!!		sea_water_salinity:aquo_hoedanigheid_code = "?"
//!!		sea_water_salinity:aquo_compartiment_code = "?"
//!!
//!! optional: human readable text (resolved RDF), same status as optional CF long_name
//!!
//!!		sea_water_salinity:aquo_grootheid_omschrijving = "?"
//!!		sea_water_salinity:aquo_grootheid_typering_omschrijving = "?"
//!!		sea_water_salinity:aquo_eenheid_omschrijving = "?"
//!!		sea_water_salinity:aquo_hoedanigheid_omschrijving = "?"
//!!		sea_water_salinity:aquo_compartiment_omschrijving = "?"
//!!
//!!		sea_water_salinity:donar_wnsnum = 559
//!!		sea_water_salinity:sdn_standard_name = "P011/185/ODSDM021"

	char station_id(locations,name_strlen1), shape = [1 6]
		station_id:long_name = "station ID"
		station_id:standard_name = "station_id"
	char station_name(locations,name_strlen2), shape = [1 25]
		station_name:long_name = "station name"
		station_name:standard_name = "station_name"
	single lon(locations), shape = [1]
		lon:long_name = "station longitude"
		lon:units = "degrees_east"
		lon:standard_name = "longitude"
		lon:grid_mapping = "wgs84"
	single lat(locations), shape = [1]
		lat:long_name = "station latitude"
		lat:units = "degrees_north"
		lat:standard_name = "latitude"
		lat:grid_mapping = "wgs84"
	int32 wgs84([]), shape = [1]
		wgs84:name = "WGS 84"
		wgs84:epsg = 4326
		wgs84:grid_mapping_name = "latitude_longitude"
		wgs84:semi_major_axis = 6.37814e+006
		wgs84:semi_minor_axis = 6.35675e+006
		wgs84:inverse_flattening = 298.257
		wgs84:proj4_params = "+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs "
		wgs84:EPSG_code = "EPSG:4326"
		wgs84:projection_name = "Latitude Longitude"
	single x(locations), shape = [1]
		x:long_name = "station x"
		x:units = "m"
		x:standard_name = "projection_x_coordinate"
		x:grid_mapping = "epsg"
	single y(locations), shape = [1]
		y:long_name = "station y"
		y:units = "m"
		y:standard_name = "projection_y_coordinate"
		y:grid_mapping = "epsg"
	int32 epsg([]), shape = [1]
		epsg:name = "Amersfoort / RD New"
		epsg:epsg = 7415
		epsg:epsg_name = "Oblique Stereographic"
		epsg:grid_mapping_name = " "
		epsg:semi_major_axis = 6.3774e+006
		epsg:semi_minor_axis = 6.35608e+006
		epsg:inverse_flattening = 299.153
		epsg:latitude_of_projection_origin = 52.0922
		epsg:longitude_of_projection_origin = 5.23155
		epsg:false_easting = 155000
		epsg:false_northing = 463000
		epsg:scale_factor_at_projection_origin = 0.999908
		epsg:proj4_params = "+proj=sterea +lat_0=52.15616055555555 +lon_0=5.38763888888889 +k=0.999908 +x_0=155000 +y_0=463000 +ellps=bessel +units=m +towgs84=565.4174,50.3319,465.5542,-0.398957388243134,0.343987817378283,-1.87740163998045,4.0725 +no_defs"
		epsg:EPSG_code = "EPSG:7415"
		epsg:projection_name = "Amersfoort / RD New"
	single z(locations,time), shape = [1 174]
		z:long_name = "station depth"
		z:units = "meters"
		z:standard_name = "height_above_reference_ellipsoid"
		z:positive = "up"
		z:axis = "Z"
	double time(time), shape = [174]
		time:long_name = "time"
		time:units = "days since 1970-01-01 00:00:00 +01:00"
		time:standard_name = "time"
		time:_FillValue = NaN

}
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