netcdf delta_density_grid {
// Sample NetCDF CDL file of a regular 4D grid, complying with NetCDF convention CF-1.0
// and with Unidata Dataset Discovery v1.0 metadata conventions for data discovery.

// This file has only one observed variable, delta_density, but several different variables
// with values at the the same grid points may be included in one NetCDF file. Several times too.
// Convert to binary NetCDF with the command ncgen -o inputfile.cdl outputfile.nc

dimensions:
        time = 1 ;
	depth = 19 ;
	latitude = 100 ;
	longitude = 192 ;

variables:
	float time(time) ;
		time:long_name = "time of model" ;
		time:units = "seconds since 1995-01-01 00 UTC" ;
	float depth(depth) ;
		depth:long_name = "depth below earth surface; km; positive values downwards" ;
		depth:units = "kilometers" ;
		depth:positive = "down" ;
	float latitude(latitude) ;
		latitude:long_name = "latitude" ;
		latitude:units = "degrees_north" ;
                latitude:standard_name = "latitude" ;
	float longitude(longitude) ;
		longitude:long_name = "longitude" ;
		longitude:units = "degrees_east" ;
                longitude:standard_name = "longitude" ;
	float delta_density(time, depth, latitude, longitude) ;
	        delta_density:long_name = "offset in density" ; 
		delta_density:units = "kilogram / mr^3" ; 
                delta_density:valid_range = -10.0, 10.0 ; 
                delta_density:_FillValue = -9999.0f ; // missing data flag

// global attributes
        // these describe the data creation, name the creator(s), and support online discovery.
        // see http://www.unidata.ucar.edu/software/netcdf-java/formats/DataDiscoveryAttConvention.html
        :title = " " ;              //short description of what is in the dataset
        :summary = " ";             //a sentence or paragraph describing the dataset
        :keywords = " ";            //a comma-separated list of keywords and phrases
        :Conventions = "CF-1.0";    // do not change
        :Metadata_Conventions = "Unidata Dataset Discovery v1.0";// do not change
        :creator_name = " " ;
        :creator_url = " " ;
        :creator_email = " " ;
        :institution = " ";         // where produced
        :acknowledgment=" "; //  support for the project that produced this data
        :references = " ";//publications or web references that describe data or its production
        :history = " ";   // audit trail for modifications, with dates, version numbers, etc
        :comment = " ";   // miscellaneous information
        :geospatial_lat_min = "" ;
        :geospatial_lat_max = "" ;
        :geospatial_lat_units = "degrees_north" ;
        :geospatial_lat_resolution = "0.01" ;
        :geospatial_lon_min = "" ;
        :geospatial_lon_max = "" ;
        :geospatial_lon_units = "degrees_east" ;
        :geospatial_lon_resolution = "" ;
        :geospatial_vertical_min = "" ; // relative to surface of earth
        :geospatial_vertical_max = "" ;
        :geospatial_vertical_units = "kilometers" ;
        :geospatial_vertical_resolution = "" ;
        :geospatial_vertical_positive = "down" ;
        :time_coverage_start = "1999-07-04T22:30" ;
        :time_coverage_end = "25 days since 1999-07-04" ;
        :time_coverage_resolution = "sec" ;

data:

 time = 0.0;

 depth = 17.5, 52.5, 90, 135, 185, 240, 305, 375, 450, 530, 615, 705, 795, 
    885, 975, 1075, 1190, 1325, 1500 ;

 latitude = 49.75, 49.25, 48.75, 48.25, 47.75, 47.25, 46.75, 46.25, 45.75, 
    45.25, 44.75, 44.25, 43.75, 43.25, 42.75, 42.25, 41.75, 41.25, 40.75, 
    40.25, 39.75, 39.25, 38.75, 38.25, 37.75, 37.25, 36.75, 36.25, 35.75, 
    35.25, 34.75, 34.25, 33.75, 33.25, 32.75, 32.25, 31.75, 31.25, 30.75, 
    30.25, 29.75, 29.25, 28.75, 28.25, 27.75, 27.25, 26.75, 26.25, 25.75, 
    25.25, 24.75, 24.25, 23.75, 23.25, 22.75, 22.25, 21.75, 21.25, 20.75, 
    20.25, 19.75, 19.25, 18.75, 18.25, 17.75, 17.25, 16.75, 16.25, 15.75, 
    15.25, 14.75, 14.25, 13.75, 13.25, 12.75, 12.25, 11.75, 11.25, 10.75, 
    10.25, 9.75, 9.25, 8.75, 8.25, 7.75, 7.25, 6.75, 6.25, 5.75, 5.25, 4.75, 
    4.25, 3.75, 3.25, 2.75, 2.25, 1.75, 1.25, 0.75, 0.25 ;

 longitude = 60.25, 60.75, 61.25, 61.75, 62.25, 62.75, 63.25, 63.75, 64.25, 
    64.75, 65.25, 65.75, 66.25, 66.75, 67.25, 67.75, 68.25, 68.75, 69.25, 
    69.75, 70.25, 70.75, 71.25, 71.75, 72.25, 72.75, 73.25, 73.75, 74.25, 
    74.75, 75.25, 75.75, 76.25, 76.75, 77.25, 77.75, 78.25, 78.75, 79.25, 
    79.75, 80.25, 80.75, 81.25, 81.75, 82.25, 82.75, 83.25, 83.75, 84.25, 
    84.75, 85.25, 85.75, 86.25, 86.75, 87.25, 87.75, 88.25, 88.75, 89.25, 
    89.75, 90.25, 90.75, 91.25, 91.75, 92.25, 92.75, 93.25, 93.75, 94.25, 
    94.75, 95.25, 95.75, 96.25, 96.75, 97.25, 97.75, 98.25, 98.75, 99.25, 
    99.75, 100.25, 100.75, 101.25, 101.75, 102.25, 102.75, 103.25, 103.75, 
    104.25, 104.75, 105.25, 105.75, 106.25, 106.75, 107.25, 107.75, 108.25, 
    108.75, 109.25, 109.75, 110.25, 110.75, 111.25, 111.75, 112.25, 112.75, 
    113.25, 113.75, 114.25, 114.75, 115.25, 115.75, 116.25, 116.75, 117.25, 
    117.75, 118.25, 118.75, 119.25, 119.75, 120.25, 120.75, 121.25, 121.75, 
    122.25, 122.75, 123.25, 123.75, 124.25, 124.75, 125.25, 125.75, 126.25, 
    126.75, 127.25, 127.75, 128.25, 128.75, 129.25, 129.75, 130.25, 130.75, 
    131.25, 131.75, 132.25, 132.75, 133.25, 133.75, 134.25, 134.75, 135.25, 
    135.75, 136.25, 136.75, 137.25, 137.75, 138.25, 138.75, 139.25, 139.75, 
    140.25, 140.75, 141.25, 141.75, 142.25, 142.75, 143.25, 143.75, 144.25, 
    144.75, 145.25, 145.75, 146.25, 146.75, 147.25, 147.75, 148.25, 148.75, 
    149.25, 149.75, 150.25, 150.75, 151.25, 151.75, 152.25, 152.75, 153.25, 
    153.75, 154.25, 154.75, 155.25, 155.75 ;

 delta_density =
  0.00143, 0.00143, 0.00143, 0.00143, 0.00045, 0.00045, 0.00045, 0.00045, 
    0.0008, 0.0008, 0.0008, 0.0008, -0.00152, -0.00152, -0.00152, -0.00152, 
    .....  data omitted 
    0.02162, -0.05621, -0.05621, -0.11059, -0.11059, -0.07901, -0.07901, 
    -0.04036, -0.04036, 0.00724, 0.00724, 0.03955, 0.03955, 0.03364, 0.03364, 
    0.0248, 0.0248, -0.02106, -0.02106, -0.03269, -0.03269, -0.02488 ;
}