netcdf AQUIMAR/Aquimar_C4E.nc {
  dimensions:
    x = 517;
    y = 118;
    z = 80;
  variables:
    float x(x=517);
      :_FillValue = -9999.0f; // float
      :standard_name = "projection_x_coordinate";
      :units = "meters";
      :axis = "X";

    float y(y=118);
      :_FillValue = -9999.0f; // float
      :standard_name = "projection_y_coordinate";
      :units = "meters";
      :axis = "Y";

    float z(z=80);
      :_FillValue = -9999.0f; // float
      :standard_name = "depth";
      :units = "meters";
      :axis = "Z";
      :positive = "up";

    int crs;
      :_FillValue = -9999; // int
      :standard_name = "crs";
      :grid_mapping_name = "transverse_mercator";
      :scale_factor_at_central_meridian = 1; // int
      :longitude_of_central_meridian = -8.133108333333334; // double
      :latitude_of_projection_origin = 39.66825833333333; // double
      :false_easting = 0; // int
      :false_northing = 0; // int
      :unit = "meter";
      :inverse_flattening = 298.257222101; // double
      :semi_major_axis = 6378137.0; // double
      :projected_crs_name = "ETRS89_Portugal_TM06";
      :geographic_crs_name = "GCS_ETRS_1989";
      :horizontal_datum_name = "D_ETRS_1989";
      :reference_ellipsoid_name = "GRS_1980";
      :prime_meridian_name = "Greenwich";

    int cluster(z=80, y=118, x=517);
      :_FillValue = -9999; // int
      :standard_name = "seawater cluster";
      :units = "";
      :grid_mapping = "crs";

    float temp(z=80, y=118, x=517);
      :_FillValue = -9999.0f; // float
      :standard_name = "seawater temperature";
      :units = "°C";
      :grid_mapping = "crs";

    float sal(z=80, y=118, x=517);
      :_FillValue = -9999.0f; // float
      :standard_name = "seawater salinity";
      :units = "PSU";
      :grid_mapping = "crs";

    float DO(z=80, y=118, x=517);
      :_FillValue = -9999.0f; // float
      :standard_name = "seawater dissolved oxygen";
      :units = "mgO2/L";
      :grid_mapping = "crs";

    float PO4(z=80, y=118, x=517);
      :standard_name = "seawater phosphate";
      :units = "µmol/L";
      :grid_mapping = "crs";
      :_FillValue = -9999.0f; // float

    float NOx(z=80, y=118, x=517);
      :_FillValue = -9999.0f; // float
      :standard_name = "seawater total oxidized nitrogen";
      :units = "µmol/L";
      :grid_mapping = "crs";

    float SiO2(z=80, y=118, x=517);
      :_FillValue = -9999.0f; // float
      :standard_name = "seawater silicate";
      :units = "µmol/L";
      :grid_mapping = "crs";

    float CloA(z=80, y=118, x=517);
      :_FillValue = -9999.0f; // float
      :standard_name = "seawater chlorophyll a";
      :units = "mg/m3";
      :grid_mapping = "crs";

    float pH(z=80, y=118, x=517);
      :_FillValue = -9999.0f; // float
      :standard_name = "seawater pH";
      :units = "";
      :grid_mapping = "crs";

  // global attributes:
  :title = "AQUIMAR - Ecological Marine Units - C4E";
  :summary = "Ecological Marine Units for AQUIMAR, Campaign 4 (2020-02-24 to 2020-03-20), Area E (Algarve)";
  :keywords = "cluster analysis, marine ecosystem, ocean variable, three-dimensional interpolation, voxel layer";
  :references = "Dias, T. G.; Costa, A. C. M.; Nunes, P. J. A. (2022) Three-dimensional mapping of ocean variables on the Portuguese coast";
  :source = "Three-dimensional interpolation, using the Empirical Bayesian Kriging 3D (EBK3D) method and cluster analysis, using the k-means method, of sample data acquired for Project AQUIMAR (https://aquimar.hidrografico.pt)";
  :Conventions = "CF-1.9";
  :institution = "IH, NOVA-IMS";
  :history = "2022-07-29 Creation of AQUIMAR - EMU - C4E netcdf file.";
}