NetCDF Climate and Forecast (CF) Metadata Conventions as Attributes More information: http://www.cgd.ucar.edu/cms/eaton/cf-metadata/CF-1.0.html#att_app cf, standard, name , attributes M. Benno Blumenthal Web documentation Version 1.0, 28 October 2003, accessed 2004-12-14 Luis Bermudez MMI 2005-12-15T11:00:00 Luis Bermudez CF Attributes ontology valid_min valid_min NUG(8.1) Smallest valid value of a variable. add_offset NUG(8.1) , 8.1 add_offset If present for a variable, this number is to be added to the data after it is read by an application. If both scale_factor and add_offset attributes are present, the data are first scaled before the offset is added. leap_month leap_month Specifies which month is lengthened by a day in leap years for a user defined calendar. 4.4.1 Identifies latitude, longitude, vertical, or time axes. Y T Z X axis axis 4 Units of a variable's content. units NUG(8.1), 3.1 units cell_methods Records the method used to derive data that represents cell values. cell_methods 7.3, 7.4 NUG(8.1) _FillValue _FillValue A value used to represent missing or undefined data. 5, 6.1, 6.2 Identifies auxiliary coordinate variables, label variables, and alternate coordinate variables. coordinates coordinates title Short description of the file contents. NUG(8.1) title id ancillary_variables Identifies a variable that contains closely associated data, e.g., the measurement uncertainties of instrument data. 3.4 ancillary_variables up down positive COARDS Direction of increasing vertical coordinate value. positive month_lengths Specifies the length of each month in a non-leap year for a user defined calendar. month_lengths 4.4.1 climatology 7.4 climatology Identifies a climatology variable. NUG(8.1) valid_range valid_range Smallest and largest valid values of a variable. NUG(8.1) Name of the conventions followed by the dataset. Conventions Conventions history List of the applications that have modified the original data. history NUG(8.1) grid_mapping Identifies a variable that defines a grid mapping. 5.6 grid_mapping Where the original data was produced. institution institution 2.6.2 missing_value A value used to represent missing or undefined data (deprecated by the NUG). missing_value 2.5.1 3.3 standard_name standard_name A standard name that references a description of a variable's content in the standard name table. references References that describe the data or methods used to produce it. references 2.6.2 4.4.1 calendar the documentation says the domain should be coordinate_variable -- don't think that is right Calendar used for encoding time axes. calendar 366_day none julian all_leap 365_day noleap proleptic_gregorian standard gregorian cell_measures 7.2 cell_measures Identifies variables that contain cell areas or volumes. Links bounds Identifies a boundary variable. bounds 7.1 Records dimensions which have been compressed by gathering. compress compress 8.2, 5.3 comment 2.6.2 comment Miscellaneous information about the data or methods used to produce it. source source Method of production of the original data. 2.6.2 leap_year Provides an example of a leap year for a user defined calendar. It is assumed that all years that differ from this year by a multiple of four are also leap years. leap_year 4.4.1 App C standard_error_multiplier standard_error_multiplier If a data variable with a standard_name modifier of standard_error has this attribute, it indicates that the values are the stated multiple of one standard error. 4.3.2 Identifies variables that correspond to the terms in a formula. formula_terms formula_terms flag_meanings Use in conjunction with flag_values to provide descriptive words or phrases for each flag value. If multi-word phrases are used to describe the flag values, then the words within a phrase should be connected with underscores. flag_meanings 3.5 valid_max valid_max Largest valid value of a variable. NUG(8.1) 3.5 Provides a list of the flag values. Use in conjunction with flag_meanings. flag_values flag_values NUG(8.1) , 8.1 scale_factor If present for a variable, the data are to be multiplied by this factor after the data are read by an application See also the add_offset attribute. scale_factor A descriptive name that indicates a variable's content. This name is not standardized. long_name long_name NUG(8.1), 3.2