The valid range for each variable in an Earth Science data product should put useful constraints on the data.
Recommendation Details: Declaring the valid range of a variable's data according to the CF metadata conventions is part of an earlier DIWG recommendation (see Recommendation 2.1 of ESDS-RFC-028). The data value range can be specified either by two CF attributes,
valid_max , or via the
valid_range CF attribute. Only one of these approaches should be used for a given variable.