Definitions for "Data quality"
In GIS, a measure or identification of how fit for use cartographic data is. Data quality applies to various levels, from an individual point to the entire data set or coverage.
The degree of excellence exhibited by the data in relation to a correct portrayal of the actual phenomena.
The degree of excellence of data. Factors contributing to data quality include: the data is stored according to their data types, the data is consistent, the data is not redundant, the data follows business rules, the data corresponds to established domains, the data is timely, the data is well understood, the data satisfy the needs of the business, the user is satisfied with the validity of the data and the information derived from that data, the data is complete, and there are no duplicate records. For example, this means that a customer's name is spelled correctly and the address is correct.