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5.3 Data Quality Modules

The Data Quality group is composed of the following modules: Lineage, Positional Accuracy, Attribute Accuracy, Logical Consistency, and Completeness. Suggestions and requirements for the Attribute field groups associated with these modules are specified in section 3.

Information on data quality can be carried at different levels of aggregation. Thus, information on quality can refer to a domain, map, theme, or an individual spatial object. The Catalog can be used to make reference to the level of specificity of the information on quality. This can be done through the use of Catalog/Cross Reference or the Catalog/Spatial Domain module subfields. There is also the provision for a data quality overlay relationship where a separate data layer provides the geometric and attribute information that applies to another data layer.

Use of all data quality modules in a data transfer is mandatory, and must include at least a statement to the effect that no data quality description is available at the time of data preparation if such a statement reflects the status of the information available.

5.3.1 Lineage Module

The Lineage module transfers the information described in 3.1 (see Table 26). This module may contain elaboration of the information also coded in 5.2.1, Identification. However, the transformation details must be transferred in the Spatial Reference modules (see 5.2.4).

5.3.2 Positional Accuracy Module

The Positional Accuracy module transfers the description of testing procedures and related details specified in 3.2 (see Table 27).

5.3.3 Attribute Accuracy Module

The Attribute Accuracy module transfers all information required by 3.3 (see Table 28).

5.3.4 Logical Consistency Module

The Logical Consistency module transfers all information required by 3.4 (see Table 29).

5.3.5 Completeness Module

The Completeness module transfers all information required by 3.5 (see Table 30)