Category: Data Quality
Element: COMPLETENESS
Definition of Element:
Completeness is an assessment of the extent and range of the dataset with regard to completeness of coverage, completeness of classification and completeness of verification.
Completeness of coverage is an assessment of the proportion of the dataset available in its entirety (ie. spatial and attribute).
Completeness of classification is an assessment of how well the chosen classification method (refer to attribute accuracy) is able to represent the 'real world' features contained within the dataset.
Completeness of verification is an assessment of the amount of "work" (ie. field work or other methods) carried out to validate the correct representation of 'real world' features contained within the dataset.
In completing entries for this element, use whatever concept of completeness as described above is most relevant to the dataset.
Allowable content:
Free text. If no answer is possible, use one of the following Not Known, Not Documented or Not Relevant.
Format Rules: Sentences are preferred.
Field Type: Text
Length of Field: Maximum 1000 characters.
Other comments: Nil.
Example(s)
Example 1: [Forest Types]
Forest types are usually mapped at a scale of 1:25 000 following their delineation on aerial photographs of similar or larger scales (1:15 000). While quite small areas of special value can be readily identified in the field for individual management, areas less than 2 ha size, or 50 m in width were not represented.
Map legends are compact and standardised. Forest type numbers are shown on maps, but legends carry only limited descriptive information, such as actual major species occurring within types. Users of all maps are urged to consult map legends because of the ongoing changes to the classification (type numbers and description for types which have been recognised since the first edition of the Baur classification report). Maps without update classification will remain in use until time permits their revision.
Example 2: [Brisbane Region Street and Address Network - Version 3.3]
Completeness of coverage
99% of all gazetted streets are included in the dataset. Private streets are included only where they form an important part of the overall street network.
Completeness of classification
All streets are assigned a Road Name. The value "ROAD" is assigned to a street where no road name is available.
Completeness of verification
Spatial and Attribute verification of the dataset is performed by the following methods:
Example 3: [Psyllid Affected Areas at 1:25 000 (PSYLLID25)]
Complete for selected blocks.
Example 4: [Land Information Access]
Tenure details complete and verified. Street Address details partial complete.