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Data quality information
5.4
Logical consistency
Data quality and checking procedures have been developed by Geoscience Australia to ensure that the
supplied data from the custodial authorities are complete and consistent. These have been applied
consistently to all the data as described below. As a result, all fields comply with the specified field length
and character type and are populated with valid attributes. Also, all place names are represented as a
coordinate pair stored in decimal degrees to five decimal places.
Quality checking of the data included:

Initial data checking to ensure compliance to agreed minimum standards and appropriateness of data for
further processing;

Format and attribution checking through a variety of tools during the consolidation and formatting of
Gazetteer data. This includes the use of pivot tables to identify invalid feature codes and correctly map
them to official Gazetteer feature codes. This process was also used for the 'Status' and 'Authority ID'
fields; and

Verifying place name coordinate positions by spatially checking that:
 All State/Territory place name features lie within State and Territory boundaries;
 All coast place name features lie on coastal regions;
 All sea place name features lie in the sea;
 All land place name features lie on the land; and
 All homestead place name features lie on land and within State and Territories.
5.5
Completeness
The place names in the Gazetteer are a subset of the complete information sets held by each of the State
and Territory place name authorities, the Australian Antarctic Division, the Australian Hydrographic Service
and Geoscience Australia. All fields for all records have been populated with the exception of the 'Variant
Names' field which is not a mandatory field.
Gazetteer of Australia 2010 Release Product User Guide 19