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2901.0 - Census Dictionary, 2006 (Reissue)  
Previous ISSUE Released at 11:30 AM (CANBERRA TIME) 17/11/2006  Reissue
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Contents >> Glossary >> Centroid

Centroid


The centroid is the centre of a digital bounded area, for example a Collection District (CD). This point is assigned a set of latitude and longitude coordinates.


In some cases, such as a crescent-shaped area, the centroid may lie outside the limits of the area.


The centroid enables Census data to be reproduced for any aggregation of CDs falling within any radius of a defined point. For example, a client may require data for a television viewing area. This may require the identification of all CDs with a centroid within a twenty kilometre radius of a particular CD. Some thematic maps containing Census data attach symbols to centroids for display purposes.


See Collection District (CD), Digital base map data, Digital boundaries.


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