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Shire of Roebourne

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Glossary

Age Specific Propensities (birth and death)
This relates to the modelling of births and deaths. At each year of age, there is a certain statistical likelihood of a person dying or giving birth. These age specific propensity rates are applied to the base and forecast population for each year of the forecast period.
Ageing in Place
This refers to an existing resident population ageing in their current location, as distinct from other impacts on future population such as births, deaths and in and out migration.
Average annual percentage change
A calculation of the average change in total population for each individual year.
Average household size
The average number of persons resident in each occupied private dwelling. Calculated as the number of persons in occupied private dwellings divided by the number of occupied private dwellings. This excludes persons living in non-private dwellings, such as prisons, military bases, nursing homes etc.
'Bottom up' forecast
Population forecast based on assumptions made at the local area level. Local drivers of change such as land stocks and local area migration form the basis.
Broadhectare Land or Sites
Broadhectare land refers to undeveloped land zoned for residential development on the fringe of the established metropolitan area. These areas are generally used for rural purposes until residential subdivision takes place. This type of land is also referred to as ‘greenfield’.
Commencement
The construction of a new dwelling (or beginning of).
Dwelling
A habitable residential building.
Dwelling Stock
The supply of dwellings (either occupied or unoccupied) in a given geographic area.
Empty Nesters
Parents whose children have left the family home to establish new households elsewhere.
Estimated Resident Occupied Private Dwellings (EROPD)
This measure attempts to increase the scope of Occupied Private Dwellings definition to include an estimate of SPD’s that were temporarily unoccupied at the time of the Census (i.e. the resident was away for an extended period of time and did not fill in a Census form). This measure is not available from the Census and is estimated through the processes described in the most recent Victorian Department of Planning & Community Development population forecasts for Victoria. This measure yields much higher estimates of occupancy rates than the usual OPD measure.
Estimated Resident Population (ERP)
This is the estimate of the population based on their usual residence. The ERP at the time of the Census is calculated as the sum of the enumerated (counted) population plus persons temporarily absent less persons who are non-permanent (visitor) residents. An undercount of population by small area at Census time is also accounted for. The ERP used in these forecasts is then backdated to June 30. The ERP for forecast years are based on adding to the estimated population the components of natural increase and net migration.
Forecast Period
In this report, the forecast period is from 2006 to 2031. Most data on the website has focused on the period from 2006 to 2021.
Household
One or more persons living in a structural private dwelling.
In-centre development
Residential development based on increasing dwelling densities around suburb and town centres. Usually around existing transport nodes and service infrastructure, rather than developing previously undeveloped land on the urban fringe.
'Infill' Development
Residential development, usually of a relatively small scale, on redevelopment sites in established urban areas. This usually takes place on land previously used for another urban purpose such as industry or schools. Also referred to as ‘intensification’ of existing areas.
Mature families
One and two parent families with older children, generally of secondary and tertiary school age.
Migration
The movement of people or households from one location to another.
Natural Increase
The increase in population based on the births minus deaths, not including the impact of migration.
Net Household Additions
The overall increase in occupied dwellings, determined by the level of new dwelling construction that is permanently occupied, or conversion of non-permanently occupied dwellings to permanently occupied minus demolitions.
Non-private dwellings
These dwellings include persons resident in establishments such as prisons, student or nurses’ accommodation, nursing homes, military facilities, and hospitals.
Occupancy Rate
The proportion of structural private dwellings that are occupied by a household.
Occupied Private Dwellings (OPD)
These are all Structural Private Dwellings (SPD’s) that are occupied by a household. Excluded are dwellings that were under construction, being demolished or where the house was temporarily vacant.
Private dwellings
Self contained dwelling including houses (attached or detached), flats, townhouses etc. Retirement village units are also private dwellings as are houses or flats rented from the government.
Redevelopment Sites
These are sites in already established areas not originally developed for residential uses, but identified for conversion to residential use. Examples include former school sites, quarries, derelict industrial land, former petrol stations and the like.
Structural Private Dwellings (SPD)
This is the stock of houses, flats, and other dwelling types. The SPD is the usual base stock from which commencements are added and demolitions deducted.
'Top down' forecast
Population forecast based on assumptions made at the State and National level and allocated into smaller regions e.g. Local Government Areas, suburbs.
Visitor population forecasts
Visitor population forecasts are based on 'non-event' affected, mid-week visitor levels. The 2006 base figures are sourced from Census, with an adjustment for undercount similar to that applied to the resident population (see Estimated Resident Population). Overall forecast levels are based on long term trends in visitor population growth in the Shire, with specific reference to current proposals for the purposes of allocation in the short-term. Visitor population forecasts have been included as they are a significant component of total population and may require specific servicing arrangements pertinent to resource allocation within Council.
Young families
One and two parent families with young children, generally of pre and primary school age.