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The Queensland Government broadhectare (residential land supply) study quantifies the amount of land, which is predominantly greenfield (undeveloped), available for future residential development. A number of constraints (characteristics) are analyzed against parcels of land to identify those that are physically suitable, potentially available under planning scheme provisions and in the case of urban residential development, intended to be serviced with reticulated water and sewerage. By comparing dwelling projections against the residential land supply, an estimate of supply can be calculated and any potential shortages identified.The land identified in the broadhectare study is the first stage in the land development pipeline. It includes parcels of land identified as suitable and potentially available for future residential development. The study focuses on land parcels greater than 0.25 ha. The identified residential land is categorised according to development potential as for either urban or rural residential use. The timing for land development is based on local government infrastructure extension programs, recent lot approvals and the development intentions of major developers. Timing is divided into the following five categories:0\u20132 years2+\u20135 years5+\u201310 years10+ yearsnot specified.The category \u2018not specified\u2019 also includes smaller parcels in existing developed areas where development occurs randomly (depending on the owners\u2019 intentions).The spatial analysis process utilised in the broadhectare study involves creating segments based on the Digital Cadastral Database (DCDB) over each local government area. Each segment is then updated with data that impact on the suitability and availability for residential development. 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