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PSMA Australia Presentation National DCDB Workshop 28-31 July 2010 Michael Dixon Group Manager, Products & Services PSMA Australia.

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Presentation on theme: "PSMA Australia Presentation National DCDB Workshop 28-31 July 2010 Michael Dixon Group Manager, Products & Services PSMA Australia."— Presentation transcript:

1 PSMA Australia Presentation National DCDB Workshop July 2010 Michael Dixon Group Manager, Products & Services PSMA Australia

2 PSMA Australia Limited PSMA Australia Limited is an unlisted public company, established under Australia’s Corporations Act, wholly owned by the State, Territory and Australian Governments. To ensure that the substantial value inherently held within national spatial datasets can be readily accessed so as to deliver economic, social and environmental benefits to Australia. By forming and managing a crucial supply chain between creators of fundamental spatial information and users of this information by aggregating, integrating and distributing national spatial datasets. What Why How

3 Data CustodiansSolution Providers Governments of Australia How PSMA Australia Adds Value with its Current Datasets

4 Data CustodiansSolution Providers Governments of Australia How PSMA Australia Adds Value with its Current Datasets

5 How does PSMA Australia use jurisdiction DCDB contributions? CadLite Over 10.8 million polygons representing the registered land parcels in Australia updated quarterly with incremental updates available. Every parcel contains the legal parcel identifier that acts as a key to access richly attributed jurisdictional Digital Cadastral Data Bases (DCDB). Also contains links to key administrative data layers including Local Government Area and Locality. A property version of the dataset is also available. CadLite Over 10.8 million polygons representing the registered land parcels in Australia updated quarterly with incremental updates available. Every parcel contains the legal parcel identifier that acts as a key to access richly attributed jurisdictional Digital Cadastral Data Bases (DCDB). Also contains links to key administrative data layers including Local Government Area and Locality. A property version of the dataset is also available.

6 The CadLite Data Model

7 Statistics August 2010 Release CAD Features

8 Statistics August 2010 Release POINT Features

9 Statistics August 2010 Release POLYGON Features

10 How does it come together? Part of the Data Management Supply Chain (90 Day Cycle) References: Suburbs/Localities and Local Government Areas Majority of process basic standardisation of attribution Some exceptions: Jurisdiction ID Strata / Group Records Property Method varies for each jurisdiction.

11 Jurisdiction_ID Essentially a concatenation of lot,sec,plan etc. Aside from spatial really the only link back into source datasets StateConcatenationSample ACTDIST + “/” + DIV + “/” + SECTION + “/” + BLOCKWODE/CHIF/32/9 NSWLOTNUMBER + “/” + SECTIONNUM + “/” + PLANLABEL1/A//DP NTPAR_LOC + “/” + PAR_LTO + “/” + PAR_PAR + “/” + PAR_PT544//00612/ PAR_LOC + “/” + PAR_LTO + “/” + PAR_PAR + “/” + PAR_PT + “/” + UNIT_NUM 200//05454//14 QLDLOT_NUM + “/” + PLAN_NUM54/RP SAPLAN_T + PLAN + “/” + PARCEL_T + PARCELD4377/A184 TASLOT + “/” + PLAN15/39964 VICLOT_NUMBER + “/” + SEC + “/” + BLOCK + “/” PLAN_NO + “~” + ALLOTMENT + “/” + SEC + “/” + BLOCK + “/” + PORTION + “/” + PARISHC 269///PS62165~//// WAPIPARCELP

12 Strata / Group Records Spatial representation of strata/group records where they can be identified Representation is a Point Feature Features on ground floor represented as Polygon Features

13 Strata / Group Records QLD – separate point dataset provided by jurisdiction. TAS – Strata records are separated from cadastre where the ‘base’ parcel can be identified (Lot number = ‘0’). Strata polygons are converted to point objects. SA – Strata records are separated from the cadastre where they can be identified (Plan_T = “S” and Level <> 0) or (Plan_T = “C” and Level <> 0) in jurisdiction data. Strata polygons are converted to point objects. WA - Strata records separated from cadastre where (LOT_TYPE = “STPLAN” or LOT_TYPE = “SSPLAN”) in the original jurisdictional data. Strata polygons are converted to point objects.

14 Strata / Group Records ACT – (Strata/Group) A separate table called ACT_UNIT representing B-class unit properties is provided by the jurisdiction. These are retained as polygons. ACT Property table provides records indicating both A-Class and B-Class units. The A-Class units are converted to points as these are multi-story units whereas the B-Class are Ground level. VIC – Strata records are identified by occurrences of replication of CAD_POLYGON records. In these instances, generally the record with the lowest Lot number is retained as the base polygon and remaining records are converted to points.

15 Strata / Group Records NT – A point table representing parcels within Aboriginal communities is provided by the jurisdiction. While not ‘Strata’ records, these are processed for inclusion in the CAD_POINT table. NT_UNIT_ADDRESS_POINTS supplied with G-NAF contains addressing information. This Unit Address File contains point data that is consistent with typical Strata data. The combination of these 2 tables is used to create the CAD_POINT table. NSW – Strata records are identified by selecting records from Lot and Propertylot contributed tables where CadID values match and Classsubty = 3. The selected polygons are converted to point objects and assigned CAD_POINT_PID values equal to the associated CAD_POLYGON_PID + “/” + Lot Number.

16 Property Association of a “Property” to Cadastral Parcels Minimum spatial unit is a Cadastral Parcel NSW – PropId value from PROPERTYLOT table VIC - Pr_Pfi (Property_PFI) value from PROPERTY table QLD - Property_Id value from QVAS ADMIN tables SA - Assessment Number+Tenancy Sequence number from FUL_LINK table WA - VE_Number from VE_PURPOSES and GROUPED_LAND tables TAS – PID value from Cadastre data (used to build CadLite) NT - TEN_VOL_TY + “/” + TEN_VOL + “/” + TEN_FOL from NT_PROPERTY_CADASTRE ACT – Title Number from PROPERTY file & Title Number + Unit number from ACT_Units file.

17 Issues to be resolved Proposed Parcels Currently provided by some contributors Should they be included? Strata/Group Records More consistency in the way the data is represented Spatial Property Perhaps provides more value to “public” than cadastral boundary Closer integration with other themes e.g. addresses Integration with other themes Features of Interest

18 Future Directions New Themes Land Tenure Land Use / Cover Planning Zones Parcel Area Valuation Information Sales History Other RRRs (NIMLI Project) Additional Attribution of CadLite or New Themes 3D Cadastre

19 Questions Michael Dixon Group Manager, Products and Services Answers Contact PSMA Australia by phone: By Or visit our web resources at:


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