ACT Geographic Data Directory
| ACT Geographic Data Directory |
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Note: This dataset description is metadata (data about data) which describes the actual dataset in accordance with the ANZLIC (Australia New Zealand Land Information Council) Core Metadata Guidelines
ANZLIC unique identifier: ANZAC0236001058
Title: DUS Corporate Geographic Database - Land Use Agistment
Custodian: ACT Government, Department of Urban Services, Customer Service and Information, Information Management Branch
Jurisdiction: Australian Capital Territory
Abstract:
Environment ACT, a business unit within DUS is the custodian of the source data for the Agistment table in the Corporate Geographic Database (CGD). This layer is a modified version of the Environment ACT agistment data. It has been created to the specification agreed to as a part of the GIM Strategy and included in the CGD created under that strategy. The CGD creates a fully homogeneous and integrated set of core geographic information which uses Oracle SDO. The CGD is a read only Oracle spatial database hosted within the ACT Government's production computing environment and is capable of being directly read by most GIS software. The CGD stores data in both the ACT Stromlo Projection and MGA94 projection for Zone55. This data set includes the following attributes: Agistment_ID, Description, ANZLIC_ID, Source_ANZLIC_ID, Feature_Type_Code, Create_Date, Area and Feature_Instance_Metadata_ID.
ANZLIC search words:
Spatial domain:
Geographic extent name: AUSTRALIAN CAPITAL TERRITORY - ACT - State or Territory - Australia
Note: The format for each Geographic extent name is: Name - Identifier - Category - Jurisdiction (as appropriate) See GEN Register
Beginning date: 2003-07-27
Ending date: Current
Progress: Complete
Maintenance and update frequency: Annually
Access constraints:
The Corporate Geographic Database has been compiled as a part of the ACT Geographic Information Management Strategy. Community access data sets in the database are available for internal use by agencies in the ACT Government, including presentation through ACT Government web sites. Use outside of this should be approved by the supplier of the source data (Environment ACT). This data set is classified as Community Access.
Lineage:
The Agistment table has been created from the agistment data provided by Environment ACT. The original data was supplied as a Shape file in AGD66 projection. This was then imported into an ArcInfo coverage, reprojected to ACT Stromlo projection and restructured to conform to the logical Corporate Data Model. The data was then cleaned using a tolerance of 5mm. The result was then converted to Oracle Spatial using an Arc Coverage import to FME and further verification performed. Contact the DUS IM Branch for further information on these processes.
Positional accuracy:
A prospective user should contact the supplier of the source data set (Environment ACT) for details of the horizontal accuracy. The errors introduced through the conversion process to this data set are less than 0.1m. The Z value is not stored.
Attribute accuracy:
The attributes are estimated to be correct at the 95% confidence level or better.
Logical Consistency:
The source data is managed in a way which largely eliminates logical inconsistencies. Some minor variations may be introduced in the transfer process, however all geometry is then cleaned using ArcInfo software prior to transfer to the final Oracle Spatial format. The clean tolerance used is 5mm. Regions are created to ensure the completeness of multipolygons.
Completeness:
The data provided by the source custodian is managed using ArcView software. Updates are performed on an irregular basis. The latest version of this data is used for each update of the CGD table.
Metadata date: 2007-12-03
Metadata reference: http://indexgeo.net/asdd/act/ANZAC0236001058.html
This dataset description can be discovered via the Australian Spatial Data Directory (ASDD)