Hydrological barrier is topologically consistent feature in hydrological network. Hydrological Crossing points are critical in the identification of obstructions, diversion and storage water for the hydrological enforcement of elevation models
Government agencies use this data to better manage water resources. The Australian Hydrological Geospatial fabric (Geofabric) is released through the Bureau of Meteorology which provides a framework for discovering, querying, reporting and modelling water information aligned with the definitions under the Water Act 2007 .
Government agencies use this data to
manage assets that interact with the water network
identify assets that cross waterways
plan for funding of maintenance of those assets
Standards and Specifications
AS1199.0-2003 Sampling procedures for inspection by attributes
AS4590:2006 Interchange of client information
ISO19100 series Geographic information
Open Geospatial Consortium (OGC) Web Feature Service (WFS) Implementation Specification 1.1.0 (OGC Document No. 04-094)
Open Geospatial Consortium (OGC) Web Map Service (WMS) Implementation Specification 1.3.0 (OGC Document No. 06-042)
The hydrological obstructions dataset provides a topological connection of linear and points features which interact with the hydrological network. The linear and point features are man-made structures which may obstruct or divert stream flow.
Data is maintained through numerous sources including satellite imagery, aerial photography, field work, information gathered from relevant stakeholders, custodians and by data verification and testing. Revision material has also been gathered from a variety of authoritative sources.
Spatial accuracy position of the feature instance will be within 0.5mm at map scale for 90% of the well-defined points.
1:25 000 = 12.5 m
1:50 000 = 25 m
1:100 000 = 50 m
1:250 000 = 125 m
The Dataset includes a unique spatial identifier for each feature. The identifier will be used to maintain the dataset and to incorporate higher resolution datasets in the future.
The aggregation of jurisdictional data is maintained by Geoscience Australia. A mixture of scale exists ranging from 1:25 000 to 1:250 000 across the continent.
The Bureau of Meteorology is the custodian of the suite of products to meet the requirements of the National Water Account under the Water Act 2007 and Water Regulations 2008 .
Short term objectives include:
Fully aggregate all jurisdictional data into a national dataset which provides a complete and consistent representation of the national surface hydrology network
Improve accuracy and quality information
Long term objectives include:
Continued spatial upgrades of all surface hydrology data using current and higher resolution imagery