Geofabric Surface Network - V2.1.1

ISO-19139 Metadata:

• Metadata Information
• Resource Identification Information
• Reference System Information
• Data Quality Information
• Distribution Information

Metadata Information:

Metadata language: eng

Metadata character set: utf8

Last update: 2014-08-07

Metadata constraints:

Security constraints:

Classification: unclassified

Metadata contact - pointOfContact:

Individual's name: Geospatial Data Unit

Organization's name: Bureau of Meteorology, Information Systems and Services Division

Contact's position: Geofabric Project Manager

Contact information:

Phone:

Address:

Delivery point:

 GPO Box 2334

City: Canberra

Administrative area: ACT

Postal code: 2601

Country:Australia

e-mail address: ahgf@bom.gov.au

Resource Identification Information:

Citation:

Title: Geofabric Surface Network - V2.1.1

Alternate titles: Geofabric Surface Hydrology Network 1:250,000 scale 2014,

Reference date - creation: 2014-06

Reference date - publication: 2014-06-20

Reference date - revision: 2014

Other citation details: ANZCW0503900104

Themes or categories of the resource: environment, transportation, structure, location, inlandWaters

Theme keywords:

Keywords: auxiliary

Citation:

Title: OSDM schedule names

Reference date - revision: 2008-11-10

Edition: Version 1.1

Edition date: 2008-11-10

Party responsible for the resource - custodian:

Organization's name: Office of Spatial Data Management

 The Geofabric Surface Network product provides a set of related feature classes to be used as the basis for production of consistent hydrological surface stream network analysis. This product contains a topographically consistent representation of the (major) surface water features of Australia (excluding external territories). Primarily, these are natural surface hydrology features but the product also contains some man-made features (notably reservoirs and other hydrographic features).

The Geofabric Surface Network product is based upon the input from ANUDEM Derived Streams V1.1.2 (ANUDEM Streams) which is the vectorised version of the nine second ANUDEM derived raster steams product.  The product is related to, but distinct from, the stream network contained in the Geofabric Surface Cartography product.  The network product represents the flow direction of streams over the surface of the terrain, based on the GEODATA Nine Second Digital Elevation Model (DEM-9S) Version 3.  This product is more generalised than the Geofabric Surface Cartography and represents the main channels of the stream, particularly in areas where streams are heavily anabranched or disconnected.  

In addition, the stream connectivity represents a stream flow over the terrain, regardless of the presence of a corresponding Geofabric Surface Cartography stream segment.  This means that the Geofabric Surface Cartography product may represent a stream as an interrupted or intermittent feature, whereas this product represents the same stream as a continuous connected feature. That is, the path that a stream would take (according to the terrain model) if sufficient water were available for flow.  This product is fully topologically correct which means that all the stream segments flow in the correct direction.  It also has full connectivity based on the flow of water across a terrain model.  

This product contains six feature types including: Waterbody, Network Stream, Network Node, Catchment, Network Connectivity (Upstream) and Network Connectivity (Downstream).

 This product contains a topographic representation of the (major) surface water features of ‘geographic Australia’ excluding external territories. It is intended to be used as the basis for production of consistent surface stream network analysis.
Geofabric Surface Network is intended to be used in stream flow tracing operations, using its full topological connection.  The product can support the spatial selection of associated hydrological features as inputs for spatial analysis/modelling.
This product is intended to supplement the Geofabric Surface Cartography, Geofabric Surface Catchments and Geofabric Hydrology Reporting Catchments data products. This product is also used to support the definition of the Geofabric Surface Catchments and Geofabric Hydrology Reporting Catchments products and provides a spatial framework for analysis and assessment of streams and their catchments.

Security constraints:

Classification: unclassified

Legal constraints:

Access constraints: license,

Limitations of use: Licenced for use under Creative Commons Australia Attribution. We request attribution as © Commonwealth of Australia (Bureau of Meteorology) 2014

Legal constraints:

Use constraints:

Legal constraints:

Use constraints:

Legal constraints:

Use constraints:

Limitations of use: Licenced for use under Creative Commons Australia Attribution. We request attribution as © Commonwealth of Australia (Bureau of Meteorology) 2014.

 Geoscience Australia

 CSIRO, Water for a Healthy Country

 ANU, Fenner School of Environment and Society

Reference System Information:

Reference system identifier:

Value: 4283

Value: GCS_GDA_1994

Data Quality Information:

Scope of quality information:

Level of the data: dataset

dataset

Lineage:

Lineage statement:

 Geofabric Surface Network is part of a suite of Geofabric products produced by the Australian Bureau of Meteorology. The geometry of this product is largely derived from the ANUDEM Derived Streams V1.1.2 (ANUDEM Streams).  It consists of water bodies such as swamps, reservoirs, lakes, etc as derived from AusHydro V1, as well as the stream lines and stream line connectors through these water bodies. The ANUDEM Streams are firstly vectorised to be usable in vector line feature format and are then informed and modified by the coincident locations of the AHGFMappedStream feature class. The features are organised into specific feature class subtypes, based upon both the inputs from the AusHydro V1.7.2 and their behaviour within the AHGF Network Stream relationships.  All of the AHGFNetworkStream and AHGFWaterbody features participate in the connected stream flow topology.  

This product also contains the AHGFCatchment features that are derived from the National Catchment Boundaries V1.1.4.  The AGHFCatchment feature class consist of the lowest level stream flow catchments based upon the inputs from ANUDEM Streams. The catchment boundaries are based upon a single AHGFNetworkStream extent over GEODATA National 9 Second DEM grid. These catchments form the basis of aggregated catchment boundaries, either by Contracted Nodes or by Pfafstetter ID Levels.

All of these features participate in the connected stream flow topology.

Processing steps: 
1. ANUDEM Streams dataset is received and loaded into the Geofabric development GIS environment. 
2. Feature classes from ANUDEM Streams are recomposed into composited Geofabric Feature Dataset Feature Classes in the Geofabric Maintenance Geodatabase.
3. Re-composited feature classes in the Geofabric Maintenance Geodatabase Feature Dataset are assigned unique Hydro-IDs using ESRI ArcHydro for Surface Water (ArcHydro: 1.4.0.180 and ApFramework: 3.1.0.84).
4. Feature classes from the Geofabric Maintenance Geodatabase Feature Dataset are extracted and reassigned to the Geofabric Surface Network Feature Dataset within the Geofabric Surface Network Geodatabase.

A complete set of data mappings, from input source data to Geofabric Products, is included in the Geofabric Product Guide, Appendices. 

Changes at v2.1
    ! Addition of Beta Monitoring Point Table including 479 ghost nodes
      connected to the network.
    - New Water Storages in the WaterBody FC.

Changes at v2.1.1
    ! Replacement of Beta Monitoring Point Table and inclusion of 3,310
    (formerly 479) ghost nodes connected to the stream network.

    ! 16 New BoM Water Storages attributed in the AHGFWaterBody feature class
    and 1 completely new water storage feature added.

    - SegnoLink attribute update to fix single catchment feature in Tasmania.

    - Correction to spelling of Numeralla river in AHGFMappedStream (formerly
    Numaralla).

    ! Metadata updated adding explanation of AHGFNetworkStream AusHydroEr codes
    and revision made to description of DrainID field.

    - Fixed a series of NoFlow catchments (small internally draining catchments
    not related to a stream segment) in Murray-Darling were incorrectly
    attributed as externally draining via the ExtrnlBasn field in
    AHGFCatchments.

    ! Usage of the MergedSink attribute changed from v2.1 (see
    HR_Catchments_Technical_Overview.pdf for more info).

Distribution Information:

Distributor:

Distributor information - pointOfContact:

Individual's name: Geospatial Data Unit

Organization's name: Bureau of Meteorology, Information Systems and Services Division

Contact's position: Geofabric Project Manager

Contact information:

Phone:

Voice:

Fax:

Address:

Delivery point:

 GPO Box 2334

City: Canberra

Administrative area: ACT

Postal code: 2601

Country:Australia

e-mail address: ahgf@bom.gov.au

Format:

Format name: ESRI File Geodatabase

Format version: V 9.3

Transfer options:

Online resource:

Name of resource: Downloadable Data

Online location:http://www.bom.gov.au/water/geofabric/download.shtml