Northern Territory Sub-catchments

Index:

Metadata
Citation
Description

Dataset Status
Data Quality
Contact Information
Data Dictionary
Supplementary Information

Metadata Details:

Name:AS/NZS ISO 19115 Geographic Information - Metadata, ANZLIC Metadata Profile

Version:1.0

Date Metadata Extracted:2024-11-22

Date Metadata Last Updated:2022-04-29

Current URL (HTML format) : http://www.ntlis.nt.gov.au/metadata/export_data?type=html&metadata_id=824D669BF1DBACE2E050CD9B2144575C

Current URL (XML format) : http://www.ntlis.nt.gov.au/metadata/export_data?type=xml&metadata_id=824D669BF1DBACE2E050CD9B2144575C

Citation

ANZLIC Identifier:824D669BF1DBACE2E050CD9B2144575C

Title: Northern Territory Sub-catchments

Citation Date:2014-06-20

Date Type:creation

Custodian:Department of Environment, Parks and Water Security

Description

Abstract:

This polygon spatial dataset displays sub-catchments over the Northern Territory including a 70 km buffer beyond the border.
The data was sourced from the Australian Hydrological Geospatial Fabric (AHGF Geofabric) V2.1.1 via the Commonwealth of Australia (Bureau of Meteorology).

The original data, Contracted Catchments, has been renamed to Sub-catchments to provide a better understanding of the data name. This data is displayed in the Department's on-line web mapping system NR Maps. nrmaps.nt.gov.au/nrmaps.html

Caution for use: The sub-catchment (contracted catchment) boundaries describe no flow areas within the Victoria-Wiso Basin. The modelling has impacted the boundary extent of Regional Catchments created for Geofabric. Catchment boundaries previously displayed by the Australian Surface Water Management Areas 2000 (ASWMA) are no longer displayed. These particular areas should be used with caution.

Notes about original data: The AGHFContractedCatchments are based upon the fully disaggregated stream segment level catchments derived from GEODATA 9 second DEM foundation data. These data define a catchment for every stream segment in the Surface Network product. The AHGFContractedCatchments is the set of predefined aggregated catchments. This is the component of the product whose outflow node is a Contracted Node that is guaranteed to persist.

ANZLIC Search Words:

geoscientificInformation

inlandWaters

Spatial Domain:

Bounding Coordinates:

North Bounding Coordinate:-10

South Bounding Coordinate:-26

East Bounding Coordinate:138

West Bounding Coordinate:129

Dataset Status

Dataset ID:

Language:English

Character Set: Latin 1

Progress:completed

Maintenance and Update Frequency:notPlanned

Data Currency Start Date:2005-07-01

Data Currency End Date:2014-07-01

Access Constraint:Download the spatial data package via data.nt.gov.au/

You are licensed to use the geospatial products on the terms and conditions set out in: Creative Commons Attribution 4.0 International Public License (CC BY 4.0) at: creativecommons.org/licenses/by/4.0/legalcode

If you do not agree to the terms and conditions you must not use the geospatial products.

You are free to copy, communicate and adapt the licensed material, provided that you abide by the licence terms (including Attribution) and attribute the licensed material using the statement:

This data was modified by the Northern Territory Department of Environment, Parks and Water Security and originally supplied by (Copyright) Commonwealth of Australia (Bureau of Meteorology) 2020.

Data Quality

Lineage:Data source: Geofabric V2.1.1; SH_Catchments.GDB; Feature Class: AHGFContractedCatchments
Download complete datasets from Bureau of Meterology: www.bom.gov.au/water/geofabric/

ESRI ArcGIS V10.5 was used to clip the Australian wide dataset to 70km beyond the borders of the Northern Territory. Several fields were removed to reduce the file size and improve display. The domain list for the Feature Type was used to create the new field Feature Type Description. See Data Dictionary.

Positional Accuracy:For a better understanding of the Catchments information read the Australian Hydrological Geospatial Fabric (Geofabric) Product Guide. www.bom.gov.au/water/geofabric/documentation.shtml

The Contracted Areas are intended to provide the building blocks for reporting regions such as those given in Geofabric Hydrology Reporting Regions.

Attribute Accuracy:Each polygon contains attributes noted in the Data Dictionary in this metadata record.

Logical Consistency:Each polygon has a label point.

Completeness:Complete

Contacts

Name Organisation Position Role Phone Fax Email

Data Requests Officer Department of Environment, Parks and Water Security Geospatial Services Branch (on behalf of department) distributor datarequests.depws@nt.gov.au

Name	Organisation	Position	Role	Phone	Fax	Email
Data Requests Officer	Department of Environment, Parks and Water Security	Geospatial Services Branch (on behalf of department)	distributor			datarequests.depws@nt.gov.au

Data Dictionary

Attribute Attribute Description Possible Code Code Description

1. HydroID Unique identifier for the feature within the original geodatabase; SH_Catchments.GDB

2. AHGFFType Alias: Feature Type

22 - Contracted Area
23 - Non Contracted Area
24 - No Flow Area

2. AHGFTDesc Alias: Feature Type Description
Contracted Area: the upstream catchment area draining to a contracted node that participates in the simplified node-link network. It identifies the area upstream that will drain to that node (bounded wherever other upstream contracted nodes are encountered).

Non Contracted Area: the upstream catchment area draining to areas with contracted nodes of low confidence level (i.e. catchments containing AHGFNetworkStream features without corresponding AHGFMappedStream features)

No Flow Area: areas lacking both related network stream features and sensible catchments with which to be merged such as small islands.

3. ConLevel Alias: Confidence Level
Confidence level of related logical AHGF contracted node and relating to mapped streams confluences.
Level 1: Confidence Highest; using a named attribute with Major hierarchy.
Level 2: Confidence High; using a named attribute with Major or Minor hierarchy.
Level 4: Confidence Low; unnamed/empty attribute with minor/empty hierarchy.

4. ConCatID Alias: Contracted Catchment ID
Unique Identifier within the original geodatabase; SH_Catchments.GDB

5. AlbersArea Area calculated in m2
using Albers equal area projection

Attribute	Attribute Description	Possible Code	Code Description
1. HydroID	Unique identifier for the feature within the original geodatabase; SH_Catchments.GDB
2. AHGFFType	Alias: Feature Type 22 - Contracted Area 23 - Non Contracted Area 24 - No Flow Area
2. AHGFTDesc	Alias: Feature Type Description Contracted Area: the upstream catchment area draining to a contracted node that participates in the simplified node-link network. It identifies the area upstream that will drain to that node (bounded wherever other upstream contracted nodes are encountered). Non Contracted Area: the upstream catchment area draining to areas with contracted nodes of low confidence level (i.e. catchments containing AHGFNetworkStream features without corresponding AHGFMappedStream features) No Flow Area: areas lacking both related network stream features and sensible catchments with which to be merged such as small islands.
3. ConLevel	Alias: Confidence Level Confidence level of related logical AHGF contracted node and relating to mapped streams confluences. Level 1: Confidence Highest; using a named attribute with Major hierarchy. Level 2: Confidence High; using a named attribute with Major or Minor hierarchy. Level 4: Confidence Low; unnamed/empty attribute with minor/empty hierarchy.
4. ConCatID	Alias: Contracted Catchment ID Unique Identifier within the original geodatabase; SH_Catchments.GDB
5. AlbersArea	Area calculated in m2 using Albers equal area projection

Supplementary Information

For more information about the Geofabric - visit Bureau of Meterology: www.bom.gov.au/water/geofabric/

This record maintained using the NTLIS Metadata Tool

Metadata : Northern Territory Sub-catchments