Metadata : Land Systems of the Northern Part of the NT (1:250,000)

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Metadata Details:

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

Version:1.0

Date Metadata Extracted:2024-04-18

Date Metadata Last Updated:2018-10-11

Current URL (HTML format) : http://www.ntlis.nt.gov.au/metadata/export_data?type=html&metadata_id=8E85C28F9C9285EBE040CD9B21447F57

Current URL (XML format) : http://www.ntlis.nt.gov.au/metadata/export_data?type=xml&metadata_id=8E85C28F9C9285EBE040CD9B21447F57


Citation

ANZLIC Identifier:8E85C28F9C9285EBE040CD9B21447F57

Title: Land Systems of the Northern Part of the NT (1:250,000)

Citation Date:2008-01-01

Date Type:creation

Custodian:Department of Environment, Parks and Water Security


Description

Abstract:

VERSION 2 (current as at November 2012)

The spatial dataset LAND SYSTEMS OF THE NORTHERN PART OF THE NT (1:250,000) is a compilation of 16 existing Land System surveys across the northern part (approx 30%) of the Northern Territory.

Published maps were digitsed and edited to accommodate overlaps, gaps and mismatching boundaries. Where possible, these land system descriptions have been extrapolated into areas where previously covered by the broader scale (1:1,000,000) land systems. Additionally 'interim' land system designation have been assigned to areas where little or no field data is currently available. These may be validated when field information is available.

This spatial dataset is also further described with Vegetation attributes based on individual survey reports. They were compiled, collated and consolidated across all survey areas to develop a consistent set of vegetation attributes across the greater survey area.

Land system mapping is largely a descriptive approach to displaying and documenting information on landscapes. While the conversion of this information into a qualitative database format allows for more immediate and versatile analyses, caution must be adopted where necessary, as this has exceeded the intent of the original work. This dataset continues to be developed as part of the Northern Territory's contribution to ASRIS, the Australian Soil Resource Information System (www.asris.csiro.au)

See note under Completeness.

ANZLIC Search Words:

Spatial Domain:

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Dataset Status

Dataset ID:

Language:English

Character Set: Latin 1

Progress:completed

Maintenance and Update Frequency:notPlanned

Data Currency Start Date:2008-01-01

Data Currency End Date:2015-07-22

Access Constraint:

Download the spatial data package (contains spatial data, maps and reports) via data.nt.gov.au/

You are licensed to use the DENR 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:

Supplied by the Department of Environment and Natural Resources. Copyright Northern Territory Government.


Data Quality

Lineage:Land system surveys (1:250,000) have been undertaken in the NT since 1961. These surveys involved mapping boundaries on aerial photographs, collection and collation of extensive field information and ultimately the production of a report and series of maps. In some cases these surveys were very specific to their particular project area and no correlation was made with previous or adjoining work. In amalgamating these surveys modifications to some of the original interpretations has been necessary.

There are currently 351 land systems that describe the northern part of the Northern Territory. 257 of these have been taken from published reports, the other 94 have been drafted from other sources and in many cases are interim designations.

Data was compiled from the following existing land resource surveys:
- General Report on Lands of the Tipperary Area, 1961.
- Lands of the Adelaide-Alligator Area, 1969.
- Lands of the Ord-Victoria Area, Western Australia and Northern Territory, 1970.
- Land System Survey of Eva Valley Station and Surrounding Vacant Crown Land, 1973
- Lands of the Alligator Rivers Area, 1976
- Land Systems of the Port Keats Area, 1972
- Land Systems of the Dry River Area, 1978
- Land Systems of the Western Half of Melville Island, 1978
- National Park Value of Gimbat and Goodparla Pasture Leases, 1979
- Land Systems of the Upper McArthur River Catchment, 1981
- Land Resources of Katherine Gorge National Park, 1984
- Land Systems of Finniss River Station, 1984
- Land Systems of the Darwin Region, 1985
- Land Resources of the Sturt Plateau, 1985
- Land Resources of Cobourg Peninsula, 1986
- Land Systems of the Southern Gulf Region, 1990
- Land Systems of the Roper River Catchment, 1992
- Land Systems of Arnhem Land, 1998

Positional Accuracy:The legacy of inaccuracies associated with capturing historical paper mapping is still very much a feature of this coverage. Mapping boundaries have been scanned and digitised from paper maps. When overlain on a satellite image, the intention of the mapped boundaries is apparent, although the positional accuracy is still dependent on original map product.

Attribute Accuracy:Many of the original Land System maps were only attributed with a mapunit (generally an abbreviation of the land system name from the accompanying report).

The attribution of the spatial dataset continues to be a time intensive process involving repetitive perusal of published reports. A number of general purpose fields have been added to the dataset to add to its versatility and purpose, as well as keep account of its derivation and various modifications to it. Some of these are incomplete or still in progress.

SOIL and VEGETATION attributed tables have been joined via relationship classes to an ESRI File Geodatabase format. Descriptive information about these tables is available via this department.

Species nomenclature for vegetation mapunit descriptions reflects the original taxonomic nomenclature detailed in the relevant Land Resource report. Consequently, these may not reflect the currently accepted species nomenclature for the Northern Territory and caution should be exercised in the application of this information where taxonomic accuracy is a consideration. Current nomenclature should be verified with the relevant institutions (e.g. the Northern Territory or Australian National Herbaria).

Logical Consistency:GIS editing tools were used to rectify all overshoots and undershoots in line work. Polygon topology rules applied are; must not overlap, must not have gaps and each polygon has only one label.

Completeness:Version 2 - current as at November 2012. This is a work in progress, although several releases or versions will be made available as work progresses.

22/07/2015 The Vegetation NVIS lookup table was amended for Feature ID Bundah. The Dominant Vegetation Structure was incorrectly noted as Shrubland and has been amended to Open Woodland. Please note that these polygons will be incorrectly displayed in several map products.


Contacts

NameOrganisationPositionRolePhoneFaxEmail
Data Requests OfficerDepartment of Environment, Parks and Water SecurityGeospatial Services Branch (on behalf of department)distributordatarequests.depws@nt.gov.au

Data Dictionary

AttributeAttribute DescriptionPossible CodeCode Description
ACID_S_SAlias field name: Acid Sulphate Soils
Occurrence of acid sulfate (sulphate) soils
CLASSAlias field name: Landscape Class
The landscape class is based on the geomorphological groupings used in some of the land system reports. These have been derived by grouping land systems based on a combination of the underlying geology, landform and landscape forming processes. CLASS (landscape class) provides a brief summary description useful for map production. A more detailed description is provided in CLASS_DESC (Landscape class description)
CLASS_DESCAlias field name: Landscape Class Description
The landscape class description is based on the geomorphological groupings used in some of the land system reports. These have been derived by grouping land systems based on a combination of the underlying geology
EROS_RISKAlias field name: Risk of soil erosion.
This is an overall subjective assessment of how land will respond to an assumed disturbance. This has been estimated by considering the combined interactions of landform (particularly slope), soil type (for erodibility), flooding and less commonly wind (for coastal dunefields). The components (land units) of each land system have not been considered individually with in this overall assessment and may vary considerably in their respective susceptibilities to erosion.
FEATURE_IDAlias field name: Feature Identification
This field provides the link to the ASRIS (Australian Soil Information System) data model for landform and idealised soil attributes. In most cases it is equivalent to the land system.
LANDSYSTEMAlias field name: Land System
Name of land system. This is the current name of the land system. Generally these are the names used in the original work although some modifications have been necessary to facilitate the amalgamation the various projects.
L_SYS_ORIGAlias field name: Original Land System
MAPUNITAlias field name: Map Unit
This is the current revised code to provide symbols for legends in map production. Generally these are an abbreviation of the land system name, except for the Gulf and Roper surveys. Many of these have been modified from the originals to resolve duplication of some symbols.
MAP_U_ORIGAlias field name: Original Mapunit
SCALEAlias field name: Survey Scale
The mapping scale has been set to a standard scale of 1:250,000. The mapping for the Darwin region, Cobourg Peninsula, Katherine Gorge (1:100,000) and Port Keats (approx.. 1:150,000) have been considered to be equivalent to the majority of the remaining mapping scale. Statements on mapping accuracies are not available, but an indication of the intent and accuracy of the mapping boundaries can be judged when overlain on satellite imagery (Google Earth).
SURVEYAlias field name: Original Survey Report
In most cases this refers to the original source of mapping. However, where modifications have been made to accommodate edge-matching, gaps and overlaps the ASRIS value has been allocated. Original survey boundaries for this project, NORTH_250, are available from this department.
SURVEY_IDAlias field name: Survey Identification
Survey identifcation code assigned by this department.
SURVEY_NMEAlias field name: Survey Name
The name of this spatial data compilation survey
UPDATEDAlias field name: Date of Version
Date when version is updated
VERSION_NOAlias field name: Dataset Version
Numeric version number
ZONEAlias field name: Landscape zone.
This regionalisation is a revisit of some of the earlier options of the IBRA regions using the current land system mapping. It is based on surficial landscape features (geology, landform and soil) and where possible distinct landscape demarcations (escarpments, geology) have been used to align the boundaries with features that are generally recognisable on the ground. In most cases there should be good correlation with the intent of the IBRA regions, which incorporate additional ecological information.

Supplementary Information

Department Survey Code: (Land Systems) NORTH_250

A technical report (18.5 mb) and also a summary of the land system descriptions (1.3 mb) may be downloaded (pdf) from the Northern Territory Library; hdl.handle.net/10070/253063
Bibliographic References: Lynch B., Cuff N., Green C. (Oct, 2012)
Summary of the Origin and Derivation of the 1:250,000 Land System Descriptions for the Northern Part of the Northern Territory, DRAFT.
Land Resource Assessment Unit, Department of Land Resource Management, Palmerston, Northern Territory

A map series has been created for this land system survey using the 250k topographic sheets. These pdf maps contain layers that may be turned on or off for display.
The overview INDEX MAP contains web-links to all the map sheets in this series; www.ntlis.nt.gov.au/mpds/get_file?file_id=6422

For addtional information relating to the Land Resource attributes refer to www.asris.csiro.au
Report reference: McKenzie NJ et al (2005) The Australian Soil Resource Information System Technical Specifications; Australian Collaborative Land Evaluation Program. CSIRO.

This record maintained using the NTLIS Metadata Tool