Greater Darwin Land Suitability, Northern Territory

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:2024-04-26

Date Metadata Last Updated:2016-06-30

Current URL (HTML format) : http://www.ntlis.nt.gov.au/metadata/export_data?type=html&metadata_id=E6118908C3767DBCE040CD9B21441823

Current URL (XML format) : http://www.ntlis.nt.gov.au/metadata/export_data?type=xml&metadata_id=E6118908C3767DBCE040CD9B21441823

Citation

ANZLIC Identifier:E6118908C3767DBCE040CD9B21441823

Title: Greater Darwin Land Suitability, Northern Territory

Citation Date:2013-09-11

Date Type:creation

Custodian:Department of Environment, Parks and Water Security

Description

Abstract:

This spatial data set is a compilation of 10 existing land resource surveys that were reinterpreted to identify land suitable for annual and perennial horticultural potential and soil drainage classes. This compilation data set is relevant at a scale of 1:50,000. The study area in the Greater Darwin region covers more than 9,700 km2.

Information about the existing surveys is available in the associated metadata and technical reports. See list of surveys under Supplementary Information below.

This project was initiated by staff from Dept Lands Planning Environment and Dept Land Resource Management. Additionally, staff from Dept Primary Industry and Fisheries supplied a set of conditions to identify the extent of soil-landscapes generally suitable for annual and perennial horticulture. (see Data Dictionary below)

The land suitability mapping does not take into account the availability of groundwater. Groundwater information needs to be intersected with the land suitability mapping for a realistic assessment, unless surface water supplies can be utilised.

ANZLIC Search Words:

biota

environment

imageryBaseMapsEarthCover

Spatial Domain:

Bounding Coordinates:

North Bounding Coordinate:-12.142

South Bounding Coordinate:-13.527

East Bounding Coordinate:131.692

West Bounding Coordinate:130.333

Dataset Status

Dataset ID:

Language:English

Character Set: Latin 1

Progress:completed

Maintenance and Update Frequency:notPlanned

Data Currency Start Date:2013-09-01

Data Currency End Date:2013-09-11

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:The base mapping used for the interpretation was land unit mapping at a 25,000 scale but included a survey at 50,000 scale. The information should therefore be used at a scale of 1:50,000. However, this type of information was not available across the entire Coomalie Local Government Area so more generalised land type map was generally used. It was supported by a number of individual land unit datasets covering parts of the region, soil profile site information and 1:10,000 topographic datasets to aid an estimation of slope.

The 10 spatial datasets within the study area were merged and each polygon was assigned a horticulture potential and a drainage class.

Positional Accuracy:Polygon Data - Map unit boundaries digitised on screen directly from digital rectified aerial photographs. Level of accuracy depends on the number of control points on individual aerial photographs. Control points include creek lines, cadastre and other topographic features. Depending on the nature of the landscape (the number of control points), positional accuracy may vary. Positional accuracy generally considered high to very high.

Point Data - Site point coordinates derived from a geographic positioning system with general accuracy of within 10-50m.

Attribute Accuracy:Attributes assigned according to the dominant feature. For example, where ten sites have been grouped to describe a particular map unit and two different soils described from these sites then the dominant soil is chosen. Attribute values, as described in the Data Dictionary below, have been added to each polygon.

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:Three areas within the study area currently do not have appropriate land resource information to undertake an assessment. Broad scale information over these areas indicates that the large area to the south east of the township of Adelaide River is similar to the landscapes mapped on Marrakai, Mount Ringwood and Mount Bundey and therefore generally considered to have a low suitability for horticulture. The large area in the Finniss River area is considered similar to the mapped landscapes immediately to the north and north-west and largely considered unsuitable for horticulture. Topographic information across the small area to the south-west of the Adelaide River township indicates that the landscape is rugged and also considered to have low suitability for horticulture.

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

DRAINCLASS Alias: Drainage Classification
Soil drainage is a term used to summarise local soil wetness conditions that is likely to occur in most years. It is affected by internal soil and external landscape factors (National Committee on Soil and Terrain, 2009). Key landscapes attributes such as landform, soil properties and vegetation are used to assess and define 3 soil drainage classifications. Imperfect to poor

Poor to very poor

Rapid, well to moderately well

HORT_ANN Alias: Annual Horticulture Potential
Must have these 4 key soil landscape criteria - drainage, slope, rock outcrop and soil depth.
Where a land unit description does not meet any one of the soil and landscape attributes then it was considered to have an overall low horticultural suitability rating.
HIGH Drainage: Rapid to moderately - Well; Slope: <=2%; Rock Outcrop: <=10%; Soil Depth; >50 cm

LOW Drainage: Imperfect to very poor; Slope: >2%; Rock Outcrop: >10%; Soil Depth: <= 50 cm

HORT_PER Alias: Perennial Horticulture Potential
Must have these 4 key soil landscape criteria - drainage, slope, rock outcrop and soil depth.
Perennial horticulture generally requires deeper soil then annual horticulture to be considered suitable, thus the deeper soil requirement.
Where a land unit description does not meet any one of the soil and landscape attributes then it was considered to have an overall low horticultural suitability rating. HIGH Drainage: Rapid to moderately - Well; Slope: <=2%; Rock Outcrop: <=10%; Soil Depth: >100 cm;

LOW Drainage: Imperfect to very poor; Slope: >2%; Rock Outcrop: >10%; Soil Depth: <=100 cm;

MAP_UNIT Alias: Map Unit
Identifying label used to define the map unit polygon.

SURVEY_ID Alias: Survey Identifier
The first five characters from the corporate survey code.

SURVEY_NME Alias: Survey Name
The full name of the report to which the mapping refers

SURVORIGIN Alias: Survey Origin
The data is compiled from existing surveys. This field refers to the original survey code.

Attribute	Attribute Description	Possible Code	Code Description
DRAINCLASS	Alias: Drainage Classification Soil drainage is a term used to summarise local soil wetness conditions that is likely to occur in most years. It is affected by internal soil and external landscape factors (National Committee on Soil and Terrain, 2009). Key landscapes attributes such as landform, soil properties and vegetation are used to assess and define 3 soil drainage classifications.	Imperfect to poor
		Poor to very poor
		Rapid, well to moderately well
HORT_ANN	Alias: Annual Horticulture Potential Must have these 4 key soil landscape criteria - drainage, slope, rock outcrop and soil depth. Where a land unit description does not meet any one of the soil and landscape attributes then it was considered to have an overall low horticultural suitability rating.	HIGH	Drainage: Rapid to moderately - Well; Slope: <=2%; Rock Outcrop: <=10%; Soil Depth; >50 cm
		LOW	Drainage: Imperfect to very poor; Slope: >2%; Rock Outcrop: >10%; Soil Depth: <= 50 cm
HORT_PER	Alias: Perennial Horticulture Potential Must have these 4 key soil landscape criteria - drainage, slope, rock outcrop and soil depth. Perennial horticulture generally requires deeper soil then annual horticulture to be considered suitable, thus the deeper soil requirement. Where a land unit description does not meet any one of the soil and landscape attributes then it was considered to have an overall low horticultural suitability rating.	HIGH	Drainage: Rapid to moderately - Well; Slope: <=2%; Rock Outcrop: <=10%; Soil Depth: >100 cm;
		LOW	Drainage: Imperfect to very poor; Slope: >2%; Rock Outcrop: >10%; Soil Depth: <=100 cm;
MAP_UNIT	Alias: Map Unit Identifying label used to define the map unit polygon.
SURVEY_ID	Alias: Survey Identifier The first five characters from the corporate survey code.
SURVEY_NME	Alias: Survey Name The full name of the report to which the mapping refers
SURVORIGIN	Alias: Survey Origin The data is compiled from existing surveys. This field refers to the original survey code.

Supplementary Information

Department Survey Code: GTDLS_50 A report was not created for this dataset.

This is a compilation of 10 existing land resource surveys, including;
GTRDW_25 Land Resources Elizabeth, Darwin, Blackmore Rivers, Greater Darwin Area
MARRV_25 Land Resources of the Marrakai Area, NT
MTBUN_25 Land Units Mount Bundey Station, NT
MTRIN_25 Land Units of Mount Ringwood Station, NT
COOCL_25 Land Capability of the Coomalie Shire
DRDAM_25 Land Resources of the Darwin River Dam and Manton Dam Catchments NT
DUNDE_25 Land Resources of the Lower Finniss, NT
MANGB_25 Mangrove Survey of Bynoe Harbour, NT
MANGD_25 Mangrove Communities of Darwin Harbour, NT
WARRA_50 Land units, Erosion and Land Use within Catchment Area, Proposed Warrai Dam

Metadata is available for each survey for further information.

This record maintained using the NTLIS Metadata Tool

Metadata : Greater Darwin Land Suitability, Northern Territory