Metadata : Soil and Land Suitability Assessment for Irrigated Agriculture in the Larrimah Area, Sturt Plateau


Metadata Details:

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

Version: 1.0

Date Metadata Extracted: 2021-12-06

Date Metadata Last Updated: 2016-08-30

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ANZLIC Identifier: 16E0C03285D0E8CEE050CD9B21443D93

Title: Soil and Land Suitability Assessment for Irrigated Agriculture in the Larrimah Area, Sturt Plateau

Citation Date: 2016-02-03

Date Type: publication

Custodian: Department of Environment, Parks and Water Security



Version 1.
This spatial dataset provides polygon information delineating land unit boundaries at a scale of 1: 25 000 and describes the dominant landform, soils and vegetation of the Larrimah Area, Sturt Plateau, Northern Territory. The study area covers 427km2 and is located north-east of Larrimah. The primary purpose of the investigation was to map, describe and evaluate soil landscapes to inform future irrigation development in an area with identified potential for groundwater extraction. Core landform, soil and vegetation attributes attached to the land units are included with the spatial dataset. The project was conducted over 12 months from July 2014 to June 2015.

Map unit boundaries were derived using satellite imagery in association with a digital elevation model, geological and topographic data. Landform, soil and vegetation field assessments conform to national standards and support mapping at a scale of 1:25 000.
When assessing specific areas within the mapping it is recommended a site inspection is undertaken to establish unmapped variation and confirm mapping accuracy on the ground.
This map does not indicate, imply or ascertain the likelihood of groundwater availability or the granting of appropriate water extraction licensing needed to satisfy the irrigation requirements of the potential agricultural development options needed.

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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: 2014-10-01

Data Currency End Date: 2015-08-25

Access Constraint:

Download the spatial data package (contains spatial data, maps and reports) via

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:

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: Map unit boundaries delineated from digital satellite imagery (WorldView-2) and digital elevation model (SRTM-derived 1 second Smoothed DEM). Preliminary linework was captured on field map sheets. Field map sheets incorporated digital satellite imagery and DEM layers. Field map sheets with final linework were scanned and rectified. Linework digitised on screen directly from field map sheets.
Map unit boundaries derived using digital satellite imagery, DEM, geological and topographic data. Field data (site information) described and classified according to national standards at the time of capture.
Map unit polygons collected via geographic information system (ArcGIS/MapInfo). Core landform, soil and vegetation attributes attached to map units with additional attributes unique to this survey.

Positional Accuracy: POLYGON DATA - Map unit boundaries digitised on screen directly from digital rectified field maps. Level of accuracy depends on the number of control points on individual map sheets. Control points exclusively used were Map Grid of Australia (MGA) grid lines. 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 - 50 m.

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.

Each land unit has been attributed with a land suitability class to describe the potential for irrigated agricultural. Crops assessed have been grouped into 8 categories. For more information refer to Chapter 10 and Appendix 5 in the associated report.
Group 1. Cotton, grains (sorghum, maize, sweet corn, rice), pulses (mung bean, soybean)
Group 2. Peanut
Group 3. Sub-tropical grass hay/forage (Rhodes grass, panics, forage sorghum)
Group 4. Mango
Group 5. Citrus (lime, lemon, mandarin)
Group 6. Cucurbits (watermelon, hami melon, honeydew melon, rockmelon, pumpkin)
Group 7. Solanaceae (capsicum, chilli, eggplant, tomato), lettuce
Group 8T. (trickle tape irrigation) Carrot, onion, sweet potato
Group 8S. (overhead spray irrigation) Carrot, onion, sweet potato

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 1 is complete. If amendments are made to this dataset, a new version will be released.


Data Requests OfficerDepartment of Environment, Parks and Water SecurityGeospatial Services Branch (on behalf of department)

Data Dictionary

AttributeAttribute DescriptionPossible CodeCode Description
EROS_POTAlias: Erosion Potential
Classes: Low, Moderate, Moderate to High, High
LAND_UNITAlias: Land Unit
The LAND_UNIT field is the land unit label from the spatial dataset (ie 9a2).
LF_CLASSAlias: Landform Class
Landform class is a system adopted by the department. The categories do not conform to national criteria even though some have been sourced from Australian Soil and Land Survey - Field Handbook (Mc Donald 1998).
LF_DESCAlias: Landform Description
Landform description includes details about landform, and general notes pertaining to slope, surface gravel and other details describing the land unit.
LSC_G1 (to G8)Alias: Land Suitability Class for Irrigated Crops Group1 to Group 8.
Each land unit has been attributed with a land suitability class between 1 and 5.

Group 1 - Irrigated cottong, grains and pulses; Group 2 - Irrigated peanuts; Group 3 - Irrigated subtropical grass hay/forage crops; Group 4 - Irrigated mangoes; Group 5 - Irrigated citrus; Group 6 - Irrigated cucubits; Group 7 - Irrigated Solanaceae crops and lettuce; Group 8T - Trickle Irrigated root crops; Group 8S - Overhead spray irrigated root crops.
1Class Definition: Suitable land with negligible limitations. Description: Highly productive land requiring only simple management practices to maintain sustainable production.
2Class Definition: Suitable land with minor limitations. Description: Land with minor limitations that either constrain production or require more than the simple management practices of Class 1 land to maintain sustainable production.
3Class Definition: Suitable land with moderate limitations. Description: Land with moderate limitations that further constrain production or require more than the management practices of Class 2 land to maintain sustainable production.
4Class Definition: Unsuitable land with severe limitations. Description: Land with severe limitations that preclude successful or sustained use under current conditions. Future changes in knowledge, economics or technology may alter this.
5Class Definition: Unsuitable land with extreme limitations. Description: Land with extreme limitations that preclude any possibility of successful or sustained use, either now or in the future.
SOILAlias: Dominant Soil Order
The dominant soil order described in a land unit is recorded.
SOIL_DESCAlias: Soil Description
Soil description includes an ASC or Northcote/other soil classification and usually includes colour, soil depth and other notes describing the soil.
SOIL_SYSAlias: Soil Classification System
The soil classification system used to describe the soil in the land unit description
SPECIES_1Alias: Veg Dom Species 1
The dominant vegetation species described in a land unit. The order of species listed determines their dominance.
SPECIES_2Alias: Veg Dom Species 2
The dominant vegetation species described in a land unit. The order of species listed determines their dominance.
SPECIES_3Alias: Veg Dom Species 3
The dominant vegetation species described in a land unit. The order of species listed determines their dominance.
SURVEY_IDAlias: Survey Identifier
A department code that usually refers to the first five characters from the original survey site sheet.
SURVEY_NMEAlias: Survey Name
The name of the survey area or report to which the mapping refers
VEG_DESCAlias: Vegetation Description
The dominant species and its structure are recorded. Occasionally it will include `minor' vegetation communities also noted in the land unit description and/or notes specific to the community.
VEG_STRUCAlias: Dominant Veg Structure
Vegetation structural classes from NVIS (ESCAVI 2003), Walker and Hopkins (1998) and Specht (1970) classification schemes
VEG_SYSAlias: Veg Classification System
The National Vegetation Information System (NVIS) classification system.

Supplementary Information

Department Survey Code (Land Unit survey): LARRI_25

Bibliographic Reference: Burgess J, McGrath N, Andrews K and Wright A (2015)
Agricultural Land Suitability Series, Report 1. Soil and Land Suitability Assessment for Irrigated Agriculture in the Larrimah Area, Sturt Plateau.
Technical Report 19/2015D, Department of Land Resource Management, Darwin, NT.

Download Technical Report (PDF) via NT Library; see
A series of map products have also been created for this survey. They are available to download (PDF) via the on-line mapping system NR Maps (using the Map Products layer).

Groundwater Assessment North Mataranka to Daly Waters
Download technical report via NT Library:
Map product:

This record maintained using the NTLIS Metadata Tool