Land unit compilations at various scales

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:2025-06-12

Date Metadata Last Updated:2020-02-03

Current URL (HTML format) : http://www.ntlis.nt.gov.au/metadata/export_data?type=html&metadata_id=8F67A0A8909520BFE0530101007F30EC

Current URL (XML format) : http://www.ntlis.nt.gov.au/metadata/export_data?type=xml&metadata_id=8F67A0A8909520BFE0530101007F30EC

Citation

ANZLIC Identifier:8F67A0A8909520BFE0530101007F30EC

Title: Land unit compilations at various scales

Citation Date:2010-01-01

Date Type:publication

Custodian:Department of Environment, Parks and Water Security

Description

Abstract:

These groups of polygon spatial datasets are compilations of existing land unit datasets where department has described the land units information using a standard set of core attributes that describe the dominant landform, soils and vegetation. The datasets have been merged together by like scale for presentation in NR Maps. The group scales are 25k, 50k and 100k and extend across the entire Northern Territory.

Each data compilation is displayed twice in NR Maps however the descriptive attributes are identical. Eg Landunit 25k displays just the outline of each polygon. Landunit 25k Landform displays the polygons grouped by dominant landform.

See NR Maps. http://nrmaps.nt.gov.au/nrmaps.html
- Layer: eg. Landunit 25k - To find the source for each dataset, refer to the attribute field Survey ID.
- Layer: Land Resource Surveys Finer Scale - Each polygon represents the survey extents and contains details describing the survey and also includes links to the report, individual metadata record, download spatial data package and maps if available.
- Layer: SALI soil profile descriptions (SALI - soil and land information) Each point describes soil profile and landform descriptions.

ANZLIC Search Words:

biota

environment

geoscientificInformation

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:onGoing

Maintenance and Update Frequency:continual

Data Currency Start Date:2000-01-14

Data Currency End Date:2019-01-01

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:Each completed land resource survey is stored as an individual dataset in an Oracle database using the survey identifier. (eg AUV15)199) The surveys are merged only for data display in NR Maps. The merged display is not stored as a data compilation. An associated survey extent for each dataset contains details describing the survey and also includes web links to the report, individual metadata record, download spatial data package and maps if available.

Refer to each survey metadata record to find lineage details for the map unit boundaries.

1998 to 2013 - Map unit boundaries delineated from aerial photographs. Aerial photography scanned and rectified. Linework digitised on screen directly from original aerial photographs.

2014 to current date - 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.

Positional Accuracy:Each survey was mapped at a specific scale. Enlarging the data beyond the scale will not provide further detail. A site inspection should always accompany mapping for specific areas.

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

1998 to 2013 - 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.

2014 to current - 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 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.

Attribute Accuracy:Each polygon contains a value for each of the attributes described in the Data Dictionary in this metadata record.

Logical Consistency:Caution: This merged dataset may contain overlapping polygons.

Each dataset is completed using GIS editing tools 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:This dataset is updated for display in NR Maps as required.

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

01. SURVEY_NME Alias: Survey Name
The name of the survey area or report to which the mapping refers.

02. SURVEY_ID Alias: Survey Identifier
- A department code used for storage purposes that usually refers to the first five characters from the original survey site field sheet.
- Overlay layer from folder: the Land Resource Survey Index; Land Resource Surveys Finer Scale. Make this the Active Layer.
- Review the survey details over your area of interest. Download associated reports, maps or spatial data as required.

03. LANDUNIT Alias: Land Unit
The LAND_UNIT field is the land unit label from the spatial dataset (ie 9a2).

04. LF_CLASS Alias: 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 et.al. 1998).

05. SOIL_SYS Alias: Soil Classification System
The soil classification system used to describe the soil in the land unit description

06. SOIL Alias: Dominant Soil Order
The dominant soil order described in a land unit is recorded.

07. VEG_SYS Alias: Veg Classification System
The National Vegetation Information System (NVIS) classification system.

08. VEG_STRUC Alias: Dominant Veg Structure
Vegetation structural classes from NVIS (ESCAVI 2003), Walker and Hopkins (1998) and Specht (1970) classification schemes

09. SPECIES_1 Alias: Veg Dom Species 1
The dominant vegetation species described in a land unit. The order of species listed determines their dominance.

10. SPECIES_2 Alias: Veg Dom Species 2
Where 2 dominant vegetation species were described in a land unit. The order of species listed determines their dominance.

11. SPECIES_3 Alias: Veg Dom Species 3
Where 3 dominant vegetation species described in a land unit. The order of species listed determines their dominance.

12. LF_DESC Alias: Landform Description
Landform description includes details about landform, and general notes pertaining to slope, surface gravel and other details describing the land unit.

13. SOIL_DESC Alias: Soil Description
Soil description includes an ASC or Northcote/other soil classification and usually includes colour, soil depth and other notes describing the soil.

14. VEG_DESC Alias: 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.

Attribute	Attribute Description	Possible Code	Code Description
01. SURVEY_NME	Alias: Survey Name The name of the survey area or report to which the mapping refers.
02. SURVEY_ID	Alias: Survey Identifier - A department code used for storage purposes that usually refers to the first five characters from the original survey site field sheet. - Overlay layer from folder: the Land Resource Survey Index; Land Resource Surveys Finer Scale. Make this the Active Layer. - Review the survey details over your area of interest. Download associated reports, maps or spatial data as required.
03. LANDUNIT	Alias: Land Unit The LAND_UNIT field is the land unit label from the spatial dataset (ie 9a2).
04. LF_CLASS	Alias: 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 et.al. 1998).
05. SOIL_SYS	Alias: Soil Classification System The soil classification system used to describe the soil in the land unit description
06. SOIL	Alias: Dominant Soil Order The dominant soil order described in a land unit is recorded.
07. VEG_SYS	Alias: Veg Classification System The National Vegetation Information System (NVIS) classification system.
08. VEG_STRUC	Alias: Dominant Veg Structure Vegetation structural classes from NVIS (ESCAVI 2003), Walker and Hopkins (1998) and Specht (1970) classification schemes
09. SPECIES_1	Alias: Veg Dom Species 1 The dominant vegetation species described in a land unit. The order of species listed determines their dominance.
10. SPECIES_2	Alias: Veg Dom Species 2 Where 2 dominant vegetation species were described in a land unit. The order of species listed determines their dominance.
11. SPECIES_3	Alias: Veg Dom Species 3 Where 3 dominant vegetation species described in a land unit. The order of species listed determines their dominance.
12. LF_DESC	Alias: Landform Description Landform description includes details about landform, and general notes pertaining to slope, surface gravel and other details describing the land unit.
13. SOIL_DESC	Alias: Soil Description Soil description includes an ASC or Northcote/other soil classification and usually includes colour, soil depth and other notes describing the soil.
14. VEG_DESC	Alias: 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.

Supplementary Information

Land resource survey index metadata record: www.ntlis.nt.gov.au/metadata/export_data?type=html&metadata_id=2DBCB771214306B6E040CD9B0F274EFE.

SALI Soil profile description metadata record: http://www.ntlis.nt.gov.au/metadata/export_data?type=html&metadata_id=2DBCB771214A06B6E040CD9B0F274EFE

Download the Technical Report describing Land Unit Core Attributes (PDF) via the NT Library http://hdl.handle.net/10070/254109

This record maintained using the NTLIS Metadata Tool

Metadata : Land unit compilations at various scales