Land Types of the Southern Part of the 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:2024-05-08

Date Metadata Last Updated:2017-07-25

Current URL (HTML format) : http://www.ntlis.nt.gov.au/metadata/export_data?type=html&metadata_id=17A49F2A01AAEEF9E050CD9B21447516

Current URL (XML format) : http://www.ntlis.nt.gov.au/metadata/export_data?type=xml&metadata_id=17A49F2A01AAEEF9E050CD9B21447516

Citation

ANZLIC Identifier:17A49F2A01AAEEF9E050CD9B21447516

Title: Land Types of the Southern Part of the Northern Territory

Citation Date:2015-07-29

Date Type:creation

Custodian:Department of Environment, Parks and Water Security

Description

Abstract:

VERSION 3 - Published March 2017

This polygon spatial dataset provides information on land types over the southern part of the Northern Territory, giving land type boundaries and describes their dominant landform, soil and vegetation. This is a cumulative mapping project that is under development on a region by region basis. The current dataset, Version 3, containing the regions of Barkly Clay Plains, Davenport Ranges, Elliott Ranges, Tennant Creek Sandplains and South Sturt & Gulf Fall was published in March 2017.

This dataset supersedes the information published in July 2015 (Version 1. Barkly Clay Plains) and April 2016 (Version 2. Regions excluding South Sturt & Gulf Fall). This dataset is mapped at a nominal scale of 1:250,000.

In general, each land type is based on one or more components of one or more land systems mapped in the amalgamated dataset SOUTH_1M, (Land Systems of the Southern Part of the NT) which is in turn based on the original land systems mapped and described by CSIRO in the 1940s and 1950s. The description of landform, soil and vegetation for each land type is based on the information contained in the original CSIRO reports. In addition, where available, information also incorporated descriptions from finer scale land unit surveys if they occurred within the mapping boundaries and vegetation site information and/or road note information if it existed over the area.

The polygon boundaries are derived from remotely sensed imagery with pixel resolution of approximately 30m. The boundaries were created using an automated segmentation process that groups like-pixels into polygon segments. These segments were subsequently classified into land types.

CAUTION: Although field information has been collected, the final dataset has not been validated. Users are advised that attribute accuracy varies over the study area.

ANZLIC Search Words:

biota

environment

geoscientificInformation

imageryBaseMapsEarthCover

Spatial Domain:

Bounding Coordinates:

North Bounding Coordinate:-16

South Bounding Coordinate:-22.36

East Bounding Coordinate:138

West Bounding Coordinate:131.71

Dataset Status

Dataset ID:

Language:English

Character Set: Latin 1

Progress:completed

Maintenance and Update Frequency:asNeeded

Data Currency Start Date:2014-03-01

Data Currency End Date:2017-03-15

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:Map unit boundaries were derived from digital satellite imagery (Landsat-8 mosaic ~ August 2013, products derived from the Landsat archive, and ALOS radar data) and digital elevation model (SRTM-derived 1 second Smoothed DEM and derived products), all with a pixel resolution of approximately 30m. Analyses were performed in eCognition and ArcGIS.

Descriptions of land types were based on descriptions from original reports and refined using finer scale land unit descriptions where they overlap with the land type, and field observations where available. They were compiled according to national standards at the time of capture. Each land type is generally based on one or more components of one or more Land Systems as mapped and described in the dataset SOUTH_1M.

Map unit boundaries were derived using the above digital data using an automated segmentation approach. A segmentation was performed on a composite image including Landsat-8 imagery (August 2013), vegetation products developed through the QLD Department of Science, Information Technology, Innovation and NTDLRM Collaborative Research Agreement 2015 (seasonal fractional cover, persistent green, water mask); and DEM and derived products (slope, relief). The scale factor of the segmentation was chosen such that resulting segments visually appeared to capture landscape features at a scale of 1:250,000. Segments were classified into land types using a combination of 1) an automated random forest classification based on manually selected sample segments and 2) manual classification. Selection of sample segments and manual classification were informed by field observations and finer scale land-unit mapping where available, and largely by a visual analysis of satellite imagery (including Google Earth and layers of the composite image mentioned above), elevation products (including hillshade), geology mapping and other available biophysical spatial information.

Positional Accuracy:Map unit boundaries were derived from an automated segmentation process of raster data at a pixel resolution of approximately 30m. Positional accuracy is thus generally considered to be high. However positional accuracy is considerably lower where map unit boundaries are diffused (i.e. between land types that appear similar on imagery and have indistinct boundaries, for example between two land types that similar dominant vegetation species).

The data was created and edited using an Albers Conical Equal Area projection (central meridian 132.0; standard parallels -18.0 and -36.0). The final dataset is stored in the department's spatial library in geographics, datum GDA94.

Attribute Accuracy:Attributes were assigned according to the dominant features of the land type, as determined from previous mapping over the area, field observations (where available) and other spatial biophysical data. Attribute accuracy is considered to be highly variable across the study area, ranging from moderate-high in land types and regions where plentiful field data occur to very low in land types and regions where there are little or no ground data or finer-scale mapping.

CAUTION - Although field information has been collected, the final dataset has not been validated. Users are advised that attribute accuracy varies over the study area.

Attribute values, as described in the Data Dictionary below, have been joined to polygons based on their Land Type classification.

Logical Consistency:Polygons are naturally joined without overlap or gaps because they were derived from a single surface. GIS editing tools will be used to merge neighbouring regions. Polygons larger than 10ha are eliminated.

Completeness:Complete - Version 3.
The current dataset contains the regions of Barkly Clay Plains, Davenport Ranges, Elliott Ranges, Tennant Creek Sandplains and South Sturt & Gulf Fall. This is a cumulative mapping project that is being compiled on a region by region basis. It will be updated if and when an additional region is completed.

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

AREA_HA The area (hectares) has been calculated for each land type polygon using the Albers Conical Equal Area projection (central meridian 132.0; standard parallels -18.0 and -36.0).

LANDFORM Alias: Landform Class
The broad landform best representative of the land type. The categories are applicable to the NT and have been adapted from national criteria in the Australian Soil and Land Survey - Field Handbook (Mc Donald et.al. 1998)

LANDSCAPE Alias: Landscape Class
A grouping based on the underlying geology of the land type. These are consistent with the landscape classes in NT Land System datasets (NTLS_1M, SOUTH_1M, NORTH_250)

LAND_TYPE Alias: Land Type
The name of the land type, usually an abbreviation of the original land system and component on which this land type is based. Version 3 has replaced some of the land types with a shorter label. The land type used for Version 1 and 2 is stored in a summary spreadsheet (supplied with spatial data)

LS_DESC Alias: Landscape Class Description
A description of the Landscape Class. These are consistent with the landscape class descriptions in NT Land Systems datasets (NTLS_1M, SOUTH_1M, NORTH_250).

LT_NOTE Alias: Land Type Note
Additional information that defines this land type.

LT_REGION Alias: Land Type Region
The broad biogeographic region in which this land type is mapped.

SOIL Alias: Dominant Soil Order (ASC)
The dominant soil order in a land type. (Australian Soil Classification - Isbell 2002).

SPECIES_1 Alias: Veg Dom Species 1
The most dominant vegetation species in the dominant vegetation structure class.

SPECIES_2 Alias: Veg Dom Species 2
The 2nd most dominant vegetation species in the dominant vegetation structure class.

SPECIES_3 Alias: Veg Dom Species 3
The 3rd most dominant vegetation species in the dominant vegetation structure class.

SURVEY_ID Alias: Survey Identifier
A department code for the dataset. This survey is referenced as STHLT_250 for storage in the category Land Other.

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

VEG_DESC Alias: Dominant Veg Type Description
A general description of the dominant vegetation in this land type.

VEG_GROUP Alias: Broad Veg Group
This field is used for thematic map display purposes and is derived from further grouping of the Vegetation Structure attribute values.

VEG_STRUC Alias: Dominant Veg Structure (NVIS)
The dominant vegetation structural class from NVIS (ESCAVI 2003).

Attribute	Attribute Description	Possible Code	Code Description
AREA_HA	The area (hectares) has been calculated for each land type polygon using the Albers Conical Equal Area projection (central meridian 132.0; standard parallels -18.0 and -36.0).
LANDFORM	Alias: Landform Class The broad landform best representative of the land type. The categories are applicable to the NT and have been adapted from national criteria in the Australian Soil and Land Survey - Field Handbook (Mc Donald et.al. 1998)
LANDSCAPE	Alias: Landscape Class A grouping based on the underlying geology of the land type. These are consistent with the landscape classes in NT Land System datasets (NTLS_1M, SOUTH_1M, NORTH_250)
LAND_TYPE	Alias: Land Type The name of the land type, usually an abbreviation of the original land system and component on which this land type is based. Version 3 has replaced some of the land types with a shorter label. The land type used for Version 1 and 2 is stored in a summary spreadsheet (supplied with spatial data)
LS_DESC	Alias: Landscape Class Description A description of the Landscape Class. These are consistent with the landscape class descriptions in NT Land Systems datasets (NTLS_1M, SOUTH_1M, NORTH_250).
LT_NOTE	Alias: Land Type Note Additional information that defines this land type.
LT_REGION	Alias: Land Type Region The broad biogeographic region in which this land type is mapped.
SOIL	Alias: Dominant Soil Order (ASC) The dominant soil order in a land type. (Australian Soil Classification - Isbell 2002).
SPECIES_1	Alias: Veg Dom Species 1 The most dominant vegetation species in the dominant vegetation structure class.
SPECIES_2	Alias: Veg Dom Species 2 The 2nd most dominant vegetation species in the dominant vegetation structure class.
SPECIES_3	Alias: Veg Dom Species 3 The 3rd most dominant vegetation species in the dominant vegetation structure class.
SURVEY_ID	Alias: Survey Identifier A department code for the dataset. This survey is referenced as STHLT_250 for storage in the category Land Other.
SURVEY_NME	Alias: Survey Name The name of the survey area or report to which the mapping refers.
VEG_DESC	Alias: Dominant Veg Type Description A general description of the dominant vegetation in this land type.
VEG_GROUP	Alias: Broad Veg Group This field is used for thematic map display purposes and is derived from further grouping of the Vegetation Structure attribute values.
VEG_STRUC	Alias: Dominant Veg Structure (NVIS) The dominant vegetation structural class from NVIS (ESCAVI 2003).

Supplementary Information

Department Survey Code (Land Types): STHLT_250

Bibliographic Reference: Brocklehurst, P. and Trueman, M. (IN PREP)
Land Types of the Southern Part of the Northern Territory. Rangelands Division, Department of Environment and Natural Resources.

A series of 22 maps display the Southern Land Types spatial information at a scale of 1:250,000.
These are interactive PDF maps and best viewed on screen using Adobe Reader.
The overview MAP INDEX contains a web-link to each map (PDF) in this series and also provides details about how to view the interactive map products.
- Download the Map Index: www.ntlis.nt.gov.au/mpds/get_file?file_id=7322

This record maintained using the NTLIS Metadata Tool

Metadata : Land Types of the Southern Part of the Northern Territory