Vegetation Survey of Groote Eylandt, 2018

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:2024-04-27

Date Metadata Last Updated:2021-12-09

Current URL (HTML format) : http://www.ntlis.nt.gov.au/metadata/export_data?type=html&metadata_id=D23540543791E50AE0532144CD9B7D89

Current URL (XML format) : http://www.ntlis.nt.gov.au/metadata/export_data?type=xml&metadata_id=D23540543791E50AE0532144CD9B7D89

Citation

ANZLIC Identifier:D23540543791E50AE0532144CD9B7D89

Title: Vegetation Survey of Groote Eylandt, 2018

Citation Date:2021-12-08

Date Type:publication

Custodian:Department of Environment, Parks and Water Security

Description

Abstract:

This spatial dataset provides polygon information delineating vegetation community boundaries at a scale of approximately 1:50 000 and covers Groote Eylandt and other islands in the Groote archipelago, including Bickerton and Winchelsea. The study area covers approximately 261 025 ha, excluding 718 089 ha mapped as ocean, and is within the Groote subregion of the Arnhem Coastal Bioregion. The majority of vegetation sites were surveyed in 2018.

The primary purpose of the project was to produce vegetation and habitat mapping for Groote Eylandt and other islands in the Groote archipelago, at an appropriate scale for the management of environmental assets within the Anindilyakwa Indigenous Protected Area. The dataset describes vegetation communities at four levels in accordance the NT National Vegetation Information System mapping (NRETAS, 2007), including Class, Structural Formation, Broad Structural Formation and Sub-Formation.

CAUTION: Polygon boundaries were derived using Sentinel-2 satellite image data (2018 annual composite, 10m spatial resolution). 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. Although field information has been incorporated into the development of this data, the final dataset has not been validated. Users are advised that attribute accuracy varies over the study area.

ANZLIC Search Words:

biota

environment

Spatial Domain:

Bounding Coordinates:

North Bounding Coordinate:-13.5003844989999

South Bounding Coordinate:-14.5009727939999

East Bounding Coordinate:137.00052282

West Bounding Coordinate:136.04936722

Dataset Status

Dataset ID:

Language:English

Character Set: Latin 1

Progress:completed

Maintenance and Update Frequency:notPlanned

Data Currency Start Date:2018-06-01

Data Currency End Date:2021-12-08

Access Constraint:Download the spatial data package (contains ESRI spatial data) via data.nt.gov.au/

You are licensed to use the 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:Vegetation community groups were derived from a statistical analysis of field data, based on structural, floristic characteristics and landscape position. Some groups were combined and broadened where remotely sensed data could not easily distinguish between them.

Vegetation communities were mapped using an object-based image analysis approach. A range of satellite image data and derived products and indices were used to delineate and classify vegetation community polygons, based primarily on Landsat (February 2016), Sentinel-2 (September 2016), Digital Elevation Model (May 2010) and Radiometric (2015) data. All data were processed to a consistent coordinate system (GDA94), pixel size (10 m) and footprint.

Image objects were generated using a multiresolution segmentation with a scale parameter of 10. Image objects were classified using a Random Trees model trained using field data, applying contextual rules (e.g. proximity to drainage lines), and undertaking some manual editing to increase classification accuracy. Classified image objects were converted to ESRI shapefile format (.shp) for further processing, including smoothing to eliminate pixelated polygon outlines. Spatial processing was undertaken using Trimble eCognition Developer 9.2 and ArcGIS 10.

Version 1: published 8th December 2021. Custodian - Flora and Fauna Division.
Spatial data formats are ESRI file geodatabase and shapefiles. Data is stored in datum GDA94, geographics.

Positional Accuracy:POLYGON DATA - Polygon boundaries were generated from rectified Sentinel-2 image data provided by QDES with a geometric accuracy of less than 12.5 m (ESA, 2015). This level of accuracy is generally considered high to very high.

Attribute Accuracy:Attribute values, as described in the Data Dictionary below, have been added to each polygon.

The department has assigned a list of core attribute values, described in the Data Dictionary below, to each polygon.
The attribute naming format uses 10 characters with no spaces to be suitable for an ESRI shape-file format. An alias attribute name is applied to an ESRI file geodatabase format (GDB).

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 of this spatial dataset is considered complete. If amendments are made to this dataset, a new version will be released. The associated technical report is in preparation.

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. SURVEYNAME Alias: Survey Name

02. SURVEY_ID Alias: Survey Identifiier

GROOT18_50. This is a department survey code used for spatial data management purposes. The code usually references the site details entered in the Vegetation Site Database (VSD).
The code is followed by _50. This is a reference to the spatial data scale that is suitable for the mapping.

03. VERSION Alias: Data version

Version 1 was published 8 December 2021. If further edits are required the version number will change and details will be noted in the Lineage section of this metadata record.

04. NVIS_DATA Alias: NVIS data
This dataset has not been included in the NVIS dataset.

05. NVISVEG_ID Alias: NVIS vegetation identifier

06. NTMU_ID Alias: NT Mapunit identifier

07. SOURCECODE Alias: Source veg mapunit

The source code is a unique identifier for the vegetation mapunit in this survey and is used for polygon labelling purposes. This attribute may also be referenced as VMU.

08. SPA_MIX Alias: Spatial Mix

This provides general information on both the spatial extent and makeup of the discrete sub-associations or floristic groups within the one map unit. Map units may be homogenous (pure) or mixed (mosaics). Spatially mixed map units are defined as those that have a number of discrete vegetation types within a map unit boundary. Mosaic The map unit definitely has two or three main sub-associations, which can be described in detail, the spatial extent of each within the polygon is known, and one of the sub-associations is clearly spatially dominant.

Pure The map unit has only one sub-association or discrete floristic group, and this can be adequately described.

09. COM_DESC Alias: Community Description

A general or common description for the veg mapunit.

10. L1_CLASS Alias: Level 1 - Class

Derived from the NVIS Information Hierarchy. The description of class includes the growth form from the ecologically dominant stratum of the vegetation type/community.

11. L2_STR_FOR Alias: Level 2 - Structural Formation

Derived from the NVIS Information Hierarchy. The description of structural formation should include dominant growth form, cover classes, height classes and height classifier with corresponding growth form for the ecologically dominant stratum of the vegetation type/community.

12. L3_BR_FOR Alias: Level 3 - Broad Floristic Formation

Derived from the NVIS Information Hierarchy.
The description of the vegetation type/community with floristic information at the level of genus, plus the structural formation of the dominant stratum reported at the sub-formation level (Level 4)
of the NVIS Information Hierarchy.

13. L4_SUB_FOR Alias: Level 4 - Sub-formation

Derived from the NVIS Information Hierarchy. For each stratum (Upper, Mid and Ground), the sub-formation description of the vegetation type should include floristic information (genus) plus the structural formation (dominant growth form, cover, height are implied).
A maximum of three strata is allowed and the dominant stratum is indicated by a plus symbol +.

14. L5_ASSOC Alias: Level 5 - Association

Not described in Version 1 of this dataset.
Derived from the NVIS Information Hierarchy. For each stratum, (Upper, Mid and Ground), the association description of the vegetation type/community should include floristic information for the dominant and/or diagnostic species (maximum of three species per stratum) plus the structural formation (dominant growth form, cover, height are implied). A maximum of three strata (U, M & G) are allowed and the dominant stratum is indicated by a plus symbol +.

15. ENV_DESC Alias: Environmental Description

This attribute comprises a description of the environmental parameters consistently occurring within the vegetation type and thereby helping to define it. This description will incorporate landform and in some situations soil information.

16. AREA_HA Alias: Area (ha)

Attribute	Attribute Description	Possible Code	Code Description
01. SURVEYNAME	Alias: Survey Name
02. SURVEY_ID	Alias: Survey Identifiier GROOT18_50. This is a department survey code used for spatial data management purposes. The code usually references the site details entered in the Vegetation Site Database (VSD). The code is followed by _50. This is a reference to the spatial data scale that is suitable for the mapping.
03. VERSION	Alias: Data version Version 1 was published 8 December 2021. If further edits are required the version number will change and details will be noted in the Lineage section of this metadata record.
04. NVIS_DATA	Alias: NVIS data This dataset has not been included in the NVIS dataset.
05. NVISVEG_ID	Alias: NVIS vegetation identifier
06. NTMU_ID	Alias: NT Mapunit identifier
07. SOURCECODE	Alias: Source veg mapunit The source code is a unique identifier for the vegetation mapunit in this survey and is used for polygon labelling purposes. This attribute may also be referenced as VMU.
08. SPA_MIX	Alias: Spatial Mix This provides general information on both the spatial extent and makeup of the discrete sub-associations or floristic groups within the one map unit. Map units may be homogenous (pure) or mixed (mosaics). Spatially mixed map units are defined as those that have a number of discrete vegetation types within a map unit boundary.	Mosaic	The map unit definitely has two or three main sub-associations, which can be described in detail, the spatial extent of each within the polygon is known, and one of the sub-associations is clearly spatially dominant.
		Pure	The map unit has only one sub-association or discrete floristic group, and this can be adequately described.
09. COM_DESC	Alias: Community Description A general or common description for the veg mapunit.
10. L1_CLASS	Alias: Level 1 - Class Derived from the NVIS Information Hierarchy. The description of class includes the growth form from the ecologically dominant stratum of the vegetation type/community.
11. L2_STR_FOR	Alias: Level 2 - Structural Formation Derived from the NVIS Information Hierarchy. The description of structural formation should include dominant growth form, cover classes, height classes and height classifier with corresponding growth form for the ecologically dominant stratum of the vegetation type/community.
12. L3_BR_FOR	Alias: Level 3 - Broad Floristic Formation Derived from the NVIS Information Hierarchy. The description of the vegetation type/community with floristic information at the level of genus, plus the structural formation of the dominant stratum reported at the sub-formation level (Level 4) of the NVIS Information Hierarchy.
13. L4_SUB_FOR	Alias: Level 4 - Sub-formation Derived from the NVIS Information Hierarchy. For each stratum (Upper, Mid and Ground), the sub-formation description of the vegetation type should include floristic information (genus) plus the structural formation (dominant growth form, cover, height are implied). A maximum of three strata is allowed and the dominant stratum is indicated by a plus symbol +.
14. L5_ASSOC	Alias: Level 5 - Association Not described in Version 1 of this dataset. Derived from the NVIS Information Hierarchy. For each stratum, (Upper, Mid and Ground), the association description of the vegetation type/community should include floristic information for the dominant and/or diagnostic species (maximum of three species per stratum) plus the structural formation (dominant growth form, cover, height are implied). A maximum of three strata (U, M & G) are allowed and the dominant stratum is indicated by a plus symbol +.
15. ENV_DESC	Alias: Environmental Description This attribute comprises a description of the environmental parameters consistently occurring within the vegetation type and thereby helping to define it. This description will incorporate landform and in some situations soil information.
16. AREA_HA	Alias: Area (ha)

Supplementary Information

Department survey Code (Vegetation survey) GROOT18_50

BIBLIOGRAPHIC REFERENCE:
-------------------------------------------
Cuff, N. (in prep)
Vegetation Survey of Groote Eyelandt, Northern Territory.
Department of Environment, Parks and Water Security, Darwin, Northern Territory.

ASSOCIATED INFORMATION:
-----------------------------------------
Sentinel-2 User Handbook. ESA Standard Document, 24/07/2015 Issue 1 Rev 2

ESCAVI (2003) Australian vegetation attribute manual: National Vegetation Information System, Version 6.0. Executive Steering Committee for Australian Vegetation Information. Department of the Environment and Heritage, Canberra.

Lewis, D., Brocklehurst, B. & Napier, D. (2007). Technical Specifications for Vegetation Map Unit Core Attributes. Technical Report No. 15/2007D. Department of Natural Resources Environment and the Arts, Palmerston, Northern Territory.
Download report: hdl.handle.net/10070/228504

National Vegetation Information System (NVIS)
www.environment.gov.au/land/publications/australian-vegetation-attribute-manual-version-7

Northern Territory Vegetation Site Database (VSD)
Metadata - www.ntlis.nt.gov.au/metadata/export_data?type=html&metadata_id=106CB8F612C2E339E050CD9B214430AB

This record maintained using the NTLIS Metadata Tool

Metadata : Vegetation Survey of Groote Eylandt, 2018