Metadata : Land Units of Walhallow Station, Northern Territory.


Metadata Details:

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


Date Metadata Extracted:2023-12-12

Date Metadata Last Updated:2010-07-21

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ANZLIC Identifier:2DBCB771209E06B6E040CD9B0F274EFE

Title:Land Units of Walhallow Station, Northern Territory.

Citation Date:2000-01-14

Date Type:publication

Custodian:Department of Environment, Parks and Water Security



This dataset provides land resource information on the map unit boundaries of the Land Resources of Walhallow Station, Northern Territory. The purpose of this survey is to assist with the land management decision making on the property, specifically for pastoral use and soil management. This survey was mapped at a scale of 1:100,000.

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Spatial Domain:

Bounding Coordinates:

Dataset Status

Dataset ID:ANZNT0006001012


Character Set: Latin 1


Maintenance and Update Frequency:notPlanned

Data Currency Start Date:1992-09-16

Data Currency End Date:2010-07-21

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:

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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:Original map unit boundaries delineated from aerial photographs and stereoscope interpretation. Map units transferred to topographic map sheets via a mapograph. Original maps were hardcopy only. With the advent of geographic information systems polygons were digitised by rectifying the original hard copy maps.

Map unit boundaries derived using aerial photography and digital satellite imagery, 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 systems. Core landform, soil and vegetation attributes attached to map units with additional attributes unique to individual surveys.

Positional Accuracy:Map unit boundaries transferred from aerial photographs to topographic maps, using the best available topographic mapping at the time (generally 1:100 000) via a mapograph. 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 moderate to high.

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.

Logical Consistency:GIS editing tools were used to rectify all overshoots and undershoots in linework. Using ArcInfo topological consistency checks were performed to detect flaws in the spatial data structure. The coverage was cleaned, to eliminate any duplicates arcs. The coverage was built for arcs and polygon topologies. A label errors routine was run to detect unlabelled polygons. A node errors routine was run to identify pseudo nodes and dangles. Checks were done to unsure that all classified polygons are closed, nodes are formed at intersections of lines and that each polygon has only one label.

Core attributes have been attached to polygons.


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

Data Dictionary

AttributeAttribute DescriptionPossible CodeCode Description
LAND_UNITThe LAND_UNIT field is the land unit label from the spatial dataset (ie.9a2).
LF_CLASSLandform 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).
LU_DESCThe LU_DESC is a general text field from the map legend. The amount of detail may vary between surveys.
SOILThe dominant soil order described in a land unit is recorded
SOIL_SYSThe SOIL_SYS field is the soil classification system used to describe the soil in the land unit description
SPECIES_ 3Where 3 dominant vegetation species described in a land unit.The order of species listed determines their dominance
SPECIES_1The dominant vegetation species described in a land unit. The order of species listed determines their dominance
SPECIES_2Where 2 dominant vegetation species were described in a land unit. The order of species listed determines their dominance
SURVEY_IDThe SURVEY_ID field is the first five characters from the corporate survey code
SURVEY_NMEThe SURVEY_NAME is the full name of the report to which the mapping refers.
VEG_STRUCStructural classes from NVIS (ESCAVI 2003), Walker and Hopkins (1998) and Specht (1970) classification schemes.
VEG_SYSThe National Vegetation Information System (NVIS) classification system.

Supplementary Information

Bibliographic Reference: Edgoose, C. & Kennedy, A. (1996)
DLPE Technical Memorandum TM 96/4

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