Metadata : Land Resources of the Marrakai Area, Northern Territory.


Metadata Details:

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

Version: 1.0

Date Metadata Extracted: 2017-03-28

Date Metadata Last Updated: 2016-06-29

Current URL (HTML format) :

Current URL (XML format) :


ANZLIC Identifier: 2DBCB771210206B6E040CD9B0F274EFE

Title: Land Resources of the Marrakai Area, Northern Territory.

Citation Date: 2000-01-14

Date Type: publication

Custodian: Department of Environment and Natural Resources



This spatial dataset, surveyed at a scale of 1:25000, provides polygon information on the map unit boundaries of the Marrakai Area, Northern Territory and includes a detailed description of the landform, soils and vegetation of each land unit. The survey area covers 580km2 to the east of the Adelaide River and south of the Arnhem Highway. The purpose of this survey was to map, describe and evaluate land to assist in future land use planning and management.

The polygon linework was redrawn in 2014 and an addtional land unit, 3b1, was created. This land unit is not described in the report. The soil description is similar to 3b however the dominant vegetation type is Dry Rainforest.

ANZLIC Search Words:

Spatial Domain:

Bounding Coordinates:

Dataset Status

Dataset ID: ANZNT0782000108

Language: English

Character Set: Latin 1

Progress: completed

Maintenance and Update Frequency: notPlanned

Data Currency Start Date: 1980-01-01

Data Currency End Date: 2014-09-10

Access Constraint: Please note data supplied by this Department is licensed under the Creative Commons license Attribution-Non-commercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0),

Data and all derivatives, must be attributed with this statement - Data supplied by Department of Environment and Natural Resources. ᄅ Copyright Northern Territory of Australia

Data Quality

Lineage: Map unit boundaries delineated from aerial photographs. Aerial photography scanned and rectified. Linework digitised on screen directly from original aerial photographs.

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 system (ARC/MapInfo). Core landform, soil and vegetation attributes attached to map units with additional attributes unique to individual surveys.

Positional Accuracy: POLYGON DATA
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.

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

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. Core attribute values, as described in the Data Dictionary below, were added to each map unit polygon in Sept 2014.

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: Complete


Name Organisation Position Role Phone Fax Email
SDM Information Officer Department of Environment and Natural Resources SDM Information Officer pointOfContact 08 9999 4577

Data Dictionary

Attribute Attribute Description Possible Code Code Description
LAND_UNIT Alias: Land Unit
The Land Unit label is used to describe each polygon (ie.1a2)
LF_CLASS Alias: Landform Class
The 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_DESC Alias: Landform Description
A Landform description includes details about landform, and usually general notes pertaining to slope, surface gravel and other details describing the land unit
SOIL Alias: Dominant Soil
The dominant soil order described in a land unit
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
SOIL_SYS Alias: Soil Classification System
The soil classification system used to describe the soil in the land unit description
SPECIES_1 Alias: Veg Species 1
The dominant vegetation species in the most common vegetation community described in a land unit.
SPECIES_2 Alias: Veg Species 2
The 2nd dominant vegetation species, (or co-dominant species) in the most common vegetation community described in a land unit.
SPECIES_3 Alias: Veg Species 3
The 3rd dominant vegetation species in the most common vegetation community described in a land unit.
SURVEY_ID Alias: Survey Identifier
The first five characters from the corporate survey code
SURVEY_NME Alias: Survey Name
The full name of the report to which the mapping refers
VEG_DESC Alias: Veg Description
The vegetation community is described with the dominant species and structure recorded.
VEG_STRUC Alias: Veg Structure
The vegetation structure for the most common vegetation communities described in a land unit
VEG_SYS Alias: Veg Classification System
The vegetation classification system used to describe the vegetation community in the land unit description

Supplementary Information

Department Survey Code identifier: MARRV_25

Fogarty, Peter (1980) THE LAND RESOURCES OF THE MARRAKAI AREA, Technical Report LC80/1, Land Conservation Unit, Conservation Commission of the Northern Territory, Darwin.
The technical report is available for download (PDF) via the Northern Territory Library,

Land Unit 3b1 references vegetation description from the paper;
Russell-Smith, J. 1991.
Classification, species richness, and environmental relations o