16E0C03285D0E8CEE050CD9B21443D93EnglishData Requests OfficerDepartment of Lands, Planning and EnvironmentGeospatial Services Unit (on behalf of department)Datarequests.DLPE@nt.gov.au2022-06-06AS/NZS ISO 19115 Geographic Information - Metadata, ANZLIC Metadata Profile1.0Soil and Land Suitability Assessment for Irrigated Agriculture in the Larrimah Area, Sturt Plateau. 20162016-02-032021-12-22This spatial dataset provides polygon information delineating land unit boundaries at a scale of 1: 25 000 and describes the dominant landform, soils and vegetation of the Larrimah Area, Sturt Plateau, Northern Territory. The study area covers 427km2 and is located north-east of Larrimah. The primary purpose of the investigation was to map, describe and evaluate soil landscapes to inform future irrigation development in an area with identified potential for groundwater extraction. Core landform, soil and vegetation attributes attached to the land units are included with the spatial dataset. Field surveys were conducted over 12 months from July 2014 to June 2015. CAUTION: Map unit boundaries were derived using satellite imagery in association with a digital elevation model, geological and topographic data. Landform, soil and vegetation field assessments conform to national standards and support mapping at a scale of 1:25 000. 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. This map does not indicate, imply or ascertain the likelihood of groundwater availability or the granting of appropriate water extraction licensing needed to satisfy the irrigation requirements of the potential agricultural development options needed.Links to download reports, maps and spatial datasets are noted in the Development Opportunities website. https://depws.nt.gov.au/DevelopmentOpportunities Alternatively, download zipped spatial data packages (data, reports and maps) via the NTG Open Data Portal https://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: https://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.English-15.532169-15.268551133.14866133.4746972014-10-012022-06-06datasetnot knownVersion 2 published.0not knownGIS 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.0not knownPOLYGON DATA - 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 were 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. POINT DATA - Site point coordinates derived from a geographic positioning system with general accuracy of within 10 - 50 m.0not knownAttributes 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. Attribute values, as described in the Data Dictionary below, have been added to each polygon. GENERAL LAND CAPABILITY: Landscape assessment criteria were compiled for this project to determine a general land capability score. The scores are described using Class 1 to 4 (each is rated good to bad from 1 to 4). The criteria include: Flooding, Gilgai Microrelief, Salinity, Slope, Sodicity, Soil Depth, Soil Drainage, Surface Rock and Erosion Potential. The landscape assessment scores are derived from General Agricultural Land Capability Framework for the Northern Territory (in prep). LAND SUITABILITY CLASS: Each land unit has been attributed with a land suitability class to describe the potential for irrigated agricultural. Class 1 is described as suitable land with negligible limitations to Class 5 unsuitable land with extreme limitations. Potential crops have been grouped into 8 categories. (see Data Dictionary) For more information refer to Chapter 10 and Appendix 5 in the associated report.0Map 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. Map unit boundaries derived using digital satellite imagery, DEM, 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 (ArcGIS/MapInfo). Core landform, soil and vegetation attributes attached to map units with additional attributes unique to this survey. Version 2, Date: 6/06/2022. The survey was included in the Mapping the Future Larrimah project. The spatial data attributes were updated as follows: each land unit was assessed for GENERAL LAND CAPABILITY, evaluating landscape characteristics that could influence the general use of the land. The scores are described using Class 1 to 4 and derived from General Agricultural Land Capability Framework for the Northern Territory (in prep). These new attributes are now stored in spatial data. (see Data Dictionary) New map products were created for this survey.