2DBCB771212D06B6E040CD9B0F274EFEEnglishData Requests OfficerDepartment of Lands, Planning and EnvironmentGeospatial Services Unit (on behalf of department)Datarequests.DLPE@nt.gov.au2026-05-05AS/NZS ISO 19115 Geographic Information - Metadata, ANZLIC Metadata Profile1.0Ecology of the Hardman Basin, Northern Territory2000-01-14ANZNT0903000031This polygon spatial dataset provides information delineating land unit boundaries at a scale of 1:50,000 for the Hardman Basin, Northern Territory. Core landform, soil and vegetation attributes attached to the land units are included in the spatial dataset, with additional attributes describing geology, erosion, landscape stability, and land management potential. The purpose of this survey was to map, describe and evaluate erosion type and severity for the Northern Territory portion of the Hardman Basin to guide land management practices and address erosion and sedimentation in the Ord River Catchment. Data was collected during the dry season of 1970. Some areas designated as severely eroded at time of survey have since been rehabilitated. Standard access notes Download the spatial data package (contains spatial data, maps and reports) via data.nt.gov.au/ You are licensed to use this publication 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 this publication. 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 Lands, Planning and Environment. Copyright Northern Territory Government. English-17.531279-17.013317129.001255129.3350561979-01-012006-06-28datasetnot knownIn progress0not knownGIS editing tools were used to rectify all overshoots and undershoots in linework. Using ArcInfo topographical 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.0not knownPOLYGON DATA Hardcopy maps rectified using control points marked on original hardcopy maps. 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. POINT SOURCE DATA Survey teams navigated during field operations with topographic maps, aerial photographs and prismatic compass's. Point source locations marked on aerial photography in the field. Positional accuracy considered within 300m but generally below 200m depending on the terrain. Site coordinates derived by transferring site locations from aerial photographs to topographic maps and coordinates calculated. In some cases sites have been georeferenced directly from aerial photography to Google Earth Web Map Server in MapInfo or ArcGIS.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. 0Original map unit boundaries delineated from aerial photographs and stereoscope interpretation. Map units transferred to clean dyeline sheets or topographic maps 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 hard copy aerial photography and stereoscope, satellite imagery (post 1993), geological and topographic maps. Field data (site data) described and classified according to national standards at the time of capture. Map unit polygons collected via geographic information system (ARC/MapInfo). Modernised core attributes attached in 2010, reupdated in 2026. Additional attributes (CSIRO Land System, Geology, Erosion, Stability, Potential) attached in 2026, remaining as described at time of original capture (1970).