2DBCB77120E506B6E040CD9B0F274EFEEnglishData Requests OfficerDepartment of Lands, Planning and EnvironmentGeospatial Services Unit (on behalf of department)Datarequests.DLPE@nt.gov.au2011-12-06AS/NZS ISO 19115 Geographic Information - Metadata, ANZLIC Metadata Profile1.0Lands of the Ord River Catchment, Northern Territory2000-01-142011-12-01ANZNT0782000058This spatial dataset describes the polygon information on the map unit boundaries of the Ord River Catchment (on the Northern Territory side). The land resource survey was conducted during 1974 at a scale of 1:100000 and covers an area of approximately 11,000km2. The purpose of this survey was was to map and describe the land resources in the catchment areas upstream of the Ord River irrigation scheme and to delineate those areas susceptible to erosion. Download the spatial data package (contains spatial data, maps and reports) via https://data.nt.gov.au/ 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: 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-17.910804-16.077798129.002249130.0639531974-01-011978-06-30datasetnot knownComplete0not knownGIS editing tools were used to rectify all overshoots and undershoots in line work, nodes are formed at the intersection of lines, polygon topology rules applied are; must not overlap, must not have gaps and 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 DATA Survey teams navigated during field operations with topographic maps, aerial photographs and prismatic compass. 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 via Geographic Information System software. 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. The attributes for each polygon in this spatial dataset are minimal. Further detail about each mapunit / land system is described in the associated report.0Original linework derived stereographically using aerial photography to delineate map unit (land system) boundaries and site selection, then extensively ground-truthed with topographic basemap coordinated field survey and site data collection. Verified linework transferred photogrammatically to 1:100,000 film/base to produce final map. Resultant linework scanned/digitised into GIS system as ArcInfo vector information then built as a polygon coverage. Map unit boundaries derived using hard copy aerial photography and stereoscope, geological and topographic maps. Field data (site data) described and classified according to national standards at the time of capture. Source data Aerial photography - 1:81,000 RC9-B&W Base map - Australian Topographic Survey Series 1:250,000 AGD66 - Lands/Survey Branch NT 1:100,000 film/base from 1:250,000 ATSS AGD66 - Australian Geological Survey Series 1:250,000 AGD66 - Northern Territory Cadastre AGD66 Recompiled and updated to GDA94 as part of ongoing GIS Program 2004; further refined in 2011.