F071AAE3DB0664D1E040CD9B214452F2EnglishData Requests OfficerDepartment of Lands, Planning and EnvironmentGeospatial Services Unit (on behalf of department)Datarequests.DLPE@nt.gov.au2014-03-27AS/NZS ISO 19115 Geographic Information - Metadata, ANZLIC Metadata Profile1.0 Hydrogeological Map of the Northern Territory Great Artesian Basin 20132013-09-01This spatial dataset, surveyed at a scale of 1:1000000, provides polygon information on the Great Artesian Basin aquifer, referred to as the J aquifer, within the Northern Territory. The map depicts the elevation and thickness of the J aquifer, in addition to groundwater elevation, flow direction and the spatial extent of artesian conditions. The purpose of the survey was to map and describe water resource information for planning and management. 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-25.994-23.345134.278137.9952011-01-012013-09-01datasetnot knownComplete.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 knownPositional accuracy of 1000 metres from bore locations.0not knownAttributes assigned according to the dominant feature. For example, several similar geological units have been grouped to describe a particular geology. From the geology and hydrology information the hydrogeology units was delineated.0The aquifer extent, depth and thickness were derived from geology maps, topographic maps, processed seismic surveys, and point data from groundwater, mineral and petroleum exploration holes. Formation and groundwater depth data was converted to elevation using the SRTM 1 Second DEM-Sv1.0. The hydrology information was interpreted from standing water level measurements, flows from springs, chemical analysis of groundwater samples and surveys of outcrops of recharge beds. The map unit boundaries polygons were digitised by rectifying original hard copy base map use in the raster and hydrology interpretations using Bentley MicroStation Design (V7) software. FME Workbench script was then used to convert the unit boundary polygons from MicroStation Design to ESRI Shape with only the Level Names as an attribute. The core water attributes are then attached to this ESRI Shape, which was then use to convert to ESRI Geodatabase, MapInfo Table and Google Earth KML.