55E5DC8F4C1128DCE050CD9B214428D4EnglishData Requests OfficerDepartment of Lands, Planning and EnvironmentGeospatial Services Unit (on behalf of department)Datarequests.DLPE@nt.gov.au2026-08-17AS/NZS ISO 19115 Geographic Information - Metadata, ANZLIC Metadata Profile1.0 Howard Groundwater System, Northern Territory2016-04-01This spatial dataset, surveyed at a scale of 1:100, 000, provides polygon information on the groundwater level seasonal variation; zones of varying salinity; flow direction and base-flow electrical conductivity signature response in the Howard River. The purpose of this survey was to map, describe and evaluate the water resources 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-12.5-12131131.52012-05-012016-04-01datasetnot knownComplete0not 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 100 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. Several bore sites describing yield or chemistry information have been grouped to describe a particular hydrology. From the geology and hydrology information the hydrogeology units were delineated.0The groundwater level seasonal variation; zones of varying salinity; flow direction and base-flow electrical conductivity signature information were derived and largely based on the data and interpreted products from two key reports. The two reports are: Fell-Smith, S.A., and Sumner, J., 2011. Koolpinyah Dolostone Aquifer Characteristics Project. Department of Natural Resources, Environment, the Arts and Sport, Report 26/2011D. Tan, K.P., Clarke, J.D.A., Halas, L., Lawrie, K.C., Apps, H.E., Brodie, R.C., Costello, M., Sumner, J., Fell-Smith, S., Christensen, N.B., Schoning, G.L., Halas, V. & Lewis, S.J., 2012. Northern Territory Coastal Plain: Mapping Seawater Intrusion in Coastal Plain Aquifers Using Airborne Electromagnetic Data. Geoscience Australia Record, 2012/41, Canberra. 218p. There are three data layers in the Howard Groundwater System map data: 1. groundwater levels (November 2013) 2. the groundwater level seasonal variation 3. water quality electrical conductivity range The hydrogeological unit boundaries polygon modifications/edits and geoprocessing were performed using ESRI ArcGIS 10 software. Core water resources attributes attached to map units boundary with additional attributes unique to individual surveys. The ESRI Geodatabase, MapInfo Table and Google Earth KML created using FME Workbench. The published map is derived from the ESRI Shape using MicroStation Bentley MicroStation Design (V8) software. The core attributes information associated with the groundwater dataset was derived from the original map's legend and annotations. File name Howard-Groundwater-System_100k-Map_m52.dgn. Additional attributes unique to individual surveys were also included.