98360358A62C5973E0530101007FAEB9EnglishData Requests OfficerDepartment of Lands, Planning and EnvironmentGeospatial Services Unit (on behalf of department)Datarequests.DLPE@nt.gov.au2019-11-26AS/NZS ISO 19115 Geographic Information - Metadata, ANZLIC Metadata Profile1.0Darwin 1:250 000 hydrogeology2019-11-26 The Darwin 1: 250 000 hydrogeology map only product showing the region typical bore yields - success rate and groundwater salinity; aquifer types and geology. 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-14.8946249975-10.8534770015129.22318135.0000000162019-01-012019-11-26datasetnot knownComplete0not knownGIS editing tools were used to rectify all overshoots and undershoots in line work. Following polygon data topological rules, 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 knownPositional accuracy of 250 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 was delineated.0The groundwater and surface water information were derived from geology maps, topographic maps, aerial photographs and stereoscope interpretation and satellite imagery interpretation. The hydrology information from standing water level measurements flows from springs, chemical analyses of groundwater samples and surveys of outcrops of recharge beds