31A88B1E3FECC1D5E040CD9B21447CECEnglishData Requests OfficerDepartment of Environment, Parks and Water SecurityGeospatial Services Branch (on behalf of department)datarequests.depws@nt.gov.au2013-05-13AS/NZS ISO 19115 Geographic Information - Metadata, ANZLIC Metadata Profile1.0Groundwater in the Daly Basin 2009, Northern Territory2007-03-302012-11-01This spatial dataset, surveyed at a scale of 1:250000, provides polygon information on the Groundwater map unit of the Daly Basin Aquifers, Northern Territory. The purpose of this survey was to map, describe and evaluate the water resources information for planning and management.
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Supplied by the Department of Environment and Natural Resources. Copyright Northern Territory Government.English-17.02-13.43130.881352007-05-302012-11-01datasetnot 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 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 original Groundwater, Surface Water and Water Development map unit boundaries were derived from geology maps, topographic maps, aerial photographs and stereoscope interpretation and satellite imagery interpretation. 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.
The core attributes information associated with the groundwater, surface water and water development dataset was derived from the original map's legend and annotations. File name Daly-Basin-Aquifers_500k-Map-m53.dgn.