Dataset Number 903 Dataset Title Topography - WaterCourses Custodian Data Authority: Department for Environment and Water Data Provider: Department for Environment and Water

Description Description The WaterCourses data set includes a broad selection of watercourses including drainage alignments not necessarily consisting of eroded beds or banks. Wide features are stored as polygons. Watercourses captured under larger scale mapping programs within restricted regions are stored in other layers. It is one of a collection of individual hydrographic data sets that are topologically structured and comprise point, line and polygon data types at a general capture scale of 1:50,000. It is used in a variety of applications, particularly in natural resource management, planning and development, and digital map publication. Usage Standard layer of topographic dataset. Can be used as a general indication of these features within the agricultural and pastoral areas of South Australia.

Data Quality Lineage Features were originally captured by analog photogrammetric techniques based on 1:80 000 scale aerial photography and surveyed ground control for the standard 1:50 000 mapping program. The photogrammetric plot detail was hand traced onto stable film for map production. The reproduction material was subsequently scanned, the data vectorised and processed through standard procedures to clean,and code the data. The tile based data was processed, edge-matched and converted to GIS format. Watercourse features captured through larger scale mapping programs have been stored in other layers. Subsequently, features have been maintained by heads-up-digitising techniques within geographic regions determined by project requirements. Since the year 2000, update changes generally have not been verified in the field. Through the Commonwealth (Bureau of Meteorology) funded Australian Hydrological Geospatial Fabric (Geofabric) project 2011-2012, respective versions of surface water datasets from the former DFW and former DENR were integrated to create a single authoratative database. Data in pastoral regions of the State has been sourced from the Bureau of Meteorology (BoM) Geofabric Surface Cartography V2.1 AHGFMappedStream dataset (equivalent to Geoscience Australia's GEODATA TOPO 250K). The Geofabric data was integrated in June 2013. Completeness Dataset is complete over its geographic extent. Agricultural and pastoral areas of South Australia (Whole of State). Positional Accuracy Features sourced from the BoM Geofabric are generally within +/- 100 metres of their true position. Of the remaining data, 90% of well defined features are within +/- 25metres of their true position.

Geographic Extent Extent Name South Australia Min Easting or Longitude 129 Min Northing or Latitude -38.25 Max Easting or Longitude 141 Max Northing or Latitude -26

Dataset Status Initially Acquired 01-JAN-1990 Last Updated CURRENT Update Frequency Quarterly Maintenance Method Updated on a regional basis by heads-up-digitising from orthophotography and integration of data from other sources. AusGOAL CC BY (Attribution)

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Contact Information Organisation Department for Environment and Water Information Postal Address GPO Box 1047 ADELAIDE SA 5001 Email DEWNR.Mapland@sa.gov.au