Vicmap Hydro

## **Abstract** \n\nThis dataset and its metadata statement were supplied to the Bioregional Assessment Programme by a third party and are presented here as originally supplied.\n\n\n\nThis is a virtual dataset. It is too large to supply directly to this data register and is available via the Victorian government data repository - https://www.data.vic.gov.au/data/\n\n\n\nThis contains line features delineating hydrological features.\n\nIncludes; Watercourses (ie channels, rivers & streams) & Connectors.\n\nAttributed for name. Arcs run downstream.\n\nA brief description of this dataset is also contained within a readme.txt within the dataset\n\n## **Purpose** \n\nVicmap Hydro provides an accurate representation of natural and man made Hydrographic features across Victoria, at a capture scale of 1:25,000. It is used in a variety of applications, particularly in emergency services, natural resource management, planning and development, and digital map publication.\n\n## **Dataset History** \n\nDetail copied from the data.vic.gov.au Metadata record for Watercourse Network 1:25,000 - Vicmap Hydro (ANZVI0803002490).\n\n\n\nThe line work and points were generated from the Vicmap Digital Topographic (VDT) map base coordinated by LIG. VDT evolved from Victoria's printed 1:25,000 Topographic Map Series program together with the need to supply a control framework for the creation of the rural Digital Cadastral Mapbase. The capture scale is 1:25,000 Statewide and the coverage, except for minor border issues is also statewide.\n\n\n\nThe planimetric accuracy attainable will be the sum of errors from three sources:the positional accuracy of the source material, errors due to the conversion process, errors due to the manipulation process. For topographic base derived data this represents an error of 8.3m on the ground for 1:25,000 data. A conservative estimate of 10m for the standard deviation will be used in any data quality information. Alternate and equal ways of expressing this error are: not more than 10% of well-defined points will be in error by more than 16 m. The worst case error for the data is +/- 30 m. For vertical positional accuracy of points determined from contours there is an expectation that the elevation accuracy (standard deviation) will be half the value of the contour interval.\n\n## **Dataset Citation** \n\nVictorian Department of Environment, Land, Water and Planning (2016) Vicmap Hydro. Bioregional Assessment Source Dataset. Viewed 05 October 2018, http://data.bioregionalassessments.gov.au/dataset/158f64d6-26cf-458b-80f4-f27161be2c55.