NSW Water Theme - Hydro Line

Please Note

WGS 84 = GDA94 service

This dataset has a spatial reference of [WGS 84 = GDA94] and can NOT be easily consumed into GDA2020 environments. A similar service with a ‘multiCRS’ suffix is available which can support GDA2020, GDA94 and WGS84 = GDA2020 environments. In due course, and allowing time for user feedback and testing, it is intended that these original services will adopt the new multiCRS functionally.

NSW Hydro Line defines the centreline of a water course. It includes features such as natural water course, canal-drain, race, spill way and tunnel-siphen. It includes key attributes such as hydro line name, perennially and flow direction.

Features within the Hydro Line class include:

Watercourse

Natural Watercourse - a naturally formed watercourse. This line feature dataset is part of the Topographic database.
Canal-Drain - an artificial (built) watercourse to convey water and/or to allow transportation upon. This line feature dataset is part of the Topographic database.

Watercourse Centre Line

Spillway - a constructed path or channel for excess water to pass over or beside a dam. This line feature dataset is part of the Topographic database.
Tunnel – Siphen - an underground watercourse conveying water that has direct association with the hydrographic network. Also included are siphens which is a man-made or natural conduit in the form of an inverted U shape and filled until gravitational force or atmospheric pressure is sufficient to force water in one end of the pipe and out the other end thus conducting water beneath a depressed place.

Connector

Connector - a line used maintain continuity of a watercourse where that watercourse is not physically evident. This line feature dataset is part of the digital Topographic database.

Water security is one of Australia’s major challenges. Key users of the hydrology data are NSW State and Local Government agencies as well as Federal Government agencies. These bodies use this data to better manage State and Local Government assets.

This hydrology data provides the NSW component of the Australian Hydrological Geospatial Fabric which is a critical input to the Australian Water Resources Information System.

More widespread use of the hydrology data is also found in emergency management response and recovery efforts, hazard mitigation or disaster risk reduction, climate change, natural resource assessment, environmental planning and monitoring, insurance, mining and agriculture.

Spatial Services continuously updates this theme with information sourced from relevant stakeholders and custodians; by data verification from other internal and external databases; research and through Spatial Services’ regular cycle of updating from aerial imagery and elevation data.

Metadata

Type	Esri Feature Service
Update Frequency	As required
Contact Details	Contact us via the Spatial Services Customer Hub
Relationship to Themes and Datasets	NSW Water Theme of the Foundation Spatial Data Framework (FSDF)
Accuracy	The dataset maintains a positional relationship to, and alignment with, the Lot and Property digital datasets. This dataset was captured by digitising the best available cadastral mapping at a variety of scales and accuracies, ranging from 1:500 to 1:250 000 according to the National Mapping Council of Australia, Standards of Map Accuracy (1975). Therefore, the position of the feature instance will be within 0.5mm at map scale for 90% of the well-defined points. That is, 1:500 = 0.25m, 1:2000 = 1m, 1:4000 = 2m, 1:25000 = 12.5m, 1:50000 = 25m and 1:100000 = 50m. A program of positional upgrade (accuracy improvement) is currently underway.
Spatial Reference System (dataset)	Geocentric Datum of Australia 1994 (GDA94), Australian Height Datum (AHD)
Spatial Reference System    (web service)	EPSG 4326: WGS84 Geographic 2D
WGS84 Equivalent To	GDA94
Spatial Extent	Full state
Standards and Specifications	Open Geospatial Consortium (OGC) implemented and compatible for consumption by common GIS platforms. Available as either cache or non-cache, depending on client use or requirement.
Distributors	Service Delivery, DCS Spatial Services 346 Panorama Ave Bathurst NSW 2795
Dataset Producers and Contributors	Environmental Spatial Programs, DCS Spatial Services 346 Panorama Ave Bathurst NSW 2795