NSW Hydro Point defines point hydrographic feature types. It represents points of standard bodies of inland water where flow is minor and is defined as either natural water body or man-made water body. The dataset also indicates whether a hydro point is perennial, non-perennial or mainly dry.

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-siphon. It includes key attributes such as hydro line name, perennially and flow direction.

NSW Hydro Area is a polygon feature class defining hydrographic feature types. This feature class is divided into waterbody area and water course. Waterbody is a standard body of inland water of which flow is minor. Waterbody may be natural waterbody or man-made waterbody. Water course is a way or course through which water may pass. Hydro area feature class is also classified as perennial, non-perennial or mainly dry.

The Water theme is based on hydrology which is the study of the movement, distribution and quality of water. This includes the hydrologic cycles, water resources and environmental watershed sustainability. Hydrology includes surface hydrology, hydrogeology, drainage basin management and water quality where water plays the central role. Water (surface water and groundwater) is concerned with information as aligned with the definitions under the Water Act 2007. This theme includes Hydrology elements which are described as: Surface Water • Water in a watercourse, lake or wetland. • Any water flowing over or lying on land, either: • after having precipitated naturally after having risen to the surface naturally from underground. Groundwater • Water occurring at a place below ground that has been pumped, diverted or released to that place for the purpose of being stored there • Does not include water held in underground tanks, pipes or other works.

NSW Named Water Course defines the centreline of a named water course as a single feature. It is an aggregation of Hydro Line parts.

NSW Fuzzy Extent Water Line is a linear feature class representing the approximate extents of formally named water features that have relatively indistinct name extent. Fuzzy extent water lines features include Anabranch, Arm, Bend, Canal, Channel, Cowal, Passage, Reach, River Bend, River Feature, and Strait.

NSW Water Dashboards are an initiative by the NSW Department of Planning and Environment—Water to bring greater transparency to the water market participants in relation to information on the dealings in the water markets. i.e. Allocation Assignments, Change of Licence Holder, Permanent Share - General Security (GS), Permanent Share - High Security (HS).

NSW Coastline data is linear feature class defining the line of contact between a body of water and the land. In particular, the line delineating the interface between land, internal waters and the “Territorial Sea” as defined by the Seas and Submerged Lands Act - No. 161 of 1973. The coastline defining Mean High Water Mark (MHWM) does not include MHWM within estuaries. Features within coastline feature class include: mean high water mark and mean low water mark.

The National Hydrography Dataset (NHD) is a feature-based database that interconnects and uniquely identifies the stream segments or reaches that make up the nation's surface water drainage system. NHD data was originally developed at 1:100,000 scale and exists at that scale for the whole country. High resolution NHD adds detail to the original 1:100,000-scale NHD. (Data for Alaska, Puerto Rico and the Virgin Islands was developed at high-resolution, not 1:100,000 scale.) Like the 1:100,000-scale NHD, high resolution NHD contains reach codes for networked features and isolated lakes, flow direction, names, stream level, and centerline representations for areal water bodies. Reaches are also defined to represent waterbodies and the approximate shorelines of the Great Lakes, the Atlantic and Pacific Oceans and the Gulf of Mexico. The NHD also incorporates the National Spatial Data Infrastructure framework criteria set out by the Federal Geographic Data Committee.

The National Hydrography Dataset (NHD) is a feature-based database that interconnects and uniquely identifies the stream segments or reaches that make up the nation's surface water drainage system. NHD data was originally developed at 1:100,000 scale and exists at that scale for the whole country. High resolution NHD adds detail to the original 1:100,000-scale NHD. (Data for Alaska, Puerto Rico and the Virgin Islands was developed at high-resolution, not 1:100,000 scale.) Like the 1:100,000-scale NHD, high resolution NHD contains reach codes for networked features and isolated lakes, flow direction, names, stream level, and centerline representations for areal water bodies. Reaches are also defined to represent waterbodies and the approximate shorelines of the Great Lakes, the Atlantic and Pacific Oceans and the Gulf of Mexico. The NHD also incorporates the National Spatial Data Infrastructure framework criteria set out by the Federal Geographic Data Committee.