The Surface Hydrology Lines (National) dataset presents the spatial locations of surface hydrology line features and its attributes. The dataset represents the Australia's surface hydrology at a national scale. It includes natural and man-made geographic features such as: watercourses, canals, pipelines, etc. This product presents line hydrology features with full topological connectivity and flow paths for the entire continental of Australia.

The Surface Hydrology Lines (National) dataset is a collaborative effort by Geoscience Australia and state governments. Geoscience Australia has conflated a 1:250,000 national digital surface hydrology dataset from and aggregated best available jurisdiction dataset. This dataset contains the hydrology line features only.