Hydro line spatial data

Water Management (General) Regulation 2018 Hydro Line spatial data

What is Hydro Line spatial data?

The Water Management (General) Regulation 2018 hydro line spatial data is a dataset of mapped watercourses and waterbodies in NSW. It is based on the Spatial Services (Department of Finance, Services & Innovation) NSW Hydro Line dataset.

The Hydro Line spatial data is used to determine the Strahler stream order of a stream to identify:

How to access the Hydro Line spatial data

You can access the Water Management (General) Regulation 2018 Hydro Line spatial data in the department’s web mapping portal.

Important: Zoom thresholds have been applied to aid drawing/refresh rates of the dataset. In order to view the entire watercourse network you must do so at a scale of 2km or less, as indicated on the portal scale reference.

If you view the web mapping portal using a larger map scale, only a filtered view of major watercourses will be displayed. In this case, you may not be able to make an accurate determination of the Strahler stream order of a stream segment.

More information

For information about how to determine Strahler stream order, download the fact sheet: Determining Strahler stream order (PDF, 93.1 KB).