This document demonstrates a method for obtaining a geospatial polygon or other features from the NSW SEED (Sharing and Enabling Environmental Data) Map.
Go to the SEED Map
Click the Add layers from catalogue button in the left panel
Hint Multiple features can be selected by using the Identify by rectangle tool from the Tools button at the right.
Click the three vertical buttons menu on the popup and select Export to Shapefile. Save or move the downloaded zip file to your project directory.