The Australian government’s GeoScience Australia website offers downloads of a wide variety of map and GIS data. There’s a web interface called MapConnect that you can try for selecting topographic and geology data for download and creating custom PDF maps:
But I found it a bit confusing to navigate and use. You might do better to go to some of the other pages that let you browse and/or search for data, even though finding data this way may take a while.
- Maps of Australia – Raster imagery (much of it not georeferenced) of geology, topography, bathymetry, satellite photos, etc. Similar but different link here.
- Place Name Search – Australian gazeteer.
- Data and Applications – List of category pages with GIS data and associated databases.
- Free Data Downloads – Search for national-scale GIS data by type or keywords.
Lots more to find, if you poke around the site for a while.
HT to m. bouchon.