Stumbled across this this the other day.
OzCoasts Climate Change
I know nothing about making maps beyond the brief reading of topics in this forum but thought that it might be of use.
From the front page
and from the actual portal pageMost organisations currently investing in coastal DEMs in Australia are capturing airborne LiDAR data with vertical accuracy of 10-15cm and horizontal grid spacing of 1-2m.
Hopefully it's of some use for mappersPlease use the 'Select' tool to clip out your area of interest otherwise you will get the whole dataset at cost of transfer. Orders under 400MB will be delivered at no charge via online download.
As at December 2011, non-government users can order the 1 second (DEM,DEM-S,DEM-H), 3 second (DSM,DEM,DEM-S), and 9 second (DSM,DEM,DEM-S) elevation data which are licensed under Creative Commons.