@jimcox Ohh I use those two on a normal basis Jim. Geoscience Australia (GA) is working on a quasi geoid model which intruiged me a bit and wanted to ...

@jacob-wall your are spot on! it is for Australia. I ended up contacting our local providers if they can help me in this since we had an updated natio...

@rover83 yea true. It didn't have the datum I was after so I ended up contacting our local providers who had provided another geoid model 2 years ago....

@paul-in-pa oh wow that was so easy! thanks a lot paul! appreciate it mate!