[talk-au] Australia "changing coordinates"

Andrew Davidson theswavu at gmail.com
Tue Aug 2 05:37:50 UTC 2016

> WGS84 is a datum fixed; as in dated 1984 and the data does not change.

I'm not sure that you've understood exactly what a semi-dynamic datum 
is. Have a read of this:


particularly sections 3.4 and 3.5.

> Or you have access to survey points/marks and their data  in the local
> area.

LOL. Reminds me of this quote:

"You'll never find a survey mark on the ground with coordinates 
referenced to WGS-84. If you do, it's wrong."

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