>As a sidenote, Australia moves about 7cm north annually [1], so any encoding of GPS location is not flexible enough in the long term. In a hundred years, this

>As a sidenote, Australia moves about 7cm north annually [1], so any encoding of GPS location is not flexible enough in the long term. In a hundred years, this will be off by 7 meters. I highly doubt that makes a huge difference in addressing a physical building. >Also only encoding lat/long makes it so you would not be able to address a single floor in a large building. As is the case with regular physical addresses.