Bravo, Tony Finch, for sharing this. I had no idea location was so complex!
Thank you.
Mac
On 13 Mar 2011, at 13:44, "J. Tallman"
<<mailto:[email protected]>[email protected]>
wrote:
I just saw on the news that the recent quake in Japan shifted the
earth's axis by 4 inches and that the main island of Japan moved
nearly 8 feet.
Could someone on the list put this into perspective? As an example,
I would imagine that the legal descriptions for property lines
based on precise lat/long coordinates now need to be revised - here
in SW Ohio the plats in the county offices are all described this
way.
The best description I have seen of how terrestrial location systems
work is this booklet published by the British Ordnance Survey. It
has a lot more detail about Britain than anywhere else but a lot of
the techniques and technologies are universal.
<http://dotat.at/:/PM89C>http://dotat.at/:/PM89C
Tony.
--
f.anthony.n.finch <[email protected]> http://dotat.at/
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