[SpamCop-List] Re: Great. Now it's my turn to get blocked.
nobody at spamcop.net
Sun Jan 25 23:58:13 EST 2004
R. P. McCormick (nobody at spamcop.net) wrote in news:bv1euq$4ij$1
> That's why they typically put signals on pipe, wires, etc.
> and use a device like a metal detector to actually detect
> where buried things are - spraypainting the ground where found.
Signals? In 1886? Metal detectors? Won't work for pipes and cables that
aren't made of metal. We have a lot of stuff buried here for which an
*exact* location isn't known and a lot of stuff which isn't made of metal
either. Approximate location is usually known for old stuff, but can
easily be something like 30cm off - a "small" problem when you dig to
*find* it, but a bigger problem when you need to dig and *avoid* it.
(And, just wondering, even if we do have a cable or pipe made of metal -
just how accurately can that be located with a metal detector --and
without digging-- when it's 1.5 or 2 meters below ground?)
Marjolein Katsma - Amsterdam, NL - http://hshelp.com/
Spammers steal resources: they're my enemy.
Cyveillance steals resources: they're my enemy.
The enemy of my enemy can be my enemy, too.
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