[SpamCop-List] Re: Great. Now it's my turn to get blocked.

[Marjolein Katsma]

R. P. McCormick (nobody at spamcop.net) wrote in news:bv1euq$4ij$1
@news.spamcop.net:

> 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.