[AT] Satellite Tracking was Warning and apology.

[charlie hill]

Yep that's the deal Cecil.  We would lay out stuff for a pipeline or 
conveyor or huge steel duct work that was going to be built off site and 
sent to the site ready to assemble.  The footings and mounting bolts had to 
be on the money (usually within 1/4") over a distance of up to nearly a mile 
with several bends and changes of elevation along the way.  For those that 
have never tried it, it's a lot harder to accurately measure even 100" than 
you would ever imagine.  One day when we didn't have a lot to do our boss 
sent us out to set two hubs in the ground with a PK nail in each one.  One 
we marked and put witness flags around.  The other we placed several hundred 
feet away and burried the hub underground with no witness markers.  We 
didn't know why.  A few weeks later on a day we didn't have much to do he 
sent us out to find that burried hub.  It's not as easy as you would 
imagine.

Charlie
----- Original Message ----- 
From: "Cecil Bearden" <crbearden at copper.net>
To: "Antique tractor email discussion group" <at at lists.antique-tractor.com>
Sent: Sunday, April 06, 2008 8:50 AM
Subject: Re: [AT] Satellite Tracking was Warning and apology.


> With the new GPS surveying equipment we can get normal accuracy within a
> DIME !!!!  If we set on the location 1 minute or more we can get within
> 1/10 of an inch. It is close enough that we can import a set of plans
> for a compressor site into autocad and surveycad and set the location of
> the mounting bolts by the GPS unit and never use a tape measure...
> However, this old dog still spot checks with the tape measure.  When we
> put bolts into a 24 inch thick slab I hate to dig it up!!!
>
> Cecil in OKla
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