fixed points in survex

[John Halleck]

On Mon, 10 Feb 2003, Andrew Atkinson wrote:

> Date: Mon, 10 Feb 2003 18:42:10 +0000
> From: Andrew Atkinson <andya@freeuk.com>
> To: Lev Bishop <lev.bishop@yale.edu>, John Halleck <john.halleck@utah.edu>
> Cc: Erin M. Lynch <elynch@cds.caltech.edu>, survex@survex.com
> Subject: RE: fixed points in survex
> 
> 
> >
> > On Thu, 6 Feb 2003, John Halleck wrote:
> >
> > > I personally think that the "clean tape" sag correction on the other
> > > hand would be a lot closer to reality on a dirty tape than the
> > > totally uncorrected values being used now.
> >
> 
> Some of the more expensive tapes give the force that needs to be put on the
> tape to get the correct measurement, so all you need is a spring balance, or
> the like when surveying (still assumes a clean tape I assume)

  And still doesn't correct for sag.

> 
> Andrew
>