Loop Closures

[Wookey]

+++ Olly Betts [2014-11-11 20:02 +0000]:
> [Replying to the list too as I think this is of general interest]
> It's also easy to let the laser beam "flick off" the intended target
> and end up measuring to a different point to the target station

In my experience the device algorithms are pretty good at spotting
this and a laser flicking on and off a station will either give an
error or the nearest stable-ish point. So it is hard to get a 'far too
far' reading. If there is something in front then you can get a 'much
too short' reading.

> I don't know how accurate the compass and clino readings from a
> disto-x are expected to be.

It's a good question and we should probably do some proper
analysis. We have a fair amount of data from various training courses
and Austria and elsewhere.

My (very much 'gut') feeling is that you can reasonably expect 1% or
better with distoX (or SAP+disto), whereas you can expect 2% or better
with conventional instruments. Something of that ballpark anyway.

Wookey
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