Survey with laser instruments

[Andy Waddington]

Sometime before sending, Wookey typed (and on Tuesday 2008-07-15 sent):

> The nominal accuracy of the laser tapes is better than analogue tapes.
> The nominal accuracy of the SAP is worse than compass/clino so in fact
> the optimal leg length should be shorter - probably around 3m in
> theory (handwave, no sums done). 

How does that relate to the surface surveys in Austria, Wooks ? The fixed
points were obtained by laser theodolite surveys with leg lengths of up to
several kilometres. Presumably this works because the angular accuracy of
these legs is very small (apart from the one obvious blunder we spotted:)
and this is not the sort of laser intrument that Graham is asking about ?

Andy