How to deal with LRUD data?

[Martin Sluka]

At 08:13 -0500 14.2.2005, Philip Balister wrote:
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>1) LRUD is a station attribute, not a shot attribute. So the LRUD data
>is unique to the station.

There is very common situation in 3D modeling of cave one needs two 
different LRUD sets on one station - typicaly if the point is just at 
beginning of small passage going from large room. Which LRUD is 
correct in such a case - the LRUD 0.5 0.0 0.6 0.0 or LRUD 8 15 22 1 
???

One may solve this by several "dirty" tricks - "zero shots", dividing 
of shots if 3D modeling, ... - bit this is not very correct from the 
of view point of theory of surveying.

So the LRUD should not be ONLY the station attribute, but the 
attribute of shot too - in that case you may use two sets of LRUD for 
one point, each one connected to different shot, or you may use LRUD 
not only in the points but in any place on shot (the laser disto is 
very helpfull in such situation).

Martin Sluka
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