@norman-oklahoma ?ÿ Thanks Norman Up till now I always leave my backsight and foresight tripod up after shooting the control. I regularly check int...

@norman-oklahoma Norman thanks for your reply. I'd be grateful if you could expand on what errors it guards against, errors in setting up control, or...

Thanks BushAxe Describing the total or overall diameter makes sense, but I see lots of multi-trunk trees that are just not round, they're much more l...

my old tutor at college drummed it into me to check a tripod prism is centred before taking it down and also the check the target height before taking...

@firestix I remember on a survey once I measured some roof ridge heights for a topographical survey. I nearly had a heart attack when I saw in the su...

I think Party-chef has it. ?ÿ I borrowed a 17.5mm Leica offset peanut prism from a friend today. Leica does 2 peanut prisms, a Leica 0 offset and th...

@party-chef Thanks Party i am using ATR. It work great with the large Leica rounds with 0 (-34.4) offset. Why shouldn't it work so well?ÿ with smalle...

I am using the correct offset, I've verified the target height too. Grazing rays might be the problem. Next time I'm traversing I'll stick the peanut...

Both the prisms I use have Leica offsets of 0 which in the rest of the world is -34.4mm

thanks guys The offset I have in is fine. I use Leica big round prisms for traversing. I bought the peanut prism with the same offset to save switchi...

Great advise guys - thanks for posting. Love the 360 prisms, love the angle only top. ?ÿ

Thanks again guys. It's the same as any construction job, check original control, review and proceed. Its a shame most of the original control has alr...

Good question - one I asked them. The setting out work so far has been done by the contractor. They need a 3rd party to verify the dimensions of the b...

I'd really like to check their control but they may not want to pay me to do it so.... If the contractor doesn't want me to check their control I can...