Interesting.?ÿ In Alaska the steam lines are run in below grade concrete utilidors.?ÿ Steam and condensate need to be able to expand and contract.?ÿ Nice in the winter, hell in the summer.?ÿ Glycol heat lines are direct bury.
I don't do this type of work but I am surprised that I don't see anything keeping the legs of the tripod from spreading apart.?ÿ Perhaps you did something that is not obvious in the photos.
Licensed Land Surveyor
Finger Lakes Region, Upstate New York
Your threads are always a treat.
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Any reason you ran the adjustment with Starnet instead of Geolab?
I was "forced" to start using Star*Net by my client because that is what they had and what they were used to reading the output of.?ÿ
I have found that I like the output of Star*Net better when dealing with a mixture of conventional and GNSS observations. However, Star*net will not mix conventional and leveling UNLESS you have a coordinate for every station present in the leveling data, whereas Geolab will.?ÿ
My workflow is to load all of the GPS vectors and conventional observations into databases, and I can export to either program. So it is seamless for me to use either one as far as the data reduction is concerned.?ÿ
I use Geolab for GNSS only projects, and especially for projects that cover a large area. We have multiple projects a year that cover 10,000 to 20,000 sq km or more, those will not adjust well if at all in Star*Net due to it performing the adjustments on a grid whereas Geolab performs adjustments in ECEF (I believe).?ÿ
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So there are pros and cons to each.?ÿ
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@john-hamilton check with Gavin Schrock about tunnel surveys: he sent me, years ago, how the supercollider tunnels got their controls measured. Cool details with the Invar ribbon measuring instruments and so forth.
