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Disadvantages to running resection vs normal setup
Hi everyone. I am currently having a little bit of an argument with one of our more experienced field crew members. He’s been surveying for 15+ years and in my opinion has some bad habits that he refuses to unlearn. One of these is his firm belief that resections should and I quote “only be done when there are no other options” We are currently working a very very busy construction site with more equipment and machines blocking our line of site than I can describe. This just so happens to be our busiest part of the project, we are both crew chiefs however I am the lead in this project. He is very stubborn and more than likely upset that a 30 year old is trying to tell him how to do his job. I normally would not tell anyone how to do their job as long as they were not screwing anything up however his method of setting on the same two points repeatedly and setting points off this setup if something is in his line of site is starting to just get silly and I believe he is introducing more error into what he is laying out than needed. Behind the project is a large ridge that we have control on (traversed control.) For the past two months I set two backsites on whichever points will give me the best angle and then run my resection and lay out whatever it is I’m laying out. 90% of my layout work is foundations and anchor bolts. I do this for many reasons and will list them. I would just like anyone’s input on if any of my theories are flawed because I’m trying to really figure out why he’s so against them.
1. With resections you can set up right next to what you’re laying out
2. You are establishing control while at the same time setting up for your layout, saving time.
3. With you being so close to what you’re laying out the error decreases. When I stake out my backsite which is 900′ away after an hour and see an error of .04′ I know that that error is much less on what I’m laying out because of how close I am.
4. Easier to re-level the transit when it’s sitting 20′ away from you.
5. Resections help to average out error in setups.
6. We get a lot of different tasks throughout the day usually I lay out a foundation with 40 anchor bolts in about an hour and then get a call to do the same thing 150′ away from where I’m at. This allows me to pick up by transit, move to where I need to be, turn the glass on my backsites if need be and run a new resection.With all of these advantages I just don’t understand his thinking. I do (and not bragging here) but at least double the work he does throughout the day because of this method and it’s actually starting to make me mad because part of me thinks he’s doing it on purpose so he doesn’t have to work as much. Half his day is figuring out control dilemmas where I never have that problem. The way this site is setup is we have a fixed GPS base and are running a local coordinate system. The GPS is calibrated to our traverse so everything jives well. Whenever I stake out one of my control points of something I’ve laid out from a resection it always hits tight. I guess I’m just looking for others opinions on this issue and to hopefully gain a little insight on why he may be so against them.
Thanks
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