First thing i do is READ the manual and understand the math behind what and how it does a resection or free station. Trimble Access actually has two different main mathmajical formulas that it uses depending on user choosing and number of pionts and if hz and vt is used. From that you can build the field procedures.?ÿ
A trick I use when I am limited to two points. Is once resection is done re do a station set up but bs the fs and do a check. I know this is old fashioned and was a field procedure some used when we computed them longhand. Kinda helped make sure you were not reversing a bearing or azimuth etc. ?ÿi like around 30 to 55 degrees geometry depends on what I am doing. And which method. Jim made some very good ?ÿpoints and it shows he has checked the math. I still see companies refusing to allow resections because of the past issues. ?ÿAnother field ck is once completed have them set a temp point randomly where it can see two of the main points or a third point of overall traverse. At some point the either occupy it and ck to something not used or occupy something not used and turn to that point.?ÿ
dont know what software but not all software uses the same math to get to the position. So that will dictate your field procedures. ?ÿGood luck. ?ÿ
A very interesting topic.
Resection is very useful in construction conditions because it saves time and reduces errors associated with positioning successive stations, and increases accuracy due to the absence of station errors.
Colleagues wrote very important and interesting things.
For my part, I would like to add that in the case of construction sites, it is hard to get the geometry of the setting due to the possibility of preserving the view.
There are problems with the geometry of the distance, some points are closer, some are further away, this affects the accuracy. In the case of high-rise buildings where the points from the laser plummet are close, it is worth adding an angle to another, one further point.
Many points do not mean better, the geometry is important. Having an angle and a distance makes it easier, but you can't help but have an idea of how math works. Three points spread out about 120 were taught in school, but in construction conditions it's hard to keep them, I'll count with ellipses what Jim Frame wrote about, because it's very practical.
A trick I use when I am limited to two points.
My trick is such situations is to set up on one, backsight the other, and spin in a new point.?ÿ The rule is 3 points used in resections. Period. No tricks.