Inversing is a basic process expected of applicants taking the FS and PS exams as well as some of the CST exams. We introduce the subject by discussing the source data used for inversing could be either latitudes and departures or Northing and Eastings of points in the dataset. We discussed that this is the shortcut term used by plane surveyors mostly to describe the process of using the source data to calculate the length of a line and its direction. We cover the fact that once a traverse or other dataset is adjusted, small variations in the coordinates cause shifts in each line’s length and direction. We end by solving a problem that requires inversing between two non-consecutive points in a traverse. An online “homework” problem is presented at the end, giving the learner the opportunity to pause the video to do the calculations and then to check their work. We also cover the concept of “normal” and how it is used in COGO. Running time 18 minutes.
You will learn…
- What the process of inversing is
- What source data is required to calculate inverses
- How to calculate the length and direction of the line
- What the term “normal” is in the context of coordinate geometry (COGO) and how it is used in typical surveying applications
