All of the needed information is on the sketch. This sketch shows
the break down to latitudes and departures. Notice that in this
example, the record courses and distances were run as in our problem
in irregular boundary adjustment. Set up a proportion as shown.
The latitude of the closing error is to the total length of all
the courses as the adjustment in latitude is to length of the course
being adjusted. So, our adjustment would be 0.94 chains, since the
latitude of the closing error is north. The adjustment to apply
to the first course is also north. Add the adjustment 0.94 to the
latitude of the first course, 31 is shown, and get 31.94, the adjusted
Now, set up a proportion for the adjustment of the departure.
The arrow points to the departure of the closing error. The adjustment
in departure is 2.585.