1.21.2. Computation of coordinates

Try these first

1. 1.

   What is the definition of latitude?

   Hint

   Think about how we measure in a Cartesian system.

2. 2.

   How do you calculate the departure of a line?

   Hint

   Remember the formula involving sine.

3. 3.

   What is the first observation needed to compute traverse coordinates?

   • Length of the line
   • Real-world coordinates
   • Magnetic bearing

   Hint

   Think about what direction you need first.

4. 4.

   True or False: Latitude is the southward projection from the y-axis.

   • True
   • False

   Hint

   Recall the definitions we've just discussed.

5. 5.

   A closed traverse has an angular error of 3 degrees on a 6-sided traverse. Assuming each angle is to be adjusted equally, what will be the new angle for each interior angle if the original total was calculated incorrectly?

   Hint

   Remember the formula for the total angles.

6. 6.

   Given a traverse line with a length of 100 meters at a bearing of 60 degrees, calculate both latitude and departure, then adjust if needed considering an erroneous measurement of length was actually 105 meters.

   Hint

   Apply corrections based on the new lengths!