LSIT Measurement Technology 2 — Questions and Answers
Question 1: What is a closure ratio?
- Ratio of misclosure to total distance; acceptable typically 1:10,000+ (Correct answer)
- Survey completion percent
- Cost-to-accuracy ratio
- Points per hour
Correct answer: Ratio of misclosure to total distance; acceptable typically 1:10,000+
This expresses accuracy relative to total distance.
Question 2: What is the method of least squares?
- Minimizing sum of squared residuals to find best-fit survey values (Correct answer)
- Measuring smallest areas
- Finding shortest distance
- Reducing measurements needed
Correct answer: Minimizing sum of squared residuals to find best-fit survey values
This optimally distributes errors across all measurements.
Question 3: What is the coordinate method for area?
- Using boundary point coordinates with cross-multiplication formula (Correct answer)
- Walking the perimeter
- Aerial photo estimation
- Grid square counting
Correct answer: Using boundary point coordinates with cross-multiplication formula
Mathematical formulas provide precise area from coordinates.
Question 4: What are control surveys?
- Establishing precisely located reference point networks for detailed surveys (Correct answer)
- Controlling site access
- Controlling budget
- Managing personnel
Correct answer: Establishing precisely located reference point networks for detailed surveys
These create the reference framework for other surveys.
Question 5: What is construction staking?
- Placing stakes on ground to guide construction per design plans (Correct answer)
- Removing old markers
- Measuring structures
- Recording corners
Correct answer: Placing stakes on ground to guide construction per design plans
Design plans are transferred to the actual ground.
Question 6: What is RTK GNSS surveying?
- Real-time kinematic positioning providing centimeter accuracy using base-rover system (Correct answer)
- A type of compass
- A mapping software
- An aerial survey method
Correct answer: Real-time kinematic positioning providing centimeter accuracy using base-rover system
This GNSS technique achieves very high accuracy in real time.
LSIT Measurement Technology 2
What is a closure ratio?