Professional Courses
Industry-relevant training in Business, Technology, and Design to help professionals and graduates upskill for real-world careers.
Categories
Interactive Games
Fun, engaging games to boost memory, math fluency, typing speed, and English skills—perfect for learners of all ages.
Typing
Memory
Math
English Adventures
Knowledge
Enroll to start learning
You’ve not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.
Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What does the principal line connect?
💡 Hint: Think about what points are relevant in a photograph.
Question 2
Easy
Define the term 'Nadir Point'.
💡 Hint: Where does the camera look down towards?
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What does the principal line refer to in photogrammetry?
- A reference to ground signals
- A line connecting the principal point and the nadir point
- A guideline for capturing images
💡 Hint: Look for the two main points related to camera positioning.
Question 2
True or False: The nadir point is always the highest point in the photograph.
- True
- False
💡 Hint: Consider the position of the camera and what point it observes.
Solve and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Given the principal point coordinate and nadir point coordinate, explain how the principal line can be plotted and what implications it has on measurement accuracy.
💡 Hint: Consider Cartesian coordinates!
Question 2
Assume an aerial photograph has a principal line incorrectly determined due to tilt. Discuss the potential spatial analysis errors that could arise.
💡 Hint: What other areas might this distortion affect?
Challenge and get performance evaluation