Practice Accuracy Assessment (5.17.4) - Texture - Surveying and Geomatics

Practice: Accuracy assessment

Lesson 5.17.4Texture

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9 questions

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3 questions · about 2 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What is accuracy assessment?
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Think about why validating data is important.
Question 2.
Name one type of error that can occur during remote sensing classification.
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Consider the factors that could distort results.
3Question 3.
What does accuracy assessment measure?
- A) The cost of image classification
- B) The agreement between classified images and actual data
- C) The time taken for analysis
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Consider what it means to validate data.
4Question 4.
True or False: Producer's accuracy reflects the probability that a pixel classified on the map actually represents that category on the ground.
- True
- False
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Think about the meaning of 'producer' in this context.
Question 5.
Using a dataset of classified satellite images, design a systematic approach to select ground truth samples. Discuss which sampling technique would be most effective and justify your choice.
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Consider how the distribution can affect the overall assessment.
Question 6.
Given a confusion matrix, calculate the producer's and user's accuracy for each class, and analyze any discrepancies. What does this tell you about the classifications?
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Look closely at both types of accuracy to understand the strengths and weaknesses in your classifications.

5 more questions in this section. Enroll free to practise them all.