6. Geomatics Data and GIS

Data Quality — Quiz

Test your understanding of data quality with 5 practice questions.

Practice Questions

Question 1

In a land cover classification confusion matrix, there are 45 reference pixels of 'Forest', 50 mapped pixels of 'Forest', and 35 true positives. What is the producer’s accuracy for the 'Forest' class?

Question 2

Which metric quantifies systematic positional bias in spatial accuracy assessment?

Question 3

Which topology rule should be applied to ensure that line features have no unconnected endpoints in a linear network dataset?

Question 4

Given horizontal residuals of +1.5 m, −0.5 m, +0.5 m, and −1.5 m at control points, what is the standard deviation of these residuals (in meters)?

Question 5

What does 'fitness for use' refer to in the context of spatial data quality?