Aggregation replaces a large number of distinct objects with a smaller number of new objects.

Reference data identify 120 water pixels. A classification correctly identifies 96 and incorrectly labels 24 as non-water. What is the sensitivity as a percentage?

A classification labels 150 pixels as trees. Reference data confirm that 120 are trees and 30 are not trees. What is the precision as a percentage?

Select the correct percentage Error of Omission for Class B. [3] / Kies die korrekte persentasie fout van versuim/ weglating vir Klas B. [3]