Contingency/error matrix
Sampling results are presented in a contingency or error matrix with the following standard format:
- Reference data = columns
- Image classes = rows
Coral | Algae | Sand | Rock | Water | Row Total | |
---|---|---|---|---|---|---|
Coral | 70 | 5 | 0 | 13 | 0 | 88 |
Algae | 3 | 55 | 0 | 0 | 0 | 58 |
Sand | 0 | 0 | 99 | 0 | 0 | 99 |
Rock | 0 | 0 | 4 | 37 | 0 | 41 |
Water | 0 | 0 | 0 | 0 | 121 | 121 |
Col Total | 73 | 60 | 103 | 50 | 121 | 407 |
Calculations of error statistics are derived from contents of the error or contingency matrix at mapping category and map level.