Land cover change in Scotland

Monitoring Land Cover Change  - Methodology

Accuracy Assessment

Air photo interpretation is subject to two types of error:

• 'error of omission' is where a feature is under-estimated by its incorrect interpretation as other features; and

• 'error of commission' is where a validated feature is over-estimated by the incorrect inclusion of other features.

The 1980s air photo interpretation was checked on the ground within a random sample of 150 NCMS sample squares.

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