The classification mask is generated along with the process of generating the cloud mask quality indicator and by merging the information obtained from cirrus cloud detection and cloud shadow detection.

The classification map is produced for each SENTINEL-2 Level-1C product at 60 m resolution and byte values of the classification map are organised as shown in the table.

The information is used to mask the images according to valid pixel data used for this analysis, which are those corresponding to the classes 4, 5, 6, and 7