Subsetting a dedicated area

Is it possible to subset a SAR RGB combination image using an external shape file?
suppose I want to overlay a district boundary and want to calculate the total area under forest cover of that district?

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You can combine masks, one of the imported polygons, one for a land cover class.

You intersect both masks in the mask manager to get the pixels of interest. Then you calculate their area: Calculating water area

thank you so much

i am having this problem after importing the file. please help… i digitized it in QGIS

this means the coordinate system of the shapefile and the coordinate system of the raster do not match. Maybe one is geographic coordinates (WGS84, latitude/longitude) and one is UTM (metric x/y).

SNAP needs the shapefile to be in the same coodinate reference system as the raster it is imported into.