Divide a raster map by maeans of a polygon

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01-25-2011 08:45 PM
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Dear collegues,

I would like to know if it is possible to individualize a raster map by means of a polygon (feature). Like I show in the figure below, I have this raster map with diferent colours and I would like to separate according to the diferent polygons I have on it (black lines). My objective is to be able to work with each part of the raster individually. I have been thinking of vectorizing the raster map and then apply a "clip", "union" or intersect with the polygons but i would like to keep the raster format.

Best wishes,

Guillem
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