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Determining the area above a threshold level

Question asked by NDG565 on Nov 8, 2017
Latest reply on Nov 8, 2017 by Dan_Patterson

I am trying to create a map to identify land that is suitable for growing crops on. I have a raster which displays the yield potential for Europe, but is not divided into countries. I have also calculated the yield potential requirement that is needed to be achieved on the land in each individual country. I calculated this on an excel document but have also added it as a field on a vector layer with country polygons. 

Is there a way for me to determine which areas are above the threshold level as the level varies by country?

 

Sorry if this isn't worded well, I wasn't really sure the best way to explain it.

(I'm using version 10.4.1)

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