I would like to know the area that each value in a raster has... The raster I have has values from 2-15 and I would like to know the area that each value is occupaying within my polygon... Thanks!

I vectorized and calculated the area using geometry columns but I find a problem when I add all of the calculated segments, they don't match the poligon's total area!

The fist picture is the resulting raster, I clipped my polygone out and then vectorized it (pic of de right)...

enter image description here

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    a sample of the erroneous result (print screen or something similar) would help a lot. Also are you performing your calculations in a valid CRS? WSG84 (epsg:4326) is not a very good choice because by definition the measurements are in degrees. – nickves Apr 9 '13 at 18:24
  • I am using UTM :) – Nadia Apr 9 '13 at 19:15
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    you said the error is in the area measurements. we'll need to see them. – underdark Apr 9 '13 at 20:13
  • Yes, well tha's been analyzed using excel but I will try a couple of solutions I saw in other question responses – Nadia Apr 9 '13 at 20:29
  • Can you post the differences in area? How did you get the total area in the raster btw? – R.K. Apr 10 '13 at 13:52

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