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I have 900 1km buffers (polygons) in one layer and a raster layer for forest area (reclassified into forest 1, non forest 0). I have tried:

  1. Tabulate area - but realised this does not work for overlapping polygons
  2. Convert Raster to Polygon - Intersect and then calculate geometry for area but I'm getting areas equal to the pixel size of the raster (100mx100m= 10,000) and I'm not sure how to convert this back to m2...
Hornbydd
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rgardine
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  • If the native units are in metres then there is no conversion. If you want to process the output as Km2 then you divide the area by 1,000,000. – Hornbydd Mar 23 '21 at 10:06
  • You could also Dissolve your polygons, and then tabulate area. – ycartwhelen Mar 23 '21 at 12:32
  • https://gis.stackexchange.com/questions/371783/zonal-statistics-2-ends-up-causing-a-fatal-error-is-there-an-alternative/371790#371790 – FelixIP Mar 23 '21 at 18:26
  • Hi all, so my method of converting to polygon and intersecting seems ok? At this point overlapping polygons shouldnt matter?

    @ycartwhelen could you clarify am i dissolving my converted raster?

     – rgardine Mar 23 '21 at 20:58
  • Following up on @FelixIP's comment, Dissolve -> Zonal Statistics as Table would be more efficient than converting from raster to polygon and then using Tabulate. – ycartwhelen Mar 24 '21 at 12:11

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