Weighted Overlay Tool - Is this correct?

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08-20-2013 05:22 AM
KerryThomas
New Contributor II
I have used the weighted overlay tool to produce a suitability raster.

I have reclassified all of my datasets to a suitability scale of 1 - 5 (1 being least suitable, and 5 being most suitable). However, when I run the weighted overlay tool, my suitability image only shows values for 2 - 5. Is this because there just are no areas with suitability value of 1, or have I made a mistake somewhere? When I run another image through the model, I get values for 2 and 3, but not 1, 4 and 5.

I have input all of my reclassified rasters, given each a scale value of 1 - 5 (matching my suitability values) and used the evaluation scale of "1 to 5 by 1". Is this correct?

Thanks
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1 Reply
AmyKlug
Regular Contributor
When you run weighted overlay you are averaging out values based on weight. so 1 overlayed with a 4 can end up a 2.

EDIT: I would probably post this under Spatial Analyst forum!
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