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Reclassify > Weighted Overlay

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04-14-2022 02:03 PM
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MarieJ
by
Emerging Contributor

I want to reclassify my raster layers to run a weighted overlay analysis.

I want to identify the most dangerous vs. least dangerous neighbourhoods in an area based on weighted crime indicators using a crime severity index. How would I reclassify each of these layers?

 

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BryndaHatch
Esri Contributor

I would set each of your crime indicators to a scale of 1 to 10.  You can use the Rescale by Function tool to do this.  I like the Power option, but you can use Linear, Logarithmic, Gaussian, Exponential or others.  

https://pro.arcgis.com/en/pro-app/latest/tool-reference/spatial-analyst/rescale-by-function.htm

https://pro.arcgis.com/en/pro-app/latest/tool-reference/spatial-analyst/how-rescale-by-function-work...

Then after you've set them all to that scale of 1-10, then use the Weighted Sum tool, setting your weights accordingly.  

https://pro.arcgis.com/en/pro-app/latest/tool-reference/spatial-analyst/weighted-sum.htm

https://pro.arcgis.com/en/pro-app/latest/tool-reference/spatial-analyst/how-weighted-sum-works.htm

 

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