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Thank you Dan! I appreciate the feedback and recommendation. I will convert them to integer then
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08-24-2017
06:58 PM
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so I've just read (How Weighted Sum works—Help | ArcGIS Desktop) The Weighted Sum tool does not rescale the reclassified values back to an evaluation scale. The Weighted Sum tool allows floating-point and integer values, whereas the Weighted Overlay tool only accepts integer rasters as inputs. Would it be incorrect, just to compare the data (apples with apples), to conver tthe weighted sum output data back to integer format using the "INT" tool? In otherwords normalise the data back to the evaluation scale of 1, 2, 3, 4 and 5?
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08-24-2017
06:56 PM
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I have various suitability layers (raster) with cells classified into 1, 2, 3, 4, 5 with 5 being the most suitable. When I combine my layers and I use Spatial analyst Raster Calculator in ArcGIS (10.3), with weighting multiplied as in layer1*0.2 + layer2*0.2 + layer3*0.2 +layer4*0.2 + layer5*0.2, the output is not what I expect: it creates values between 1.2 and 4.4 (floating points values). However, using the exact same layers and same weight schemes with weighted overlay, it keeps the 1, 2, 3, 4, 5 scheme. Can anyone explain why this is happening? I've watched tutorials where only 2 classes were used, say 50 and 100 with 100 being most suitable and using raster calculator, it keeps the 50 and 100 range. But why won't mine work? Much appreciate any feedback Werner#
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08-24-2017
06:39 PM
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