Reclassify by Quantils, Slice (Equal Area)

KathrinSchulte-Braucks — Thu, 10 Mar 2011 15:26:59 GMT

I want to classify a raster into 5 classes so that each class has the same count of cells.

I tried Symbology/Classify/Quantils, Spatial Analyst -> Reclass-> Reclassify (Quantils) and as a third option Spatial Analyst-> Reclass-> Slice (Equal Areas). The result is always the same. The 5 classes have similar counts, but not equal counts. Each of the 3 methods leads to the same result (in numbers):

Example:
Original Range of values:
0-62

Break Values
1,3,6,11

Result of Reclassification:

VALUE    Count
1           3066521
2           2805701
3           2892320
4           2704418
5           2618351

Why aren't the counts equal?

Re: Reclassify by Quantils, Slice (Equal Area)

KathrinSchulte-Braucks — Thu, 10 Mar 2011 16:19:23 GMT

Uh yeah, I took this reason into consideration, but somehow did not think it to the end...

Your nice example made everything clear to me!

Thank you very much. So I will have to live with slightly different counts. 😉

topic Reclassify by Quantils, Slice (Equal Area) in ArcGIS Spatial Analyst Questions

Reclassify by Quantils, Slice (Equal Area)

Re: Reclassify by Quantils, Slice (Equal Area)