I'm not sure, do the slope tool in Spatial Analyst generate maximum slope raster comparing elevation with it neighbors?
If yes I need the exact opposite..
Is there any way to generate minimum slope raster?
I am having trouble with derivation of these:
[dz/dx] = ((c + 2f + i) - (a + 2d + g) / (8 * x_cellsize)
[dz/dy] = ((g + 2h + i) - (a + 2b + c)) / (8 * y_cellsize)
the actual maximum slope is the maximum drop which is just dz/dx with respect to its 8 neighbours... it isn't directly implemented in Arc* ... you could derive your own. A statement of what you are trying to do might help with surrogate measures
Thank you. I'll give it a try
The Help says:
"Slope is the rate of maximum change in z-value from each cell."
What I want is algorithm for the rate of minimum change in z value from each cell... Is it Possible??
The tool delivers a slope which is a tad more convoluted, not maximum and not minimum Slope—Help | ArcGIS for Desktop You can see the derivation here How Slope works—Help | ArcGIS for Desktop If you can describe how you want your slope to be derived with respect to its neighbors then you can use a filter/window to start the math, much like they do with convolution filters for imaging Convolution function—Help | ArcGIS for Desktop
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