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calculating directional derivative and the gradient

Question asked by dsacco on Feb 20, 2015
Latest reply on Feb 22, 2015 by Dan_Patterson

Hi,

 

I'm looking to calculate the slope of a raster in a specific direction. For example: if i am standing at a point and facing NE (45 degrees), what is the slope I would be looking up.

 

The math is not to bad, there's a great illustration here: An introduction to the directional derivative and the gradient - Math Insight

 

What I don't know how to do is calculate derivatives in arcgis.

 

Any help would be greatly appreciated.

 

Thanks,

Dave

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