Aspect process #557
Description
Proposed Process ID: aspect
Context
Allows users to compute the aspect of elevation maps
Description
Aspect is the direction component of a gradient vector. It is the direction in degrees of which direction the maximum change in direction is pointing at a given point. Horn's method is used to compute the aspect based on estimates of the partial derivatives dz/dx and dz/dy.
Aspect is computed in degrees from due north, i.e. as an azimuth in degrees (not radians).
The aspect process computes a new cube with computed aspect values for each band of the original cube.
Return Value
A cube with calculated aspects for each band, the band names are the original band names with a '_aspect' suffix.
Description
The aspect values are expressed in (positive) degrees from due north, i.e. as an azimuth in degrees (not radians).
In case the surface is flat, the value -1 is used (since there is no direction of the gradient).
Data Type
Float64