Cosine of the aspect, computed using partial derivatives
Cosine of the slope, computed using partial derivatives
Partial derivative of z with respect to x
Partial derivative of z with respect to y
True if the partial derivatives at this point don't exist
Sine of the aspect, computed using partial derivatives
Sine of the slope, computed using partial derivatives
A representation of the approximated partial derivatives of a raster cell, and the slope and aspect that can be calculated from those values. Trigonometric values of aspect and slope, computed using the partial derivatives instead of library trigonometric functions, are also exposed for performance.