# Gradient Vector from Polar to Cartesian Coordinates

Victor Olaya & Volker Wichmann (c) 2004-2010
Converts gradient vector from polar coordinates (direction or aspect angle and length or tangens of slope) to directional components (Cartesian).
The module supports three conventions on how the angle of direction can be supplied:
(a) mathematical: direction angle is zero in East direction and the angle increases counterclockwise
(b) geographical: direction angle is zero in North direction and the angle increases clockwise
(c) zero direction and orientation are user defined

## Parameters

Grid system
Grid system
  Grid system
Direction
Input Grid
Length
Input Grid
X Component
Output Grid
Y Component
Output Grid
Polar Angle Units
Choice
  Available choices: radians, degree
Polar Coordinate System
Choice
  Available choices: mathematical, geographical, user defined
User defined Zero Direction
Floating point
  given in degree clockwise from North direction
  Maximum: 360.0
User defined Orientation
Choice
  Available choices: clockwise, counterclockwise