Tool Name	Fractal Brownian Noise
Tool ID	17
Library ID	grid_calculus
Version	1.0
Author(s)	A.Jack, O.Conrad (c) 2017

Please cite SAGA whenever you use it for your publications:

Description

This tool uses uniform random to create a grid that resembles fractal Brownian noise (FBN). The advantage of FBN noise is that it appears to have texture to the human eye, that resembles the types of textures that are observed in nature; terrains, algae growth, clouds, etc. The degree of texture observed in the FBN grid is dependent upon the sizes of the wavelengths chosen. The wavelengths should be chosen so they increase in size (a doubling of successive wavelengths is a good point to start). The greater the magnitude of the "ramp" of successive wavelengths the greater the texture in the FBN grid.

Parameters

Name	Type	Identifier	Description	Constraints
Input
Target System	grid, input, optional	TARGET_TEMPLATE	use this grid's system for output grids
Output
Fractal Brownian Noise	grid, output	OUT_GRID
Options
Scaling	choice	SCALING		Available Choices: [0] linear [1] geometric Default: 1
Maximum Scale	floating point number	MAX_SCALE		Minimum: 0.000000 Default: 1
Steps	integer number	STEPS		Minimum: 1 Default: 8
Noise Range	value range	RANGE		Default: -1; 1
Target Grid System	choice	TARGET_DEFINITION		Available Choices: [0] user defined [1] grid or grid system Default: 0
Cellsize	floating point number	TARGET_USER_SIZE		Minimum: 0.000000 Default: 1
West	floating point number	TARGET_USER_XMIN		Default: 0
East	floating point number	TARGET_USER_XMAX		Default: 100
South	floating point number	TARGET_USER_YMIN		Default: 0
North	floating point number	TARGET_USER_YMAX		Default: 100
Columns	integer number	TARGET_USER_COLS	Number of cells in East-West direction.	Minimum: 1 Default: 101
Rows	integer number	TARGET_USER_ROWS	Number of cells in North-South direction.	Minimum: 1 Default: 101
Rounding	boolean	TARGET_USER_FLAT	Round bounding coordinates to multiples of cell size. Ignored if cell size has decimal places.	Default: 1
Fit	choice	TARGET_USER_FITS		Available Choices: [0] nodes [1] cells Default: 0