Tool Name	Focal Statistics
Tool ID	1
Library ID	statistics_grid
Version	1.0
Author(s)	O.Conrad (c) 2003

Description

Based on its neighbourhood this tool calculates for each grid cell various statistical measures. According to Wilson & Gallant (2000) this tool was named 'Residual Analysis (Grid)' in earlier versions.

References

Wilson, J.P. & Gallant, J.C. [Eds.] (2000): Terrain analysis - principles and applications. New York, John Wiley & Sons, Inc.

Parameters

Name	Type	Identifier	Description	Constraints
Input
Grid	grid, input	GRID
Output
Mean Value	grid, output, optional	MEAN
Minimum Value	grid, output, optional	MIN
Maximum Value	grid, output, optional	MAX
Value Range	grid, output, optional	RANGE
Standard Deviation	grid, output, optional	STDDEV
Variance	grid, output, optional	VARIANCE
Sum	grid, output, optional	SUM
Difference from Mean Value	grid, output, optional	DIFF
Deviation from Mean Value	grid, output, optional	DEVMEAN
Percentile	grid, output, optional	PERCENT
Median	grid, output, optional	MEDIAN
Minority	grid, output, optional	MINORITY
Majority	grid, output, optional	MAJORITY
Options
Include Center Cell	boolean	BCENTER		Default: 1
Kernel Type	choice	KERNEL_TYPE	The kernel's shape.	Available Choices: [0] Square [1] Circle [2] Annulus [3] Sector Default: 1
Inner Radius	integer number	KERNEL_INNER	cells	Minimum: 0 Default: 0
Radius	integer number	KERNEL_RADIUS	cells	Minimum: 0 Default: 2
Direction	floating point number	KERNEL_DIRECTION	degree	Minimum: -360.000000 Maximum: 360.000000 Default: 0.000000
Tolerance	floating point number	KERNEL_TOLERANCE	degree	Minimum: 0.000000 Maximum: 180.000000 Default: 5.000000
Weighting Function	choice	DW_WEIGHTING		Available Choices: [0] no distance weighting [1] inverse distance to a power [2] exponential [3] gaussian Default: 0
Power	floating point number	DW_IDW_POWER		Minimum: 0.000000 Default: 2.000000
Bandwidth	floating point number	DW_BANDWIDTH	Bandwidth for exponential and Gaussian weighting	Minimum: 0.000000 Default: 1.000000