Tool Multi-Band Variation

Calculates for each cell the spectral variation based on feature space distances to the centroid for all cells in specified neighbourhood. The average distance has been used for Spectral Variation Hypothesis (SVH).

References

Palmer, M.W., Earls, P., Hoagland, B.W., White, P.S., Wohlgemuth, T. (2002): Quantitative tools for perfecting species lists.

Author: O.Conrad (c) 2010
Menu: Spatial and Geostatistics|Grids

Parameters

	Name	Type	Identifier	Description	Constraints
Input	Bands	Grid list (input)	`BANDS`	-	-
Output	Mean Distance	Grid (output)	`MEAN`	-	-
	Standard Deviation	Grid (output)	`STDDEV`	-	-
	Distance	Grid (output)	`DIFF`	-	-
Options	Grid system	Grid system	`PARAMETERS_GRID_SYSTEM`	-	-
	Radius [Cells]	Integer	`RADIUS`	-	Minimum: 1 Default: 1
	Weighting Function	Choice	`DW_WEIGHTING`	-	Available Choices: [0] no distance weighting [1] inverse distance to a power [2] exponential [3] gaussian weighting Default: 0
	Inverse Distance Weighting Power	Floating point	`DW_IDW_POWER`	-	Minimum: 0.000000 Default: 1.000000
	Inverse Distance Offset	Boolean	`DW_IDW_OFFSET`	Calculates weights for distance plus one, avoiding division by zero for zero distances	Default: 1
	Gaussian and Exponential Weighting Bandwidth	Floating point	`DW_BANDWIDTH`	-	Minimum: 0.000000 Default: 1.000000

Command-line

Usage: saga_cmd statistics_grid 9 [-BANDS <str>] [-MEAN <str>] [-STDDEV <str>] [-DIFF <str>] [-RADIUS <num>] [-DW_WEIGHTING <str>] [-DW_IDW_POWER <double>] [-DW_IDW_OFFSET <str>] [-DW_BANDWIDTH <double>]
  -BANDS:<str>          	Bands
	Grid list (input)
  -MEAN:<str>           	Mean Distance
	Grid (output)
  -STDDEV:<str>         	Standard Deviation
	Grid (output)
  -DIFF:<str>           	Distance
	Grid (output)
  -RADIUS:<num>         	Radius [Cells]
	Integer
	Minimum: 1
	Default: 1
  -DW_WEIGHTING:<str>   	Weighting Function
	Choice
	Available Choices:
	[0] no distance weighting
	[1] inverse distance to a power
	[2] exponential
	[3] gaussian weighting
	Default: 0
  -DW_IDW_POWER:<double>	Inverse Distance Weighting Power
	Floating point
	Minimum: 0.000000
	Default: 1.000000
  -DW_IDW_OFFSET:<str>  	Inverse Distance Offset
	Boolean
	Default: 1
  -DW_BANDWIDTH:<double>	Gaussian and Exponential Weighting Bandwidth
	Floating point
	Minimum: 0.000000
	Default: 1.000000