Fragmentation Classes from Density and Connectivity

Author: O.Conrad (c) 2008
Menu: Grid | Analysis | Fragmentation Analysis

Description

Fragmentation classes: (1) interior, if Density = 1.0 (2) undetermined, if Density > 0.6 and Density = Connectivity (3) perforated, if Density > 0.6 and Density - Connectivity > 0 (4) edge, if Density > 0.6 and Density - Connectivity < 0 (5) transitional, if 0.4 < Density < 0.6 (6) patch, if Density < 0.4

References

Riitters, K., Wickham, J., O'Neill, R., Jones, B., Smith, E. (2000): Global-scale patterns of forest fragmentation. Conservation Ecology 4(2):3. http://www.ecologyandsociety.org/vol4/iss2/art3/.

Parameters

	Name	Type	Identifier	Description	Constraints
Input	Density [Percent]	grid, input	`DENSITY`	Density Index (Pf).	-
Input	Connectivity [Percent]	grid, input	`CONNECTIVITY`	Connectivity Index (Pff).	-
Output	Fragmentation	grid, output	`FRAGMENTATION`	Fragmentation Index	-
Options	Grid System	grid system	`PARAMETERS_GRID_SYSTEM`	-	-
	Add Border	boolean	`BORDER`	-	Default: 0
	Connectivity Weighting	floating point number	`WEIGHT`	-	Minimum: 0.000000 Default: 1.100000
	Minimum Density [Percent]	floating point number	`DENSITY_MIN`	-	Minimum: 0.000000 Maximum: 100.000000 Default: 10.000000
	Minimum Density for Interior Forest [Percent]	floating point number	`DENSITY_INT`	if less than 100, it is distinguished between interior and core forest	Minimum: 0.000000 Maximum: 100.000000 Default: 99.000000

Command Line


Usage: saga_cmd grid_analysis 17 [-DENSITY ] [-CONNECTIVITY ] [-FRAGMENTATION ] [-BORDER ] [-WEIGHT ] [-DENSITY_MIN ] [-DENSITY_INT ]
  -DENSITY:       	Density [Percent]
	grid, input
  -CONNECTIVITY:  	Connectivity [Percent]
	grid, input
  -FRAGMENTATION: 	Fragmentation
	grid, output
  -BORDER:        	Add Border
	boolean
	Default: 0
  -WEIGHT:     	Connectivity Weighting
	floating point number
	Minimum: 0.000000
	Default: 1.100000
  -DENSITY_MIN:	Minimum Density [Percent]
	floating point number
	Minimum: 0.000000
	Maximum: 100.000000
	Default: 10.000000
  -DENSITY_INT:	Minimum Density for Interior Forest [Percent]
	floating point number
	Minimum: 0.000000
	Maximum: 100.000000
	Default: 99.000000