Tool Fragmentation Classes from Density and Connectivity

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/.

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

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	`WEIGHT`	-	Minimum: 0.000000 Default: 1.100000
	Minimum Density [Percent]	Floating point	`DENSITY_MIN`	-	Minimum: 0.000000 Maximum: 100.000000 Default: 10.000000
	Minimum Density for Interior Forest [Percent]	Floating point	`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 <str>] [-CONNECTIVITY <str>] [-FRAGMENTATION <str>] [-BORDER <str>] [-WEIGHT <double>] [-DENSITY_MIN <double>] [-DENSITY_INT <double>]
  -DENSITY:<str>       	Density [Percent]
	Grid (input)
  -CONNECTIVITY:<str>  	Connectivity [Percent]
	Grid (input)
  -FRAGMENTATION:<str> 	Fragmentation
	Grid (output)
  -BORDER:<str>        	Add Border
	Boolean
	Default: 0
  -WEIGHT:<double>     	Connectivity Weighting
	Floating point
	Minimum: 0.000000
	Default: 1.100000
  -DENSITY_MIN:<double>	Minimum Density [Percent]
	Floating point
	Minimum: 0.000000
	Maximum: 100.000000
	Default: 10.000000
  -DENSITY_INT:<double>	Minimum Density for Interior Forest [Percent]
	Floating point
	Minimum: 0.000000
	Maximum: 100.000000
	Default: 99.000000