SAGA-GIS Module Library Documentation (v2.1.3)

Module Fragmentation Classes from Density and Connectivity


(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

 NameTypeIdentifierDescriptionConstraints
InputDensity [Percent]Grid (input)DENSITYDensity Index (Pf).-
Connectivity [Percent]Grid (input)CONNECTIVITYConnectivity Index (Pff).-
OutputFragmentationGrid (output)FRAGMENTATIONFragmentation Index-
OptionsAdd BorderBooleanBORDER-Default: 0
Connectivity WeightingFloating pointWEIGHT-Minimum: 0.000000
Default: 1.100000
Minimum Density [Percent]Floating pointDENSITY_MIN-Minimum: 0.000000
Maximum: 100.000000
Default: 10.000000
Minimum Density for Interior Forest [Percent]Floating pointDENSITY_INTif less than 100, it is distinguished between interior and core forestMinimum: 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 <str>] [-DENSITY_MIN <str>] [-DENSITY_INT <str>]
  -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:<str>       	Connectivity Weighting
	Floating point
	Minimum: 0.000000
	Default: 1.100000
  -DENSITY_MIN:<str>  	Minimum Density [Percent]
	Floating point
	Minimum: 0.000000
	Maximum: 100.000000
	Default: 10.000000
  -DENSITY_INT:<str>  	Minimum Density for Interior Forest [Percent]
	Floating point
	Minimum: 0.000000
	Maximum: 100.000000
	Default: 99.000000