SAGA-GIS Tool Library Documentation (v6.1.0)

Tool 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-
OptionsGrid systemGrid systemPARAMETERS_GRID_SYSTEM--
Add 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 <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