SAGA-GIS Module Library Documentation (v2.2.2)

Module Fragmentation (Standard)

Grid based fragmentation analysis after Riitters et al. (2000).

(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
InputClassificationGrid (input)CLASSES--
OutputDensity [Percent]Grid (output)DENSITYDensity Index (Pf).-
Connectivity [Percent]Grid (output)CONNECTIVITYConnectivity Index (Pff).-
FragmentationGrid (output)FRAGMENTATIONFragmentation Index-
Summary (*)Table (optional output)FRAGSTATS--
OptionsClass IdentifierIntegerCLASS-Default: 1
NeighborhoodValue rangeNEIGHBORHOODMoving window size = 1 + 2 * Neighborhood.-
Level AggregationChoiceAGGREGATION-Available Choices:
[0] average
[1] multiplicative
Default: 0
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
Neighborhood TypeChoiceCIRCULAR-Available Choices:
[0] square
[1] circle
Default: 1
Include diagonal neighbour relationsBooleanDIAGONAL-Default: 1
(*) optional

Command-line

Usage: saga_cmd grid_analysis 15 [-CLASSES <str>] [-DENSITY <str>] [-CONNECTIVITY <str>] [-FRAGMENTATION <str>] [-FRAGSTATS <str>] [-CLASS <num>] [-NEIGHBORHOOD_MIN <str>] [-NEIGHBORHOOD_MAX <str>] [-AGGREGATION <str>] [-BORDER <str>] [-WEIGHT <str>] [-DENSITY_MIN <str>] [-DENSITY_INT <str>] [-CIRCULAR <str>] [-DIAGONAL <str>]
  -CLASSES:<str>         	Classification
	Grid (input)
  -DENSITY:<str>         	Density [Percent]
	Grid (output)
  -CONNECTIVITY:<str>    	Connectivity [Percent]
	Grid (output)
  -FRAGMENTATION:<str>   	Fragmentation
	Grid (output)
  -FRAGSTATS:<str>       	Summary
	Table (optional output)
  -CLASS:<num>           	Class Identifier
	Integer
	Default: 1
  -NEIGHBORHOOD_MIN:<str>	Neighborhood
	Value range
  -NEIGHBORHOOD_MAX:<str>	Neighborhood
	Value range
  -AGGREGATION:<str>     	Level Aggregation
	Choice
	Available Choices:
	[0] average
	[1] multiplicative
	Default: 0
  -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
  -CIRCULAR:<str>        	Neighborhood Type
	Choice
	Available Choices:
	[0] square
	[1] circle
	Default: 1
  -DIAGONAL:<str>        	Include diagonal neighbour relations
	Boolean
	Default: 1