SAGA-GIS Tool Library Documentation (v9.1.2)

Tool ISODATA Clustering for Grids

This tool executes the Isodata unsupervised classification - clustering algorithm. Isodata stands for Iterative Self-Organizing Data Analysis Techniques. This is a more sophisticated algorithm which allows the number of clusters to be automatically adjusted during the iteration by merging similar clusters and splitting clusters with large standard deviations. The tool is based on Christos Iosifidis' Isodata implementation.


References


Parameters

 NameTypeIdentifierDescriptionConstraints
InputFeaturesGrid list, inputFEATURES--
OutputClustersGrid, outputCLUSTER--
StatisticsTable, outputSTATISTICS--
OptionsGrid SystemGrid systemPARAMETERS_GRID_SYSTEM--
NormalizeBooleanNORMALIZE-Default: 0
Maximum Number of IterationsIntegerITERATIONS-Minimum: 3
Default: 20
Initial Number of ClustersIntegerCLUSTER_INI-Minimum: 0
Default: 5
Maximum Number of ClustersIntegerCLUSTER_MAX-Minimum: 3
Default: 16
Minimum Number of Samples in a ClusterIntegerSAMPLES_MIN-Minimum: 2
Default: 5
Update Colors from FeaturesBoolean, GUIRGB_COLORSUse the first three features in list to obtain blue, green, red components for class colour in look-up table.Default: 0
Start PartitionChoiceINITIALIZE-Available Choices:
[0] random
[1] periodical
[2] keep values
Default: 0

Command-line

Usage: saga_cmd imagery_isocluster 0 [-FEATURES <str>] [-CLUSTER <str>] [-STATISTICS <str>] [-NORMALIZE <str>] [-ITERATIONS <num>] [-CLUSTER_INI <num>] [-CLUSTER_MAX <num>] [-SAMPLES_MIN <num>] [-INITIALIZE <str>]
  -FEATURES:<str>   	Features
	Grid list, input
  -CLUSTER:<str>    	Clusters
	Grid, output
  -STATISTICS:<str> 	Statistics
	Table, output
  -NORMALIZE:<str>  	Normalize
	Boolean
	Default: 0
  -ITERATIONS:<num> 	Maximum Number of Iterations
	Integer
	Minimum: 3
	Default: 20
  -CLUSTER_INI:<num>	Initial Number of Clusters
	Integer
	Minimum: 0
	Default: 5
  -CLUSTER_MAX:<num>	Maximum Number of Clusters
	Integer
	Minimum: 3
	Default: 16
  -SAMPLES_MIN:<num>	Minimum Number of Samples in a Cluster
	Integer
	Minimum: 2
	Default: 5
  -INITIALIZE:<str> 	Start Partition
	Choice
	Available Choices:
	[0] random
	[1] periodical
	[2] keep values
	Default: 0