Tool Confusion Matrix (Two Grids)

The tool allows one to compare two classified grids. It creates a confusion matrix and derived coefficients as well as the combinations of both classifications as new grid. The values of both grids must match each other in order to do the comparison.
The tool provides three options to define the grid classes:
- by providing a look-up table for each grid
- by coloring each grid with a look-up table (colors type = classified) beforehand (only available in the GUI)
- by preparing the grid values appropriately; i.e., if no look-up table is provided, the tool simply extracts the classes from the grid values found in each grid
A typical application is a change detection analysis based on land cover classification of satellite imagery.

Author: O.Conrad (c) 2010
Menu: Imagery|Classification

Parameters

	Name	Type	Identifier	Description	Constraints
Input	Classification 1	Grid, input	`ONE`	-	-
	Look-up Table (*)	Table, input, optional	`ONE_LUT`	-	-
	Classification 2	Grid, input	`TWO`	-	-
	Look-up Table (*)	Table, input, optional	`TWO_LUT`	-	-
Output	Combined Classes	Grid, output	`COMBINED`	-	-
	Confusion Matrix	Table, output	`CONFUSION`	-	-
	Class Values	Table, output	`CLASSES`	-	-
	Summary	Table, output	`SUMMARY`	-	-
Options	Grid System	Grid system	`PARAMETERS_GRID_SYSTEM`	-	-
	Value	Table field	`ONE_LUT_MIN`	-	-
	Value (Maximum) (*)	Table field	`ONE_LUT_MAX`	-	-
	Name (*)	Table field	`ONE_LUT_NAM`	-	-
	Value	Table field	`TWO_LUT_MIN`	-	-
	Value (Maximum) (*)	Table field	`TWO_LUT_MAX`	-	-
	Name (*)	Table field	`TWO_LUT_NAM`	-	-
	Report Unchanged Classes	Boolean	`NOCHANGE`	-	Default: 1
	Include Unclassified Cells	Boolean	`NODATA`	-	Default: 1
	Output as...	Choice	`OUTPUT`	-	Available Choices: [0] cells [1] percent [2] area Default: 0
(*) optional

Command-line

Usage: saga_cmd imagery_classification 2 [-ONE <str>] [-ONE_LUT <str>] [-ONE_LUT_MIN <str>] [-ONE_LUT_MAX <str>] [-ONE_LUT_NAM <str>] [-TWO <str>] [-TWO_LUT <str>] [-TWO_LUT_MIN <str>] [-TWO_LUT_MAX <str>] [-TWO_LUT_NAM <str>] [-COMBINED <str>] [-NOCHANGE <str>] [-NODATA <str>] [-CONFUSION <str>] [-OUTPUT <str>] [-CLASSES <str>] [-SUMMARY <str>]
  -ONE:<str>        	Classification 1
	Grid, input
  -ONE_LUT:<str>    	Look-up Table
	Table, input, optional
  -ONE_LUT_MIN:<str>	Value
	Table field
  -ONE_LUT_MAX:<str>	Value (Maximum)
	Table field
  -ONE_LUT_NAM:<str>	Name
	Table field
  -TWO:<str>        	Classification 2
	Grid, input
  -TWO_LUT:<str>    	Look-up Table
	Table, input, optional
  -TWO_LUT_MIN:<str>	Value
	Table field
  -TWO_LUT_MAX:<str>	Value (Maximum)
	Table field
  -TWO_LUT_NAM:<str>	Name
	Table field
  -COMBINED:<str>   	Combined Classes
	Grid, output
  -NOCHANGE:<str>   	Report Unchanged Classes
	Boolean
	Default: 1
  -NODATA:<str>     	Include Unclassified Cells
	Boolean
	Default: 1
  -CONFUSION:<str>  	Confusion Matrix
	Table, output
  -OUTPUT:<str>     	Output as...
	Choice
	Available Choices:
	[0] cells
	[1] percent
	[2] area
	Default: 0
  -CLASSES:<str>    	Class Values
	Table, output
  -SUMMARY:<str>    	Summary
	Table, output