3.4.6.4. Cross classification (complete interface)

Cross classification

This tab allows for the calculation of a cross classification raster and matrix. It is loaded only if the Simplified interface is not enabled.

Classification is compared to a reference raster or reference vector (which is automatically converted to raster). This is useful for calculating the area for every combination between reference classes and classification values. If a vector is selected as reference, it is possible to choose a field describing class values.

The output is a cross raster that is a .tif file where pixel values represent the categories of comparison (i.e. combinations identified by the CrossMatrixCode) between the classification and reference. Also, a text file containing the cross matrix (i.e. a .csv file) is created with the same name defined for the .tif file.

This tool supports virtual raster output; if the output file name ends with .vrt then the output is created as virtual raster composed of as many .tif files as the number of CPU threads defined in System; for large rasters this can speed up the process.

Совет

Information about APIs of this tool in Remotior Sensus at this link .

3.4.6.4.1. Cross classification

Tool symbol and name	Description
Select the classification	select a classification raster (already loaded in QGIS)
	refresh layer list
Use value as NoData	if checked, set the value of NoData pixels, ignored during the calculation
Select the reference vector or raster	select a raster or a vector (already loaded in QGIS), used as reference layer
	refresh layer list
Vector field	if a vector is selected as reference, select a vector field containing numeric class values
Calculate linear regression	if checked, calculate linear regression between the two input layers
Script	add this function to the Script (complete interface)
RUN	run this function