TrainOGRLayersClassifier (DEPRECATED)¶

Train a SVM classifier based on labeled geometries and a list of features to consider.

Detailed description¶

This application trains a SVM classifier based on labeled geometries and a list of features to consider for classification. This application is deprecated, prefer using TrainVectorClassifier which offers access to all the classifiers.

Parameters¶

This section describes in details the parameters available for this application. Table [1] presents a summary of these parameters and the parameters keys to be used in command-line and programming languages. Application key is TrainOGRLayersClassifier .

[1]	Table: Parameters table for TrainOGRLayersClassifier (DEPRECATED).

Parameter Key	Parameter Type	Parameter Description
inshp	Input vector data	Input vector data
instats	Input File name	Input File name
outsvm	Output File name	Output File name
feat	List	List
cfield	String	String
inxml	XML input parameters file	XML input parameters file
outxml	XML output parameters file	XML output parameters file

Name of the input shapefile: Name of the input shapefile.
XML file containing mean and variance of each feature.: XML file containing mean and variance of each feature.
Output model filename.: Output model filename.
List of features to consider for classification.: List of features to consider for classification.
Field containing the class id for supervision: Field containing the class id for supervision. Only geometries with this field available will be taken into account.
Load otb application from xml file: Load otb application from xml file.
Save otb application to xml file: Save otb application to xml file.

Example¶

To run this example in command-line, use the following:

otbcli_TrainOGRLayersClassifier -inshp vectorData.shp -instats meanVar.xml -outsvm svmModel.svm -feat perimeter -cfield predicted

To run this example from Python, use the following code snippet:

#!/usr/bin/python

# Import the otb applications package
import otbApplication

# The following line creates an instance of the TrainOGRLayersClassifier application
TrainOGRLayersClassifier = otbApplication.Registry.CreateApplication("TrainOGRLayersClassifier")

# The following lines set all the application parameters:
TrainOGRLayersClassifier.SetParameterString("inshp", "vectorData.shp")

TrainOGRLayersClassifier.SetParameterString("instats", "meanVar.xml")

TrainOGRLayersClassifier.SetParameterString("outsvm", "svmModel.svm")

# The following line execute the application
TrainOGRLayersClassifier.ExecuteAndWriteOutput()

Limitations¶

Experimental. For now only shapefiles are supported. Tuning of SVM classifier is not available.

Authors¶

This application has been written by David Youssefi during internship at CNES.