ComputeOGRLayersFeaturesStatistics - ComputeOGRLayersFeaturesStatistics¶

Compute statistics of the features in a set of OGR Layers

Detailed description¶

Compute statistics (mean and standard deviation) of the features in a set of OGR Layers, and write them in an XML file. This XML file can then be used by the training application.

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 ComputeOGRLayersFeaturesStatistics .

[1]	Table: Parameters table for ComputeOGRLayersFeaturesStatistics.

Parameter Key	Parameter Name	Parameter Type
inshp	Vector Data	Input vector data
outstats	Output XML file	Output File name
feat	Feature	List
inxml	Load otb application from xml file	XML input parameters file
outxml	Save otb application to xml file	XML output parameters file

Vector Data: Name of the input shapefile.
Output XML file: XML file containing mean and variance of each feature.
Feature: List of features to consider for statistics.
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_ComputeOGRLayersFeaturesStatistics -inshp vectorData.shp -outstats results.xml -feat perimeter

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 ComputeOGRLayersFeaturesStatistics application
ComputeOGRLayersFeaturesStatistics = otbApplication.Registry.CreateApplication("ComputeOGRLayersFeaturesStatistics")

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

ComputeOGRLayersFeaturesStatistics.SetParameterString("outstats", "results.xml")

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

Limitations¶

Experimental. For now only shapefiles are supported.

Authors¶

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