Command Line Description

Since the IdePix processor makes use of the SNAP graph processing framework, it can be used also as a command line tool. The graph processing is invoked by the command

${SNAP-INSTALL-DIR}/bin/gpt

To obtain general help on the graph processing, use the command

${SNAP-INSTALL-DIR}/bin/gpt -h

Specific help on the IdePix processor for a given instrument can be obtained with

${SNAP-INSTALL-DIR}/bin/gpt -h Snap.Idepix.<Instrument>

so we have here for MODIS:

${SNAP-INSTALL-DIR}/bin/gpt -h Idepix.Modis

(Note that MODIS is a special case for this notation as it is flown on the two platforms AQUA and TERRA.) In this case, information on the usage and a list of all available parameters are given. The IdePix processor parameters can also be specified via a graph xml file. E.g., a possible graph xml file for MODIS could look like the following. (Note that in principle it is not necessary to explicitly set parameters if default values shall be used).

    <graph id="IdepixModisTest">
        <version>1.0</version>
        <node id="idepix">
            <operator>Idepix.Modis</operator>
            <sources>
                <source>${sourceProduct}</source>
            </sources>
            <parameters>
                <cloudBufferWidth>3</cloudBufferWidth>
            </parameters>
        </node>
    </graph>

This graph can be invoked by the following call on the command line:

${SNAP-INSTALL-DIR}/bin/gpt <graph-file.xml> -SsourceProduct=<path-to-source-file>