Example script for multiple operations?

[marpet]

In python you don’t need the XML. here you can use the output of one operator as in input to the next operator.
You can start command line sub-processes to start the processing with gpt, or execute the graph directly as in the following snippet:

import snappy
from snappy import jpy, ProgressMonitor

FileReader = jpy.get_type('java.io.FileReader')
GraphIO = jpy.get_type('org.esa.snap.core.gpf.graph.GraphIO')
Graph = jpy.get_type('org.esa.snap.core.gpf.graph.Graph')
GraphProcessor = jpy.get_type('org.esa.snap.core.gpf.graph.GraphProcessor')

graphFile = FileReader('Path-to-graph-file.xml')
graph = GraphIO.read(graphFile)
GraphProcessor.executeGraph(graph, ProgressMonitor.NULL)

I haven’t tested this code snippet. it is a translation from the java code. But I guess it will work.

If you want to get more progress output you can have a look at this thread, on how to do it:

Mimic progress monitoring in Snappy

Hi again! I’m wondering if anyone has any implementations of monitoring progress of processors within snappy? My usual goto back when I used to do this was watch Java VisualVM and you could tell which processor was working. Is there a nice way I can get an output from my python code to monitor this? I’d like to be able to get a % of progress through, almost mimicking SNAPs progress bar. Many thanks!