S2 subset band selection and memory needs

[marpet]

Hi, my recent reply also applies to your first question. Please have look.

Snappy GPT operators

Hi Mark All operators from the command line are also available via snappy. But you should not instantiate the operator classes directly as long as there is no very good reason for it. (However I wonder why it didn’t work.) It is much better to invoke the operators via GPF. I just posted this one: Also helpful might be the links in: Currently you have to call snappy.GPF.getDefaultInstance().getOperatorSpiRegistry().loadOperatorSpis() once at the beginning of you script. In the next…

Regarding you second question. There is no data written to the current directory. But when you read Sentinel-2 products the data is extracted from the Jpeg2000 files and written to the temporary folder for faster access.