Pins as training data

Hi,
Can one select pixels as ROIs as is done in ENVI?

Or what is the best way of creating training areas within SNAP? as polygons or Pins?

Thanks

Pamela

digitizing polygons directly in SNAP is the easiest method. But if you have a shapefile with an attribute colum which determins your target class, you can import it as well.
Single points are probably not enough for training but I have never tested.

Ok thanks. What is the purpose of the Pins then? for generating spectrum curves?

The purpose to find the places in different products, for example, or as you said to see the spectra. Or to extract the values at these locations.

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Ok thanks a lot. Very helpful!