I will be using GRASS on OSX to classify Landsat 8 geotiff images to create a vegetation map for a study site that happens to fall over 2 separate Landsat scenes.
I seek advice about which route to take and I'm not able to find any other information about this elsewhere:
1.) Should I FIRST find a way to combine the 2 scenes together (which presumably would require combining the 2 scenes of each channel separately - would that be right?), and then cut out the small area covered by my study site and THEN start the classification process.
2.) Should I conduct image classification on the 2 adjacent Landsat scenes separately and then combine right at the end? (Although I'm worried this will take much longer, not to mention use up more memory - the study site I am working with is only 1400 km2)