I’m trying to do a supervised classification to see land cover change using the Semi-Automatic Plugin in QGIS. After I create my ROIs and try to assess the spectral signature plot for the ROIs, I receive this error: “Spectral signature does not match band set. Calculate spectral signatures again.” This shows up as a "Critical’ error.
My methodology so far:
- Downloaded my Sentinel-2 image and added only the bands with the same spatial resolution (e.g. B2, B3, B4, B8 for 10 m resolution) into the QGIS layers panel.
- Preprocessed the image and created a band set with those 10 m resolution bands and ticked the box to ‘Create a virtual raster of band set.’
- Selected a Training Input in SCP dock, created Macro Classes, and drew a polygon around my ROI.
- Highlighted one of the MC IDs I just drew, added it to the spectral signature plot, and went to asses the spectral signatures and receive the critical error message: “Spectral signature does not match band set. Calculate spectral signature again.”
I am at a loss on how to fix this. Please HELP!