Are Sentinel-2 data geometrically corrected or do they need to be georeferenced as an image to image?
What is the best software for processing?
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With semi-automatic classification plugin in QGIS you can go all the process from downloading, to correcting, converting to TOA radiance and using them for classification– Elio DiazCommented Oct 10, 2017 at 14:48
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1 Answer
That depends what processing level you are referring to. Most data is delivered as Level-1C. According to the Sentinel-2 documentation:
Level-1C product provides orthorectified Top-Of-Atmosphere (TOA) reflectance, with sub-pixel multispectral registration. Cloud and land/water masks are included in the product.
Level-0, 1A and 1B are not directly disseminated to users but for completeness:
Level-0 is compressed raw data. The Level-0 product contains all the information required to generate the Level-1 (and upper) product levels.
Level-1A is uncompressed raw data with spectral bands coarsely coregistered and ancillary data appended.
Level-1B data is radiometrically corrected radiance data. The physical geometric model is refined using available ground control points and appended to the product, but not applied.
