I have been processing L1 to L2 for MODIS (250 m), OLCI, OLI, and MSI. I first extract the region of interest from L1 image then use l2gen to get L2 images. FInally I reproject the L2 images using gpt.
I was wondering if I can reproject L1 images first and the use l2gen to get L2 images. Is that better in any way?
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Note that there are "reproject" tools within OCSSW. This would involve taking the level-2 file and running it through l2bin and then through l3mapgen.