I am struggling with the pre-processing process for landsat8 imagery.
I want to use some indices (e.g. NDVI, SAVI, EVI, NDMI) and create a land cover map at the end using ENVI and ArcGIS.
As a first step, I could download Landsat8 OLI/TIRS C1 Level-1 data from the USGS website.
However, I am not sure whether this data is required to do radiometric/reflectance/atmospheric correction. The file name is
LC08_L1TP_StartDate_EndingDate_01_T1_Band# Data value is maximum 60,000, and the minimum value is all 0 except Band12 (Figure).
I read some website (https://landsat.usgs.gov/using-usgs-landsat-8-product) but still very unclear about what I really need to do.