I am going to calculate NDVI for one hectare study sites which are located in mountain areas. Therefore I have a doubt of the necessity of topographic correction before calculating NDVI. I am using Landsat 8 OLI level 2 products.
It is advisable to do a topographic correction if you need accurate NDVI values. You could use Minnaert or Cosine correction before calculating NDVI.
Yes, topographic correction is needed for Landsat 8 level 2 products in calculating NDVI for mountain areas. Topographic correction helps to account for the effects of terrain on the reflectance values captured by the satellite sensor, particularly in areas with varying slopes and elevations. This correction is important for accurately calculating NDVI in mountainous regions, as it helps to minimize the influence of topographic effects on the vegetation index values.
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