Aspects Regarding NDVI Index Calculated for Softwood and Mixed Stands

Abstract

Normalized Difference Vegetation Index represents an objective index of the stand’s state of vegetation and is related to the quantity of biomass, vegetation covered percentage and the leaf area index. It is calculated differently, according to the satellite season, taking into account the spectral reflectance of the red band and that of the near infrared band. Obtaining NDVI index for the same area and on grounds of images taken over on different dates represents one of the manners of taking into evidence the changes occurred within the images taking over laps of time. The paper analyzes NDVI images obtained for U.P. Moieciului Valley, by processing two Landsat records, taken over on different times.