qgis - Extracting Metadata of a GeoTiff image

I am working on Landsat 8 satellite image and want to perform land cover classification for a particular region Preferred software tool is R I have formed a RGB image from the satellite data and now want to extract the metadata of that image to work further on it

How can the metadata be extracted? Can it be done in R or should I use QGIS?

Answer

In QGIS, Right-click the layer you are visualizing > Click on Properties > Click on the blue i symbol (which stands for Metadata)

In R:

library(sp)
library(raster)
library(SDMTools)

#Create a raster layer and view the same
layer <- raster("path to folder where image is stored")
writeRaster(layer,"path to where want to write it to", format="ascii")


###Convert the ascii to dataframe
layer1 <- asc2dataframe("path where the ascii is stored")

Above should give you values for each row.