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Does anyone know how I can extract the raster field names (VALUE, COUNT and other existing field names on a categorical raster file) in R?

I am using the raster package to load the raster files.

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up vote 4 down vote accepted

You should first create a stack of layer(s) from your raster object.

ra <- system.file("external/test.grd")
s <- stack(ra)

#how many layers in the stack

#info about the layer stack data

More details here:

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