I have a set of coordinates for which I want to extract temperature values from a raster. I am using the extract function from the raster library in R. Looking at the interpolation methods, there are options for simple and bilinear interpolation. I am not very familiar with raster extraction literature but I was wondering if there are other alternatives in R for other interpolation methods which give a better estimate for values at a point than bilinear interpolation. Also is bilinear the usual method used in practice? Thanks.
Bilinear its a good approach when you are working with continuous data and its very usual. Simple it's useful when you are working with discrete data, because you don’t generate new values of the variable. extract() allows other methods, using buffer and fun arguments.