In this section, we are going to transfer the values of a given raster from its own grid to a different grid. This operation is known as resampling. Raster reprojection is a closely related operation; it is basically resampling to a grid having a different CRS than that of the original raster.
Raster resampling can be performed using the resample function. The required parameters of this function are as follows:
The raster whose values are to be resampled (
x)A raster that defines the grid to which the values will be transferred (
y)The resampling method (
method)
The resample function currently provides two resampling methods. The method that we use determines the way in which a cell in the new raster gets its value, based on the old raster's values:
"ngb": Nearest-neighbor; assigns the value of the nearest cell"bilinear": Bilinear interpolation; assigns a weighted average of the four nearest cells (the default)